; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

target datalayout = "e-p:64:64-p1:16:16-p2:32:32:32-p3:64:64:64-f16:32"

%intstruct = type { i32 }
%pair = type { i32, i32 }
%struct.B = type { double }
%struct.A = type { %struct.B, i32, i32 }
%struct.C = type { [7 x i8] }


@Global = external global [10 x i8]
@Global_as1 = external addrspace(1) global [10 x i8]

declare void @use(ptr)
declare void @use.i64(i64)

; Test noop elimination
define ptr @test1(ptr %I) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    ret ptr [[I:%.*]]
;
  ret ptr %I
}

define ptr addrspace(1) @test1_as1(ptr addrspace(1) %I) {
; CHECK-LABEL: @test1_as1(
; CHECK-NEXT:    ret ptr addrspace(1) [[I:%.*]]
;
  ret ptr addrspace(1) %I
}

; Test noop elimination
define ptr @test2(ptr %I) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    ret ptr [[I:%.*]]
;
  %A = getelementptr i32, ptr %I
  ret ptr %A
}

; Test that two array indexing geps fold
define ptr @test3(ptr %I) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    [[B:%.*]] = getelementptr i8, ptr [[I:%.*]], i64 84
; CHECK-NEXT:    ret ptr [[B]]
;
  %A = getelementptr i32, ptr %I, i64 17
  %B = getelementptr i32, ptr %A, i64 4
  ret ptr %B
}

; Test that two getelementptr insts fold
define ptr @test4(ptr %I) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    [[A:%.*]] = getelementptr i8, ptr [[I:%.*]], i64 4
; CHECK-NEXT:    ret ptr [[A]]
;
  %A = getelementptr { i32 }, ptr %I, i64 1
  ret ptr %A
}

define void @test5(i8 %B) {
        ; This should be turned into a constexpr instead of being an instruction
; CHECK-LABEL: @test5(
; CHECK-NEXT:    store i8 [[B:%.*]], ptr getelementptr inbounds nuw (i8, ptr @Global, i64 4), align 1
; CHECK-NEXT:    ret void
;
  %A = getelementptr [10 x i8], ptr @Global, i64 0, i64 4
  store i8 %B, ptr %A
  ret void
}

define void @test5_as1(i8 %B) {
        ; This should be turned into a constexpr instead of being an instruction
; CHECK-LABEL: @test5_as1(
; CHECK-NEXT:    store i8 [[B:%.*]], ptr addrspace(1) getelementptr inbounds nuw (i8, ptr addrspace(1) @Global_as1, i16 4), align 1
; CHECK-NEXT:    ret void
;
  %A = getelementptr [10 x i8], ptr addrspace(1) @Global_as1, i16 0, i16 4
  store i8 %B, ptr addrspace(1) %A
  ret void
}

%as1_ptr_struct = type { ptr addrspace(1) }
%as2_ptr_struct = type { ptr addrspace(2) }

@global_as2 = addrspace(2) global i32 zeroinitializer
@global_as1_as2_ptr = addrspace(1) global %as2_ptr_struct { ptr addrspace(2) @global_as2 }

; This should be turned into a constexpr instead of being an instruction
define void @test_evaluate_gep_nested_as_ptrs(ptr addrspace(2) %B) {
; CHECK-LABEL: @test_evaluate_gep_nested_as_ptrs(
; CHECK-NEXT:    store ptr addrspace(2) [[B:%.*]], ptr addrspace(1) @global_as1_as2_ptr, align 4
; CHECK-NEXT:    ret void
;
  store ptr addrspace(2) %B, ptr addrspace(1) @global_as1_as2_ptr
  ret void
}

@arst = addrspace(1) global [4 x ptr addrspace(2)] zeroinitializer

define void @test_evaluate_gep_as_ptrs_array(ptr addrspace(2) %B) {
; CHECK-LABEL: @test_evaluate_gep_as_ptrs_array(
; CHECK-NEXT:    store ptr addrspace(2) [[B:%.*]], ptr addrspace(1) getelementptr inbounds nuw (i8, ptr addrspace(1) @arst, i16 8), align 4
; CHECK-NEXT:    ret void
;

  %A = getelementptr [4 x ptr addrspace(2)], ptr addrspace(1) @arst, i16 0, i16 2
  store ptr addrspace(2) %B, ptr addrspace(1) %A
  ret void
}

; This should be turned into a constexpr instead of being an instruction
define void @test_overaligned_vec(i8 %B) {
; CHECK-LABEL: @test_overaligned_vec(
; CHECK-NEXT:    store i8 [[B:%.*]], ptr getelementptr inbounds nuw (i8, ptr @Global, i64 2), align 1
; CHECK-NEXT:    ret void
;
  %A = getelementptr <2 x half>, ptr @Global, i64 0, i64 1
  store i8 %B, ptr %A
  ret void
}

define ptr @test7(ptr %I, i64 %C, i64 %D) {
; CHECK-LABEL: @test7(
; CHECK-NEXT:    [[A:%.*]] = getelementptr i32, ptr [[I:%.*]], i64 [[C:%.*]]
; CHECK-NEXT:    [[B:%.*]] = getelementptr i32, ptr [[A]], i64 [[D:%.*]]
; CHECK-NEXT:    ret ptr [[B]]
;
  %A = getelementptr i32, ptr %I, i64 %C
  %B = getelementptr i32, ptr %A, i64 %D
  ret ptr %B
}

define ptr @test8(ptr %X) {
        ;; Fold into the cast.
; CHECK-LABEL: @test8(
; CHECK-NEXT:    ret ptr [[X:%.*]]
;
  ret ptr %X
}

define i32 @test9() {
; CHECK-LABEL: @test9(
; CHECK-NEXT:    ret i32 8
;
  %A = getelementptr { i32, double }, ptr null, i32 0, i32 1
  %B = ptrtoint ptr %A to i32
  ret i32 %B
}

define i1 @test10(ptr %x, ptr %y) {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    [[T4:%.*]] = icmp eq ptr [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i1 [[T4]]
;
  %t1 = getelementptr { i32, i32 }, ptr %x, i32 0, i32 1
  %t3 = getelementptr { i32, i32 }, ptr %y, i32 0, i32 1
  %t4 = icmp eq ptr %t1, %t3
  ret i1 %t4
}

define i1 @test10_addrspacecast(ptr %x, ptr addrspace(3) %y) {
; CHECK-LABEL: @test10_addrspacecast(
; CHECK-NEXT:    [[T1:%.*]] = getelementptr i8, ptr [[X:%.*]], i64 4
; CHECK-NEXT:    [[T3:%.*]] = getelementptr i8, ptr addrspace(3) [[Y:%.*]], i64 4
; CHECK-NEXT:    [[T3_C:%.*]] = addrspacecast ptr addrspace(3) [[T3]] to ptr
; CHECK-NEXT:    [[T4:%.*]] = icmp eq ptr [[T1]], [[T3_C]]
; CHECK-NEXT:    ret i1 [[T4]]
;
  %t1 = getelementptr { i32, i32 }, ptr %x, i32 0, i32 1
  %t3 = getelementptr { i32, i32 }, ptr addrspace(3) %y, i32 0, i32 1
  %t3.c = addrspacecast ptr addrspace(3) %t3 to ptr
  %t4 = icmp eq ptr %t1, %t3.c
  ret i1 %t4
}

define i1 @test11(ptr %X) {
; CHECK-LABEL: @test11(
; CHECK-NEXT:    [[Q:%.*]] = icmp eq ptr [[X:%.*]], null
; CHECK-NEXT:    ret i1 [[Q]]
;
  %P = getelementptr { i32, i32 }, ptr %X, i32 0, i32 0
  %Q = icmp eq ptr %P, null
  ret i1 %Q
}


; PR4748
define i32 @test12(ptr %a) {
; CHECK-LABEL: @test12(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[G3:%.*]] = getelementptr i8, ptr [[A:%.*]], i64 8
; CHECK-NEXT:    store i32 10, ptr [[G3]], align 4
; CHECK-NEXT:    ret i32 10
;
entry:
  %g3 = getelementptr %struct.A, ptr %a, i32 0, i32 1
  store i32 10, ptr %g3, align 4


  %g5 = getelementptr %struct.A, ptr %a, i32 0, i32 1
  %a_a = load i32, ptr %g5, align 4
  ret i32 %a_a
}


; PR2235
%S = type { i32, [ 100 x i32] }
define i1 @test13(i64 %X, ptr %P) {
; CHECK-LABEL: @test13(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i64 [[X:%.*]], -1
; CHECK-NEXT:    ret i1 [[C]]
;
  %A = getelementptr inbounds %S, ptr %P, i32 0, i32 1, i64 %X
  %C = icmp eq ptr %A, %P
  ret i1 %C
}

define <2 x i1> @test13_vector(<2 x i64> %X, <2 x ptr> %P) nounwind {
; CHECK-LABEL: @test13_vector(
; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i64> [[X:%.*]], splat (i64 -1)
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %A = getelementptr inbounds %S, <2 x ptr> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, <2 x i64> %X
  %B = getelementptr inbounds %S, <2 x ptr> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 0, i32 0>
  %C = icmp eq <2 x ptr> %A, %B
  ret <2 x i1> %C
}

define <2 x i1> @test13_vector2(i64 %X, <2 x ptr> %P) nounwind {
; CHECK-LABEL: @test13_vector2(
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[X:%.*]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = shl <2 x i64> [[DOTSPLATINSERT]], <i64 2, i64 0>
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq <2 x i64> [[TMP1]], <i64 -4, i64 poison>
; CHECK-NEXT:    [[C:%.*]] = shufflevector <2 x i1> [[TMP2]], <2 x i1> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %A = getelementptr inbounds %S, <2 x ptr> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, i64 %X
  %B = getelementptr inbounds %S, <2 x ptr> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 0, i32 0>
  %C = icmp eq <2 x ptr> %A, %B
  ret <2 x i1> %C
}

define <2 x i1> @test13_fixed_fixed(i64 %X, ptr %P, <2 x i64> %y) nounwind {
; CHECK-LABEL: @test13_fixed_fixed(
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[X:%.*]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = shl <2 x i64> [[DOTSPLATINSERT]], <i64 3, i64 0>
; CHECK-NEXT:    [[A_IDX:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[B_IDX:%.*]] = shl nsw <2 x i64> [[Y:%.*]], splat (i64 4)
; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i64> [[A_IDX]], [[B_IDX]]
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %A = getelementptr inbounds <2 x i64>, ptr %P, <2 x i64> zeroinitializer, i64 %X
  %B = getelementptr inbounds <2 x i64>, ptr %P, <2 x i64> %y
  %C = icmp eq <2 x ptr> %A, %B
  ret <2 x i1> %C
}

define <2 x i1> @test13_fixed_scalable(i64 %X, ptr %P, <2 x i64> %y) nounwind {
; CHECK-LABEL: @test13_fixed_scalable(
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[X:%.*]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = shl <2 x i64> [[DOTSPLATINSERT]], <i64 3, i64 0>
; CHECK-NEXT:    [[A_IDX:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[TMP3:%.*]] = shl i64 [[TMP2]], 4
; CHECK-NEXT:    [[DOTSPLATINSERT1:%.*]] = insertelement <2 x i64> poison, i64 [[TMP3]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <2 x i64> [[DOTSPLATINSERT1]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[B_IDX:%.*]] = mul nsw <2 x i64> [[Y:%.*]], [[DOTSPLAT]]
; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i64> [[A_IDX]], [[B_IDX]]
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %A = getelementptr inbounds <vscale x 2 x i64>, ptr %P, <2 x i64> zeroinitializer, i64 %X
  %B = getelementptr inbounds <vscale x 2 x i64>, ptr %P, <2 x i64> %y
  %C = icmp eq <2 x ptr> %A, %B
  ret <2 x i1> %C
}

define <vscale x 2 x i1> @test13_scalable_scalable(i64 %X, ptr %P, <vscale x 2 x i64> %y) nounwind {
; CHECK-LABEL: @test13_scalable_scalable(
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[X:%.*]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[DOTSPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
; CHECK-NEXT:    [[A_IDX:%.*]] = shl nsw <vscale x 2 x i64> [[DOTSPLAT]], splat (i64 3)
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[TMP2:%.*]] = shl i64 [[TMP1]], 4
; CHECK-NEXT:    [[DOTSPLATINSERT1:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[TMP2]], i64 0
; CHECK-NEXT:    [[DOTSPLAT2:%.*]] = shufflevector <vscale x 2 x i64> [[DOTSPLATINSERT1]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
; CHECK-NEXT:    [[B_IDX:%.*]] = mul nsw <vscale x 2 x i64> [[Y:%.*]], [[DOTSPLAT2]]
; CHECK-NEXT:    [[C:%.*]] = icmp eq <vscale x 2 x i64> [[A_IDX]], [[B_IDX]]
; CHECK-NEXT:    ret <vscale x 2 x i1> [[C]]
;
  %A = getelementptr inbounds <vscale x 2 x i64>, ptr %P, <vscale x 2 x i64> zeroinitializer, i64 %X
  %B = getelementptr inbounds <vscale x 2 x i64>, ptr %P, <vscale x 2 x i64> %y
  %C = icmp eq <vscale x 2 x ptr> %A, %B
  ret <vscale x 2 x i1> %C
}

; This is a test of icmp + shl nuw in disguise - 4611... is 0x3fff...
define <2 x i1> @test13_vector3(i64 %X, <2 x ptr> %P) nounwind {
; CHECK-LABEL: @test13_vector3(
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[X:%.*]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = shl <2 x i64> [[DOTSPLATINSERT]], <i64 2, i64 0>
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq <2 x i64> [[TMP1]], <i64 4, i64 poison>
; CHECK-NEXT:    [[C:%.*]] = shufflevector <2 x i1> [[TMP2]], <2 x i1> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %A = getelementptr inbounds %S, <2 x ptr> %P, <2 x i64> zeroinitializer, <2 x i32> <i32 1, i32 1>, i64 %X
  %B = getelementptr inbounds %S, <2 x ptr> %P, <2 x i64> <i64 0, i64 0>, <2 x i32> <i32 1, i32 1>, i64 1
  %C = icmp eq <2 x ptr> %A, %B
  ret <2 x i1> %C
}

define i1 @test13_as1(i16 %X, ptr addrspace(1) %P) {
; CHECK-LABEL: @test13_as1(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i16 [[X:%.*]], -1
; CHECK-NEXT:    ret i1 [[C]]
;
  %A = getelementptr inbounds %S, ptr addrspace(1) %P, i16 0, i32 1, i16 %X
  %C = icmp eq ptr addrspace(1) %A, %P
  ret i1 %C
}

define <2 x i1> @test13_vector_as1(<2 x i16> %X, <2 x ptr addrspace(1)> %P) {
; CHECK-LABEL: @test13_vector_as1(
; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i16> [[X:%.*]], splat (i16 -1)
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %A = getelementptr inbounds %S, <2 x ptr addrspace(1)> %P, <2 x i16> <i16 0, i16 0>, <2 x i32> <i32 1, i32 1>, <2 x i16> %X
  %B = getelementptr inbounds %S, <2 x ptr addrspace(1)> %P, <2 x i16> <i16 0, i16 0>, <2 x i32> <i32 0, i32 0>
  %C = icmp eq <2 x ptr addrspace(1)> %A, %B
  ret <2 x i1> %C
}

define i1 @test13_i32(i32 %X, ptr %P) {
; CHECK-LABEL: @test13_i32(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i32 [[X:%.*]], -1
; CHECK-NEXT:    ret i1 [[C]]
;
  %A = getelementptr inbounds %S, ptr %P, i32 0, i32 1, i32 %X
  %C = icmp eq ptr %A, %P
  ret i1 %C
}

define i1 @test13_i16(i16 %X, ptr %P) {
; CHECK-LABEL: @test13_i16(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i16 [[X:%.*]], -1
; CHECK-NEXT:    ret i1 [[C]]
;
  %A = getelementptr inbounds %S, ptr %P, i16 0, i32 1, i16 %X
  %C = icmp eq ptr %A, %P
  ret i1 %C
}

define i1 @test13_i128(i128 %X, ptr %P) {
; CHECK-LABEL: @test13_i128(
; CHECK-NEXT:    [[TMP1:%.*]] = trunc i128 [[X:%.*]] to i64
; CHECK-NEXT:    [[C:%.*]] = icmp eq i64 [[TMP1]], -1
; CHECK-NEXT:    ret i1 [[C]]
;
  %A = getelementptr inbounds %S, ptr %P, i128 0, i32 1, i128 %X
  %C = icmp eq ptr %A, %P
  ret i1 %C
}


@G = external global [3 x i8]
define ptr @test14(i32 %idx) {
; CHECK-LABEL: @test14(
; CHECK-NEXT:    [[ZEXT:%.*]] = zext i32 [[IDX:%.*]] to i64
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr @G, i64 [[ZEXT]]
; CHECK-NEXT:    ret ptr [[T]]
;
  %zext = zext i32 %idx to i64
  %t = getelementptr i8, ptr @G, i64 %zext
  ret ptr %t
}


; Test folding of constantexpr geps into normal geps.
@Array = external global [40 x i32]
define ptr @test15(i64 %X) {
; CHECK-LABEL: @test15(
; CHECK-NEXT:    [[A:%.*]] = getelementptr i32, ptr @Array, i64 [[X:%.*]]
; CHECK-NEXT:    ret ptr [[A]]
;
  %A = getelementptr i32, ptr @Array, i64 %X
  ret ptr %A
}

define ptr @test_index_canon(ptr %X, i32 %Idx) {
; CHECK-LABEL: @test_index_canon(
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[IDX:%.*]] to i64
; CHECK-NEXT:    [[R:%.*]] = getelementptr i32, ptr [[X:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %R = getelementptr i32, ptr %X, i32 %Idx
  ret ptr %R
}

define ptr @test_index_canon_inbounds(ptr %X, i32 %Idx) {
; CHECK-LABEL: @test_index_canon_inbounds(
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[IDX:%.*]] to i64
; CHECK-NEXT:    [[R:%.*]] = getelementptr inbounds i32, ptr [[X:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %R = getelementptr inbounds i32, ptr %X, i32 %Idx
  ret ptr %R
}

define ptr @test_index_canon_nusw_nuw(ptr %X, i32 %Idx) {
; CHECK-LABEL: @test_index_canon_nusw_nuw(
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[IDX:%.*]] to i64
; CHECK-NEXT:    [[R:%.*]] = getelementptr nusw nuw i32, ptr [[X:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %R = getelementptr nusw nuw i32, ptr %X, i32 %Idx
  ret ptr %R
}

define ptr @test_index_canon_const_expr_inbounds() {
; CHECK-LABEL: @test_index_canon_const_expr_inbounds(
; CHECK-NEXT:    ret ptr getelementptr inbounds nuw (i8, ptr @Global, i64 123)
;
  ret ptr getelementptr inbounds (i8, ptr @Global, i32 123)
}

define ptr @test_index_canon_const_expr_nuw_nusw() {
; CHECK-LABEL: @test_index_canon_const_expr_nuw_nusw(
; CHECK-NEXT:    ret ptr getelementptr nusw nuw (i8, ptr @Global, i64 123)
;
  ret ptr getelementptr nusw nuw (i8, ptr @Global, i32 123)
}

define ptr @test_const_gep_gep_nuw() {
; CHECK-LABEL: @test_const_gep_gep_nuw(
; CHECK-NEXT:    ret ptr getelementptr nuw (i8, ptr @Global, i64 246)
;
  ret ptr getelementptr nuw (i8, ptr getelementptr nuw (i8, ptr @Global, i64 123), i64 123)
}

define ptr @test_const_gep_gep_nusw_no_overflow() {
; CHECK-LABEL: @test_const_gep_gep_nusw_no_overflow(
; CHECK-NEXT:    ret ptr getelementptr nusw nuw (i8, ptr @Global, i64 246)
;
  ret ptr getelementptr nusw (i8, ptr getelementptr nusw (i8, ptr @Global, i64 123), i64 123)
}

define ptr @test_const_gep_gep_nusw_no_overflow_neg() {
; CHECK-LABEL: @test_const_gep_gep_nusw_no_overflow_neg(
; CHECK-NEXT:    ret ptr getelementptr nusw (i8, ptr @Global, i64 -246)
;
  ret ptr getelementptr nusw (i8, ptr getelementptr nusw (i8, ptr @Global, i64 -123), i64 -123)
}

define ptr @test_const_gep_gep_nusw_overflow() {
; CHECK-LABEL: @test_const_gep_gep_nusw_overflow(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @Global, i64 -2)
;
  ret ptr getelementptr nusw (i8, ptr getelementptr nusw (i8, ptr @Global, i64 u0x7fffffffffffffff), i64 u0x7fffffffffffffff)
}

define i1 @test17(ptr %P, i32 %I, i32 %J) {
; CHECK-LABEL: @test17(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i32 [[I:%.*]], [[J:%.*]]
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr %P, i32 %I
  %Y = getelementptr inbounds i16, ptr %P, i32 %J
  %C = icmp ult ptr %X, %Y
  ret i1 %C
}

define i1 @test18(ptr %P, i32 %I) {
; CHECK-LABEL: @test18(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i32 [[I:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr %P, i32 %I
  %C = icmp ult ptr %X, %P
  ret i1 %C
}

; Larger than the pointer size for a non-zero address space
define i1 @test18_as1(ptr addrspace(1) %P, i32 %I) {
; CHECK-LABEL: @test18_as1(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[I:%.*]], 32768
; CHECK-NEXT:    [[C:%.*]] = icmp ne i32 [[TMP1]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr addrspace(1) %P, i32 %I
  %C = icmp ult ptr addrspace(1) %X, %P
  ret i1 %C
}

; Smaller than the pointer size for a non-zero address space
define i1 @test18_as1_i32(ptr addrspace(1) %P, i32 %I) {
; CHECK-LABEL: @test18_as1_i32(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[I:%.*]], 32768
; CHECK-NEXT:    [[C:%.*]] = icmp ne i32 [[TMP1]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr addrspace(1) %P, i32 %I
  %C = icmp ult ptr addrspace(1) %X, %P
  ret i1 %C
}

; Smaller than pointer size
define i1 @test18_i16(ptr %P, i16 %I) {
; CHECK-LABEL: @test18_i16(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i16 [[I:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr %P, i16 %I
  %C = icmp ult ptr %X, %P
  ret i1 %C
}

; Same as pointer size
define i1 @test18_i64(ptr %P, i64 %I) {
; CHECK-LABEL: @test18_i64(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i64 [[I:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr %P, i64 %I
  %C = icmp ult ptr %X, %P
  ret i1 %C
}

; Larger than the pointer size
define i1 @test18_i128(ptr %P, i128 %I) {
; CHECK-LABEL: @test18_i128(
; CHECK-NEXT:    [[TMP1:%.*]] = and i128 [[I:%.*]], 9223372036854775808
; CHECK-NEXT:    [[C:%.*]] = icmp ne i128 [[TMP1]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %X = getelementptr inbounds i16, ptr %P, i128 %I
  %C = icmp ult ptr %X, %P
  ret i1 %C
}

define i32 @test19(ptr %P, i32 %A, i32 %B) {
; CHECK-LABEL: @test19(
; CHECK-NEXT:    [[T10:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[T11:%.*]] = zext i1 [[T10]] to i32
; CHECK-NEXT:    ret i32 [[T11]]
;
  %t4 = getelementptr inbounds i32, ptr %P, i32 %A
  %t9 = getelementptr inbounds i32, ptr %P, i32 %B
  %t10 = icmp eq ptr %t4, %t9
  %t11 = zext i1 %t10 to i32
  ret i32 %t11
}

define i32 @test20(ptr %P, i32 %A, i32 %B) {
; CHECK-LABEL: @test20(
; CHECK-NEXT:    [[T6:%.*]] = icmp eq i32 [[A:%.*]], 0
; CHECK-NEXT:    [[T7:%.*]] = zext i1 [[T6]] to i32
; CHECK-NEXT:    ret i32 [[T7]]
;
  %t4 = getelementptr inbounds i32, ptr %P, i32 %A
  %t6 = icmp eq ptr %t4, %P
  %t7 = zext i1 %t6 to i32
  ret i32 %t7
}

define i32 @test20_as1(ptr addrspace(1) %P, i32 %A, i32 %B) {
; CHECK-LABEL: @test20_as1(
; CHECK-NEXT:    [[TMP1:%.*]] = trunc i32 [[A:%.*]] to i16
; CHECK-NEXT:    [[T6:%.*]] = icmp eq i16 [[TMP1]], 0
; CHECK-NEXT:    [[T7:%.*]] = zext i1 [[T6]] to i32
; CHECK-NEXT:    ret i32 [[T7]]
;
  %t4 = getelementptr inbounds i32, ptr addrspace(1) %P, i32 %A
  %t6 = icmp eq ptr addrspace(1) %t4, %P
  %t7 = zext i1 %t6 to i32
  ret i32 %t7
}


define i32 @test21() {
; CHECK-LABEL: @test21(
; CHECK-NEXT:    [[PBOB1:%.*]] = alloca [[INTSTRUCT:%.*]], align 8
; CHECK-NEXT:    [[RVAL:%.*]] = load i32, ptr [[PBOB1]], align 4
; CHECK-NEXT:    ret i32 [[RVAL]]
;
  %pbob1 = alloca %intstruct
  %pbob2 = getelementptr %intstruct, ptr %pbob1
  %rval = load i32, ptr %pbob2
  ret i32 %rval
}


@A = global i32 1                 ; <ptr> [#uses=1]
@B = global i32 2                 ; <ptr> [#uses=1]

define i1 @test22() {
; CHECK-LABEL: @test22(
; CHECK-NEXT:    [[C:%.*]] = icmp ult ptr getelementptr inbounds nuw (i8, ptr @A, i64 4), getelementptr (i8, ptr @B, i64 8)
; CHECK-NEXT:    ret i1 [[C]]
;
  %C = icmp ult ptr getelementptr (i32, ptr @A, i64 1),
  getelementptr (i32, ptr @B, i64 2)
  ret i1 %C
}


%X = type { [10 x i32], float }

define i1 @test23() {
; CHECK-LABEL: @test23(
; CHECK-NEXT:    ret i1 false
;
  %A = getelementptr %X, ptr null, i64 0, i32 0, i64 0                  ; <ptr> [#uses=1]
  %B = icmp ne ptr %A, null                ; <i1> [#uses=1]
  ret i1 %B
}

define void @test25() {
; CHECK-LABEL: @test25(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    unreachable
;
entry:
  %t = getelementptr { i64, i64, i64, i64 }, ptr null, i32 0, i32 3
  %t.upgrd.1 = load i64, ptr %t
  %t8.ui = load i64, ptr null
  %t8 = bitcast i64 %t8.ui to i64
  %t9 = and i64 %t8, %t.upgrd.1
  %sext = trunc i64 %t9 to i32
  %t27.i = sext i32 %sext to i64
  tail call void @foo25( i32 0, i64 %t27.i )
  unreachable
}

declare void @foo25(i32, i64)


; PR1637
define i1 @test26(ptr %arr) {
; CHECK-LABEL: @test26(
; CHECK-NEXT:    ret i1 true
;
  %X = getelementptr i8, ptr %arr, i32 1
  %Y = getelementptr i8, ptr %arr, i32 1
  %test = icmp uge ptr %X, %Y
  ret i1 %test
}

  %struct.__large_struct = type { [100 x i64] }
  %struct.compat_siginfo = type { i32, i32, i32, { [29 x i32] } }
  %struct.siginfo_t = type { i32, i32, i32, { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] } }
  %struct.sigval_t = type { ptr }

define i32 @test27(ptr %to, ptr %from) {
; CHECK-LABEL: @test27(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[FROM_ADDR:%.*]] = alloca ptr, align 8
; CHECK-NEXT:    [[T344:%.*]] = load ptr, ptr [[FROM_ADDR]], align 8
; CHECK-NEXT:    [[T348:%.*]] = getelementptr i8, ptr [[T344]], i64 24
; CHECK-NEXT:    [[T351:%.*]] = load i32, ptr [[T348]], align 8
; CHECK-NEXT:    [[T360:%.*]] = call i32 asm sideeffect "...", "=r,ir,*m,i,0,~{dirflag},~{fpsr},~{flags}"(i32 [[T351]], ptr elementtype([[STRUCT___LARGE_STRUCT:%.*]]) null, i32 -14, i32 0) #[[ATTR0:[0-9]+]]
; CHECK-NEXT:    unreachable
;
entry:
  %from_addr = alloca ptr
  %t344 = load ptr, ptr %from_addr, align 8
  %t345 = getelementptr %struct.siginfo_t, ptr %t344, i32 0, i32 3
  %t346 = getelementptr { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] }, ptr %t345, i32 0, i32 0
  %t348 = getelementptr { i32, i32, %struct.sigval_t }, ptr %t346, i32 0, i32 2
  %t351 = load i32, ptr %t348, align 8
  %t360 = call i32 asm sideeffect "...",
  "=r,ir,*m,i,0,~{dirflag},~{fpsr},~{flags}"( i32 %t351, ptr elementtype(%struct.__large_struct) null, i32 -14, i32 0 )
  unreachable
}

; PR1978
  %struct.x = type <{ i8 }>
@.str = internal constant [6 x i8] c"Main!\00"
@.str1 = internal constant [12 x i8] c"destroy %p\0A\00"

define i32 @test28() nounwind  {
; CHECK-LABEL: @test28(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ORIENTATIONS:%.*]] = alloca [1 x [1 x %struct.x]], align 8
; CHECK-NEXT:    [[T3:%.*]] = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str) #[[ATTR0]]
; CHECK-NEXT:    [[T45:%.*]] = getelementptr inbounds nuw i8, ptr [[ORIENTATIONS]], i64 1
; CHECK-NEXT:    br label [[BB10:%.*]]
; CHECK:       bb10:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDVAR_NEXT:%.*]], [[BB10]] ]
; CHECK-NEXT:    [[T12_REC:%.*]] = xor i32 [[INDVAR]], -1
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[T12_REC]] to i64
; CHECK-NEXT:    [[T12:%.*]] = getelementptr inbounds [[STRUCT_X:%.*]], ptr [[T45]], i64 [[TMP0]]
; CHECK-NEXT:    [[T16:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str1, ptr nonnull [[T12]]) #[[ATTR0]]
; CHECK-NEXT:    [[T84:%.*]] = icmp eq ptr [[T12]], [[ORIENTATIONS]]
; CHECK-NEXT:    [[INDVAR_NEXT]] = add i32 [[INDVAR]], 1
; CHECK-NEXT:    br i1 [[T84]], label [[BB17:%.*]], label [[BB10]]
; CHECK:       bb17:
; CHECK-NEXT:    ret i32 0
;
entry:
  %orientations = alloca [1 x [1 x %struct.x]]
  %t3 = call i32 @puts( ptr @.str ) nounwind
  %t45 = getelementptr inbounds [1 x [1 x %struct.x]], ptr %orientations, i32 1, i32 0, i32 0
  br label %bb10

bb10:
  %indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb10 ]
  %t.0.reg2mem.0.rec = mul i32 %indvar, -1
  %t12.rec = add i32 %t.0.reg2mem.0.rec, -1
  %t12 = getelementptr inbounds %struct.x, ptr %t45, i32 %t12.rec
  %t16 = call i32 (ptr, ...) @printf( ptr nonnull dereferenceable(1) @.str1, ptr %t12 ) nounwind
  %t84 = icmp eq ptr %t12, %orientations
  %indvar.next = add i32 %indvar, 1
  br i1 %t84, label %bb17, label %bb10

bb17:
  ret i32 0
}

declare i32 @puts(ptr)

declare i32 @printf(ptr, ...)


; rdar://6762290
  %T = type <{ i64, i64, i64 }>
define i32 @test29(ptr %start, i32 %X) nounwind {
; CHECK-LABEL: @test29(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    store i1 true, ptr poison, align 1
; CHECK-NEXT:    br i1 poison, label [[IF_THEN216:%.*]], label [[IF_END363:%.*]]
; CHECK:       if.then216:
; CHECK-NEXT:    ret i32 1
; CHECK:       if.end363:
; CHECK-NEXT:    ret i32 0
;
entry:
  %t3 = load i64, ptr null
  %add.ptr = getelementptr i8, ptr %start, i64 %t3
  %t158 = load i32, ptr null
  %add.ptr159 = getelementptr %T, ptr null, i32 %t158
  %add.ptr212 = getelementptr i8, ptr %start, i32 %X
  %cmp214 = icmp ugt ptr %add.ptr212, %add.ptr
  br i1 %cmp214, label %if.then216, label %if.end363

if.then216:
  ret i32 1

if.end363:
  ret i32 0
}


; PR3694
define i32 @test30(i32 %m, i32 %n) nounwind {
; CHECK-LABEL: @test30(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = alloca i32, i64 [[TMP0]], align 4
; CHECK-NEXT:    call void @test30f(ptr nonnull [[TMP1]]) #[[ATTR0]]
; CHECK-NEXT:    [[TMP2:%.*]] = sext i32 [[M:%.*]] to i64
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr [0 x i32], ptr [[TMP1]], i64 0, i64 [[TMP2]]
; CHECK-NEXT:    [[TMP4:%.*]] = load i32, ptr [[TMP3]], align 4
; CHECK-NEXT:    ret i32 [[TMP4]]
;
entry:
  %0 = alloca i32, i32 %n, align 4
  call void @test30f(ptr %0) nounwind
  %1 = getelementptr [0 x i32], ptr %0, i32 0, i32 %m
  %2 = load i32, ptr %1, align 4
  ret i32 %2
}

declare void @test30f(ptr)


define i1 @test31(ptr %A) {
; CHECK-LABEL: @test31(
; CHECK-NEXT:    ret i1 true
;
  %B = getelementptr i32, ptr %A, i32 1
  %C = getelementptr i32, ptr %A, i64 1
  %V = icmp eq ptr %B, %C
  ret i1 %V
}


; PR1345
define ptr @test32(ptr %v) {
; CHECK-LABEL: @test32(
; CHECK-NEXT:    [[A:%.*]] = alloca [4 x ptr], align 16
; CHECK-NEXT:    store ptr null, ptr [[A]], align 8
; CHECK-NEXT:    [[D:%.*]] = getelementptr inbounds nuw i8, ptr [[A]], i64 8
; CHECK-NEXT:    store ptr [[V:%.*]], ptr [[D]], align 8
; CHECK-NEXT:    [[F:%.*]] = getelementptr inbounds nuw i8, ptr [[A]], i64 16
; CHECK-NEXT:    [[G:%.*]] = load ptr, ptr [[F]], align 8
; CHECK-NEXT:    ret ptr [[G]]
;
  %A = alloca [4 x ptr], align 16
  store ptr null, ptr %A
  %D = getelementptr { [16 x i8] }, ptr %A, i32 0, i32 0, i32 8
  store ptr %v, ptr %D
  %F = getelementptr [4 x ptr], ptr %A, i32 0, i32 2
  %G = load ptr, ptr %F
  ret ptr %G
}

; PR3290
%struct.Key = type { { i32, i32 } }
%struct.anon = type <{ i8, [3 x i8], i32 }>

define ptr @test33(ptr %A) {
; CHECK-LABEL: @test33(
; CHECK-NEXT:    [[C:%.*]] = getelementptr i8, ptr [[A:%.*]], i64 4
; CHECK-NEXT:    ret ptr [[C]]
;
  %C = getelementptr %struct.anon, ptr %A, i32 0, i32 2
  ret ptr %C
}

define ptr addrspace(1) @test33_as1(ptr addrspace(1) %A) {
; CHECK-LABEL: @test33_as1(
; CHECK-NEXT:    [[C:%.*]] = getelementptr i8, ptr addrspace(1) [[A:%.*]], i16 4
; CHECK-NEXT:    ret ptr addrspace(1) [[C]]
;
  %C = getelementptr %struct.anon, ptr addrspace(1) %A, i32 0, i32 2
  ret ptr addrspace(1) %C
}

define ptr addrspace(1) @test33_array_as1(ptr addrspace(1) %A) {
; CHECK-LABEL: @test33_array_as1(
; CHECK-NEXT:    [[C:%.*]] = getelementptr i8, ptr addrspace(1) [[A:%.*]], i16 8
; CHECK-NEXT:    ret ptr addrspace(1) [[C]]
;
  %C = getelementptr [5 x i32], ptr addrspace(1) %A, i32 0, i32 2
  ret ptr addrspace(1) %C
}

; Make sure the GEP indices use the right pointer sized integer
define ptr addrspace(1) @test33_array_struct_as1(ptr addrspace(1) %A) {
; CHECK-LABEL: @test33_array_struct_as1(
; CHECK-NEXT:    [[C:%.*]] = getelementptr i8, ptr addrspace(1) [[A:%.*]], i16 8
; CHECK-NEXT:    ret ptr addrspace(1) [[C]]
;
  %C = getelementptr [20 x i32], ptr addrspace(1) %A, i32 0, i32 2
  ret ptr addrspace(1) %C
}

define ptr addrspace(1) @test33_addrspacecast(ptr %A) {
; CHECK-LABEL: @test33_addrspacecast(
; CHECK-NEXT:    [[B:%.*]] = addrspacecast ptr [[A:%.*]] to ptr addrspace(1)
; CHECK-NEXT:    [[C:%.*]] = getelementptr i8, ptr addrspace(1) [[B]], i16 4
; CHECK-NEXT:    ret ptr addrspace(1) [[C]]
;
  %B = addrspacecast ptr %A to ptr addrspace(1)
  %C = getelementptr %struct.anon, ptr addrspace(1) %B, i32 0, i32 2
  ret ptr addrspace(1) %C
}

  %T2 = type { ptr, i8 }
define ptr @test34(ptr %Val, i64 %V) nounwind {
; CHECK-LABEL: @test34(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_CAST:%.*]] = inttoptr i64 [[V:%.*]] to ptr
; CHECK-NEXT:    ret ptr [[C_CAST]]
;
entry:
  %A = alloca %T2, align 8

  store i64 %V, ptr %A
  %C = load ptr, ptr %A, align 8
  ret ptr %C
}

%t0 = type { ptr, [19 x i8] }
%t1 = type { ptr, [0 x i8] }

@array = external global [11 x i8]

@s = external global %t0
@"\01LC8" = external constant [17 x i8]

; Instcombine should be able to fold this getelementptr.

define i32 @test35() nounwind {
; CHECK-LABEL: @test35(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @"\01LC8", ptr nonnull getelementptr inbounds nuw (i8, ptr @s, i64 8)) #[[ATTR0]]
; CHECK-NEXT:    ret i32 0
;
  call i32 (ptr, ...) @printf(ptr @"\01LC8",
  ptr getelementptr (%t1, ptr @s, i32 0, i32 1, i32 0)) nounwind
  ret i32 0
}

; Don't treat signed offsets as unsigned.
define ptr @test36() nounwind {
; CHECK-LABEL: @test36(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @array, i64 -1)
;
  ret ptr getelementptr ([11 x i8], ptr @array, i32 0, i64 -1)
}

; Instcombine shouldn't assume that gep(A,0,1) != gep(A,1,0).
@A37 = external constant [1 x i8]
define i1 @test37() nounwind {
; CHECK-LABEL: @test37(
; CHECK-NEXT:    ret i1 true
;
  %t = icmp eq ptr getelementptr ([1 x i8], ptr @A37, i64 0, i64 1),
  getelementptr ([1 x i8], ptr @A37, i64 1, i64 0)
  ret i1 %t
}

; Test index promotion
define ptr @test38(ptr %I, i32 %n) {
; CHECK-LABEL: @test38(
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[N:%.*]] to i64
; CHECK-NEXT:    [[A:%.*]] = getelementptr i32, ptr [[I:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[A]]
;
  %A = getelementptr i32, ptr %I, i32 %n
  ret ptr %A
}

; Test that we don't duplicate work when the second gep is a "bitcast".
%pr10322_t = type { ptr }
declare void @pr10322_f2(ptr)
declare void @pr10322_f3(ptr)
define void @pr10322_f1(ptr %foo) {
; CHECK-LABEL: @pr10322_f1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ARRAYIDX8:%.*]] = getelementptr inbounds nuw i8, ptr [[FOO:%.*]], i64 16
; CHECK-NEXT:    call void @pr10322_f2(ptr nonnull [[ARRAYIDX8]]) #[[ATTR0]]
; CHECK-NEXT:    call void @pr10322_f3(ptr nonnull [[ARRAYIDX8]]) #[[ATTR0]]
; CHECK-NEXT:    ret void
;
entry:
  %arrayidx8 = getelementptr inbounds %pr10322_t, ptr %foo, i64 2
  call void @pr10322_f2(ptr %arrayidx8) nounwind
  call void @pr10322_f3(ptr %arrayidx8) nounwind
  ret void

}

; Test that we combine the last two geps in this sequence, before we
; would wait for gep1 and gep2 to be combined and never combine 2 and 3.
%three_gep_t = type {i32}
%three_gep_t2 = type {%three_gep_t}

define void @three_gep_f(ptr %x) {
; CHECK-LABEL: @three_gep_f(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i8, ptr [[X:%.*]], i64 8
; CHECK-NEXT:    call void @three_gep_h(ptr [[GEP1]])
; CHECK-NEXT:    call void @three_gep_g(ptr [[GEP1]])
; CHECK-NEXT:    ret void
;
  %gep1 = getelementptr %three_gep_t2, ptr %x, i64 2
  call void @three_gep_h(ptr %gep1)
  call void @three_gep_g(ptr %gep1)

  ret void
}

declare void @three_gep_g(ptr)
declare void @three_gep_h(ptr)

%struct.ham = type { i32, ptr, ptr, ptr }
%struct.zot = type { i64, i8 }

define void @test39(ptr %arg, i8 %arg1) nounwind {
; CHECK-LABEL: @test39(
; CHECK-NEXT:    [[T:%.*]] = getelementptr inbounds nuw i8, ptr [[ARG:%.*]], i64 16
; CHECK-NEXT:    [[T2:%.*]] = load ptr, ptr [[T]], align 8
; CHECK-NEXT:    [[T4:%.*]] = getelementptr inbounds i8, ptr [[T2]], i64 -8
; CHECK-NEXT:    store i8 [[ARG1:%.*]], ptr [[T4]], align 8
; CHECK-NEXT:    ret void
;
  %t = getelementptr inbounds %struct.ham, ptr %arg, i64 0, i32 2
  %t2 = load ptr, ptr %t, align 8
  %t4 = getelementptr inbounds i8, ptr %t2, i64 -8
  store i8 %arg1, ptr %t4, align 8
  ret void

}

define i1 @pr16483(ptr %a, ptr %b) {
; CHECK-LABEL: @pr16483(
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult ptr [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %cmp = icmp ult ptr %a, %b
  ret i1 %cmp

}

define i8 @test_gep_bitcast_as1(ptr addrspace(1) %arr, i16 %N) {
; CHECK-LABEL: @test_gep_bitcast_as1(
; CHECK-NEXT:    [[V:%.*]] = shl i16 [[N:%.*]], 2
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr addrspace(1) [[ARR:%.*]], i16 [[V]]
; CHECK-NEXT:    [[X:%.*]] = load i8, ptr addrspace(1) [[T]], align 1
; CHECK-NEXT:    ret i8 [[X]]
;
  %V = mul i16 %N, 4
  %t = getelementptr i8, ptr addrspace(1) %arr, i16 %V
  %x = load i8, ptr addrspace(1) %t
  ret i8 %x
}

; The element size of the array matches the element size of the pointer
define i64 @test_gep_bitcast_array_same_size_element(ptr %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element(
; CHECK-NEXT:    [[T_IDX:%.*]] = shl i64 [[N:%.*]], 6
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr [[ARR:%.*]], i64 [[T_IDX]]
; CHECK-NEXT:    [[X:%.*]] = load i64, ptr [[T]], align 4
; CHECK-NEXT:    ret i64 [[X]]
;
  %V = mul i64 %N, 8
  %t = getelementptr i64, ptr %arr, i64 %V
  %x = load i64, ptr %t
  ret i64 %x
}

; gep should be done in the original address space.
define i64 @test_gep_bitcast_array_same_size_element_addrspacecast(ptr %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element_addrspacecast(
; CHECK-NEXT:    [[CAST:%.*]] = addrspacecast ptr [[ARR:%.*]] to ptr addrspace(3)
; CHECK-NEXT:    [[T_IDX:%.*]] = shl i64 [[N:%.*]], 6
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr addrspace(3) [[CAST]], i64 [[T_IDX]]
; CHECK-NEXT:    [[X:%.*]] = load i64, ptr addrspace(3) [[T]], align 4
; CHECK-NEXT:    ret i64 [[X]]
;
  %cast = addrspacecast ptr %arr to ptr addrspace(3)
  %V = mul i64 %N, 8
  %t = getelementptr i64, ptr addrspace(3) %cast, i64 %V
  %x = load i64, ptr addrspace(3) %t
  ret i64 %x
}

; The element size of the array is different the element size of the pointer
define i8 @test_gep_bitcast_array_different_size_element(ptr %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_different_size_element(
; CHECK-NEXT:    [[V:%.*]] = shl i64 [[N:%.*]], 3
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr [[ARR:%.*]], i64 [[V]]
; CHECK-NEXT:    [[X:%.*]] = load i8, ptr [[T]], align 1
; CHECK-NEXT:    ret i8 [[X]]
;
  %V = mul i64 %N, 8
  %t = getelementptr i8, ptr %arr, i64 %V
  %x = load i8, ptr %t
  ret i8 %x
}

define i64 @test_gep_bitcast_array_same_size_element_as1(ptr addrspace(1) %arr, i16 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element_as1(
; CHECK-NEXT:    [[T_IDX:%.*]] = shl i16 [[N:%.*]], 6
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr addrspace(1) [[ARR:%.*]], i16 [[T_IDX]]
; CHECK-NEXT:    [[X:%.*]] = load i64, ptr addrspace(1) [[T]], align 4
; CHECK-NEXT:    ret i64 [[X]]
;
  %V = mul i16 %N, 8
  %t = getelementptr i64, ptr addrspace(1) %arr, i16 %V
  %x = load i64, ptr addrspace(1) %t
  ret i64 %x
}

define i8 @test_gep_bitcast_array_different_size_element_as1(ptr addrspace(1) %arr, i16 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_different_size_element_as1(
; CHECK-NEXT:    [[V:%.*]] = shl i16 [[N:%.*]], 3
; CHECK-NEXT:    [[T:%.*]] = getelementptr i8, ptr addrspace(1) [[ARR:%.*]], i16 [[V]]
; CHECK-NEXT:    [[X:%.*]] = load i8, ptr addrspace(1) [[T]], align 1
; CHECK-NEXT:    ret i8 [[X]]
;
  %V = mul i16 %N, 8
  %t = getelementptr i8, ptr addrspace(1) %arr, i16 %V
  %x = load i8, ptr addrspace(1) %t
  ret i8 %x
}

define i64 @test40() {
; CHECK-LABEL: @test40(
; CHECK-NEXT:    ret i64 8
;
  %array = alloca [3 x i32], align 4
  %gep = getelementptr inbounds [3 x i32], ptr %array, i64 0, i64 2
  %p = ptrtoint ptr %array to i64
  %np = sub i64 0, %p
  %gep2 = getelementptr i8, ptr %gep, i64 %np
  %ret = ptrtoint ptr %gep2 to i64
  ret i64 %ret

}

define i16 @test41(ptr addrspace(1) %array) {
; CHECK-LABEL: @test41(
; CHECK-NEXT:    ret i16 8
;
  %gep = getelementptr inbounds [3 x i32], ptr addrspace(1) %array, i16 0, i16 2
  %p = ptrtoint ptr addrspace(1) %array to i16
  %np = sub i16 0, %p
  %gep2 = getelementptr i8, ptr addrspace(1) %gep, i16 %np
  %ret = ptrtoint ptr addrspace(1) %gep2 to i16
  ret i16 %ret

}

define ptr @test42i(ptr %c1, ptr %c2) {
; CHECK-LABEL: @test42i(
; CHECK-NEXT:    [[PTRTOINT:%.*]] = ptrtoint ptr [[C1:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i8, ptr [[C2:%.*]], i64 [[SUB]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %ptrtoint = ptrtoint ptr %c1 to i64
  %sub = sub i64 0, %ptrtoint
  %gep = getelementptr inbounds i8, ptr %c2, i64 %sub
  ret ptr %gep

}

define ptr @test42(ptr %c1, ptr %c2) {
; CHECK-LABEL: @test42(
; CHECK-NEXT:    [[PTRTOINT:%.*]] = ptrtoint ptr [[C1:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[C2:%.*]], i64 [[SUB]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %ptrtoint = ptrtoint ptr %c1 to i64
  %sub = sub i64 0, %ptrtoint
  %gep = getelementptr i8, ptr %c2, i64 %sub
  ret ptr %gep

}

define ptr @test43i(ptr %c1, ptr %c2) {
; CHECK-LABEL: @test43i(
; CHECK-NEXT:    [[PTRTOINT:%.*]] = ptrtoint ptr [[C1:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT:    [[SHR:%.*]] = ashr i64 [[SUB]], 1
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i16, ptr [[C2:%.*]], i64 [[SHR]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %ptrtoint = ptrtoint ptr %c1 to i64
  %sub = sub i64 0, %ptrtoint
  %shr = ashr i64 %sub, 1
  %gep = getelementptr inbounds i16, ptr %c2, i64 %shr
  ret ptr %gep

}

define ptr @test44i(ptr %c1, ptr %c2) {
; CHECK-LABEL: @test44i(
; CHECK-NEXT:    [[PTRTOINT:%.*]] = ptrtoint ptr [[C1:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT:    [[SHR:%.*]] = sdiv i64 [[SUB]], 7
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [[STRUCT_C:%.*]], ptr [[C2:%.*]], i64 [[SHR]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %ptrtoint = ptrtoint ptr %c1 to i64
  %sub = sub i64 0, %ptrtoint
  %shr = sdiv i64 %sub, 7
  %gep = getelementptr inbounds %struct.C, ptr %c2, i64 %shr
  ret ptr %gep

}

define ptr @test45(ptr %c1, ptr %c2) {
; CHECK-LABEL: @test45(
; CHECK-NEXT:    [[PTRTOINT1:%.*]] = ptrtoint ptr [[C1:%.*]] to i64
; CHECK-NEXT:    [[PTRTOINT2:%.*]] = ptrtoint ptr [[C2:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 [[PTRTOINT2]], [[PTRTOINT1]]
; CHECK-NEXT:    [[SHR:%.*]] = sdiv i64 [[SUB]], 7
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [[STRUCT_C:%.*]], ptr [[C1]], i64 [[SHR]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %ptrtoint1 = ptrtoint ptr %c1 to i64
  %ptrtoint2 = ptrtoint ptr %c2 to i64
  %sub = sub i64 %ptrtoint2, %ptrtoint1   ; C2 - C1
  %shr = sdiv i64 %sub, 7
  %gep = getelementptr inbounds %struct.C, ptr %c1, i64 %shr   ; C1 + (C2 - C1)
  ret ptr %gep
}

define ptr @test46(ptr %c1, ptr %c2, i64 %N) {
; CHECK-LABEL: @test46(
; CHECK-NEXT:    [[PTRTOINT:%.*]] = ptrtoint ptr [[C1:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 0, [[PTRTOINT]]
; CHECK-NEXT:    [[SDIV:%.*]] = sdiv i64 [[SUB]], [[N:%.*]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [[STRUCT_C:%.*]], ptr [[C2:%.*]], i64 [[SDIV]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %ptrtoint = ptrtoint ptr %c1 to i64
  %sub = sub i64 0, %ptrtoint
  %sdiv = sdiv i64 %sub, %N
  %gep = getelementptr inbounds %struct.C, ptr %c2, i64 %sdiv
  ret ptr %gep

}

define ptr @test47(ptr %I, i64 %C, i64 %D) {
; CHECK-LABEL: @test47(
; CHECK-NEXT:    [[B:%.*]] = getelementptr i32, ptr [[I:%.*]], i64 [[D:%.*]]
; CHECK-NEXT:    ret ptr [[B]]
;
  %sub = sub i64 %D, %C
  %A = getelementptr i32, ptr %I, i64 %C
  %B = getelementptr i32, ptr %A, i64 %sub
  ret ptr %B
}

define ptr @test48(ptr %I, i64 %C, i64 %D) {
; CHECK-LABEL: @test48(
; CHECK-NEXT:    [[B:%.*]] = getelementptr i32, ptr [[I:%.*]], i64 [[D:%.*]]
; CHECK-NEXT:    ret ptr [[B]]
;
  %sub = sub i64 %D, %C
  %A = getelementptr i32, ptr %I, i64 %sub
  %B = getelementptr i32, ptr %A, i64 %C
  ret ptr %B
}

define ptr @test49(ptr %I, i64 %C) {
; CHECK-LABEL: @test49(
; CHECK-NEXT:    [[B:%.*]] = getelementptr i8, ptr [[I:%.*]], i64 -4
; CHECK-NEXT:    ret ptr [[B]]
;
  %notC = xor i64 -1, %C
  %A = getelementptr i32, ptr %I, i64 %C
  %B = getelementptr i32, ptr %A, i64 %notC
  ret ptr %B
}

define ptr addrspace(1) @ascast_0_gep(ptr %p) nounwind {
; CHECK-LABEL: @ascast_0_gep(
; CHECK-NEXT:    [[X:%.*]] = addrspacecast ptr [[P:%.*]] to ptr addrspace(1)
; CHECK-NEXT:    ret ptr addrspace(1) [[X]]
;
  %x = addrspacecast ptr %p to ptr addrspace(1)
  ret ptr addrspace(1) %x
}

; Do not merge the GEP and the addrspacecast, because it would undo the
; addrspacecast canonicalization.
define ptr addrspace(1) @ascast_0_0_gep(ptr %p) nounwind {
; CHECK-LABEL: @ascast_0_0_gep(
; CHECK-NEXT:    [[X:%.*]] = addrspacecast ptr [[P:%.*]] to ptr addrspace(1)
; CHECK-NEXT:    ret ptr addrspace(1) [[X]]
;
  %x = addrspacecast ptr %p to ptr addrspace(1)
  ret ptr addrspace(1) %x
}

define <2 x ptr> @PR32414(ptr %ptr) {
; CHECK-LABEL: @PR32414(
; CHECK-NEXT:    [[T1:%.*]] = getelementptr inbounds i32, ptr [[PTR:%.*]], <2 x i64> <i64 0, i64 1>
; CHECK-NEXT:    ret <2 x ptr> [[T1]]
;
  %t1 = getelementptr inbounds i32, ptr %ptr, <2 x i64> <i64 0, i64 1>
  ret <2 x ptr> %t1
}

define ptr @test_bitcast_nzgep(ptr %base, i64 %idx) {
; CHECK-LABEL: @test_bitcast_nzgep(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr inbounds i32, ptr [[BASE:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %ptr = getelementptr inbounds i32, ptr %base, i64 %idx
  ret ptr %ptr
}

define ptr @test_zgep_nzgep(ptr %base, i64 %idx) {
; CHECK-LABEL: @test_zgep_nzgep(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr inbounds i32, ptr [[BASE:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %ptr = getelementptr inbounds i32, ptr %base, i64 %idx
  ret ptr %ptr
}

define ptr @test_nzgep_zgep(ptr %base, i64 %idx) {
; CHECK-LABEL: @test_nzgep_zgep(
; CHECK-NEXT:    [[BASE2:%.*]] = getelementptr inbounds [1 x i32], ptr [[BASE:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT:    ret ptr [[BASE2]]
;
  %base2 = getelementptr inbounds [1 x i32], ptr %base, i64 %idx
  ret ptr %base2
}

define ptr @test_gep_inbounds_of_gep(ptr %base) {
; CHECK-LABEL: @test_gep_inbounds_of_gep(
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[BASE:%.*]], i64 32
; CHECK-NEXT:    ret ptr [[PTR2]]
;
  %ptr1 = getelementptr i32, ptr %base, i64 4
  %ptr2 = getelementptr inbounds i32, ptr %ptr1, i64 4
  ret ptr %ptr2
}

%struct.f = type { i32 }

@g0 = internal unnamed_addr constant %struct.f zeroinitializer, align 4
@g1 = internal unnamed_addr constant %struct.f { i32 -1 }, align 4

define ptr @PR45084(i1 %cond) {
; CHECK-LABEL: @PR45084(
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[COND:%.*]], ptr @g0, ptr @g1, !prof [[PROF0:![0-9]+]]
; CHECK-NEXT:    ret ptr [[SEL]]
;
  %sel = select i1 %cond, ptr @g0, ptr @g1, !prof !0
  ret ptr %sel
}

define ptr @PR45084_extra_use(i1 %cond, ptr %p) {
; CHECK-LABEL: @PR45084_extra_use(
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[COND:%.*]], ptr @g0, ptr @g1
; CHECK-NEXT:    store ptr [[SEL]], ptr [[P:%.*]], align 8
; CHECK-NEXT:    ret ptr [[SEL]]
;
  %sel = select i1 %cond, ptr @g0, ptr @g1
  store ptr %sel, ptr %p
  ret ptr %sel
}

define ptr @gep_null_inbounds(i64 %idx) {
; CHECK-LABEL: @gep_null_inbounds(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i8, ptr null, i64 [[IDX:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep = getelementptr inbounds i8, ptr null, i64 %idx
  ret ptr %gep
}

define ptr @gep_null_not_inbounds(i64 %idx) {
; CHECK-LABEL: @gep_null_not_inbounds(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr null, i64 [[IDX:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep = getelementptr i8, ptr null, i64 %idx
  ret ptr %gep
}

define ptr @gep_null_defined(i64 %idx) null_pointer_is_valid {
; CHECK-LABEL: @gep_null_defined(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i8, ptr null, i64 [[IDX:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep = getelementptr inbounds i8, ptr null, i64 %idx
  ret ptr %gep
}

define ptr @gep_null_inbounds_different_type(i64 %idx1, i64 %idx2) {
; CHECK-LABEL: @gep_null_inbounds_different_type(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [0 x i8], ptr null, i64 0, i64 [[IDX2:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep = getelementptr inbounds [0 x i8], ptr null, i64 %idx1, i64 %idx2
  ret ptr %gep
}

define ptr @D98588(ptr %c1, i64 %offset) {
; CHECK-LABEL: @D98588(
; CHECK-NEXT:    [[C2_NEXT_IDX:%.*]] = shl nsw i64 [[OFFSET:%.*]], 3
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i8, ptr [[C1:%.*]], i64 [[C2_NEXT_IDX]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %c2_next = getelementptr inbounds i64, ptr %c1, i64 %offset
  %ptrtoint1 = ptrtoint ptr %c1 to i64
  %ptrtoint2 = ptrtoint ptr %c2_next to i64
  %sub = sub i64 %ptrtoint2, %ptrtoint1   ; C2 - C1
  %gep = getelementptr inbounds i8, ptr %c1, i64 %sub   ; C1 + (C2 - C1)
  ret ptr %gep
}

declare noalias ptr @malloc(i64) nounwind allockind("alloc,uninitialized") allocsize(0)

define i32 @test_gep_bitcast_malloc(ptr %a) {
; CHECK-LABEL: @test_gep_bitcast_malloc(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CALL:%.*]] = call noalias dereferenceable_or_null(16) ptr @malloc(i64 16)
; CHECK-NEXT:    [[G3:%.*]] = getelementptr i8, ptr [[CALL]], i64 12
; CHECK-NEXT:    [[A_C:%.*]] = load i32, ptr [[G3]], align 4
; CHECK-NEXT:    ret i32 [[A_C]]
;
entry:
  %call = call noalias ptr @malloc(i64 16) #2
  %g3 = getelementptr %struct.A, ptr %call, i32 0, i32 2
  %a_c = load i32, ptr %g3, align 4
  ret i32 %a_c
}

define ptr @gep_of_gep_multiuse_const_and_const(ptr %p, i64 %idx) {
; CHECK-LABEL: @gep_of_gep_multiuse_const_and_const(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 8
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr i8, ptr [[P]], i64 12
; CHECK-NEXT:    ret ptr [[GEP2]]
;
  %gep1 = getelementptr { i32, i32 }, ptr %p, i64 1
  call void @use(ptr %gep1)
  %gep2 = getelementptr { i32, i32 }, ptr %gep1, i64 0, i32 1
  ret ptr %gep2
}

define ptr @gep_of_gep_multiuse_var_and_const(ptr %p, i64 %idx) {
; CHECK-LABEL: @gep_of_gep_multiuse_var_and_const(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr { i32, i32 }, ptr [[P:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr i8, ptr [[GEP1]], i64 4
; CHECK-NEXT:    ret ptr [[GEP2]]
;
  %gep1 = getelementptr { i32, i32 }, ptr %p, i64 %idx
  call void @use(ptr %gep1)
  %gep2 = getelementptr { i32, i32 }, ptr %gep1, i64 0, i32 1
  ret ptr %gep2
}

define ptr @gep_of_gep_multiuse_var_and_var(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_of_gep_multiuse_var_and_var(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr [4 x i32], ptr [[P:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr [4 x i32], ptr [[P]], i64 [[IDX]], i64 [[IDX2:%.*]]
; CHECK-NEXT:    ret ptr [[GEP2]]
;
  %gep1 = getelementptr [4 x i32], ptr %p, i64 %idx
  call void @use(ptr %gep1)
  %gep2 = getelementptr [4 x i32], ptr %gep1, i64 0, i64 %idx2
  ret ptr %gep2
}

@g_i32_di = global i32 0
@g_i32_e = external global i32
@g_i32_ew = extern_weak global i32
@g_0xi8_e = external global [0 x i8]

define ptr @const_gep_global_di_i8_smaller() {
; CHECK-LABEL: @const_gep_global_di_i8_smaller(
; CHECK-NEXT:    ret ptr getelementptr inbounds nuw (i8, ptr @g_i32_di, i64 3)
;
  ret ptr getelementptr (i8, ptr @g_i32_di, i64 3)
}

define ptr @const_gep_global_di_i8_exact() {
; CHECK-LABEL: @const_gep_global_di_i8_exact(
; CHECK-NEXT:    ret ptr getelementptr inbounds nuw (i8, ptr @g_i32_di, i64 4)
;
  ret ptr getelementptr (i8, ptr @g_i32_di, i64 4)
}

define ptr @const_gep_global_di_i8_larger() {
; CHECK-LABEL: @const_gep_global_di_i8_larger(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_i32_di, i64 5)
;
  ret ptr getelementptr (i8, ptr @g_i32_di, i64 5)
}

define ptr @const_gep_global_di_i64_larger() {
; CHECK-LABEL: @const_gep_global_di_i64_larger(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_i32_di, i64 8)
;
  ret ptr getelementptr (i64, ptr @g_i32_di, i64 1)
}

define ptr @const_gep_global_e_smaller() {
; CHECK-LABEL: @const_gep_global_e_smaller(
; CHECK-NEXT:    ret ptr getelementptr inbounds nuw (i8, ptr @g_i32_e, i64 3)
;
  ret ptr getelementptr (i8, ptr @g_i32_e, i64 3)
}

define ptr @const_gep_global_e_exact() {
; CHECK-LABEL: @const_gep_global_e_exact(
; CHECK-NEXT:    ret ptr getelementptr inbounds nuw (i8, ptr @g_i32_e, i64 4)
;
  ret ptr getelementptr (i8, ptr @g_i32_e, i64 4)
}

define ptr @const_gep_global_e_larger() {
; CHECK-LABEL: @const_gep_global_e_larger(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_i32_e, i64 5)
;
  ret ptr getelementptr (i8, ptr @g_i32_e, i64 5)
}

define ptr @const_gep_global_ew_smaller() {
; CHECK-LABEL: @const_gep_global_ew_smaller(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_i32_ew, i64 3)
;
  ret ptr getelementptr (i8, ptr @g_i32_ew, i64 3)
}

define ptr @const_gep_global_ew_exact() {
; CHECK-LABEL: @const_gep_global_ew_exact(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_i32_ew, i64 4)
;
  ret ptr getelementptr (i8, ptr @g_i32_ew, i64 4)
}

define ptr @const_gep_global_ew_larger() {
; CHECK-LABEL: @const_gep_global_ew_larger(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_i32_ew, i64 5)
;
  ret ptr getelementptr (i8, ptr @g_i32_ew, i64 5)
}

define ptr @const_gep_0xi8_global() {
; CHECK-LABEL: @const_gep_0xi8_global(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g_0xi8_e, i64 10)
;
  ret ptr getelementptr ([0 x i8], ptr @g_0xi8_e, i64 0, i64 10)
}

define ptr @const_gep_chain(ptr %p, i64 %a) {
; CHECK-LABEL: @const_gep_chain(
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i8, ptr [[P:%.*]], i64 [[A:%.*]]
; CHECK-NEXT:    [[P4:%.*]] = getelementptr inbounds nuw i8, ptr [[P1]], i64 6
; CHECK-NEXT:    ret ptr [[P4]]
;
  %p1 = getelementptr inbounds i8, ptr %p, i64 %a
  %p2 = getelementptr inbounds i8, ptr %p1, i64 1
  %p3 = getelementptr inbounds i8, ptr %p2, i64 2
  %p4 = getelementptr inbounds i8, ptr %p3, i64 3
  ret ptr %p4
}

define ptr @gep_sdiv(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_sdiv(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = sdiv exact i64 %off, 7
  %ptr = getelementptr %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_udiv(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_udiv(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = udiv exact i64 %off, 7
  %ptr = getelementptr %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define <2 x ptr> @gep_sdiv_vec(<2 x ptr> %p, <2 x i64> %off) {
; CHECK-LABEL: @gep_sdiv_vec(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i8, <2 x ptr> [[P:%.*]], <2 x i64> [[OFF:%.*]]
; CHECK-NEXT:    ret <2 x ptr> [[PTR]]
;
  %index = sdiv exact <2 x i64> %off, <i64 7, i64 7>
  %ptr = getelementptr %struct.C, <2 x ptr> %p, <2 x i64> %index
  ret <2 x ptr> %ptr
}

define ptr @gep_sdiv_inbounds(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_sdiv_inbounds(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr inbounds i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = sdiv exact i64 %off, 7
  %ptr = getelementptr inbounds %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_sdiv_nuw(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_sdiv_nuw(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr nuw i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = sdiv exact i64 %off, 7
  %ptr = getelementptr nuw %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_ashr(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_ashr(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = ashr exact i64 %off, 2
  %ptr = getelementptr i32, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_lshr(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_lshr(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = lshr exact i64 %off, 2
  %ptr = getelementptr i32, ptr %p, i64 %index
  ret ptr %ptr
}

; Negative tests

define ptr @gep_i8(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_i8(
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[OFF:%.*]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %ptr = getelementptr i8, ptr %p, i64 %off
  ret ptr %ptr
}

define ptr @gep_sdiv_mismatched_size(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_sdiv_mismatched_size(
; CHECK-NEXT:    [[INDEX:%.*]] = sdiv exact i64 [[OFF:%.*]], 20
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr [[STRUCT_C:%.*]], ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = sdiv exact i64 %off, 20
  %ptr = getelementptr %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_udiv_mismatched_size(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_udiv_mismatched_size(
; CHECK-NEXT:    [[INDEX:%.*]] = udiv exact i64 [[OFF:%.*]], 20
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr [[STRUCT_C:%.*]], ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = udiv exact i64 %off, 20
  %ptr = getelementptr %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_sdiv_without_exact(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_sdiv_without_exact(
; CHECK-NEXT:    [[INDEX:%.*]] = sdiv i64 [[OFF:%.*]], 7
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr [[STRUCT_C:%.*]], ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = sdiv i64 %off, 7
  %ptr = getelementptr %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_udiv_without_exact(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_udiv_without_exact(
; CHECK-NEXT:    [[INDEX:%.*]] = udiv i64 [[OFF:%.*]], 7
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr [[STRUCT_C:%.*]], ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = udiv i64 %off, 7
  %ptr = getelementptr %struct.C, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_ashr_without_exact(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_ashr_without_exact(
; CHECK-NEXT:    [[INDEX:%.*]] = ashr i64 [[OFF:%.*]], 2
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = ashr i64 %off, 2
  %ptr = getelementptr i32, ptr %p, i64 %index
  ret ptr %ptr
}

define ptr @gep_lshr_without_exact(ptr %p, i64 %off) {
; CHECK-LABEL: @gep_lshr_without_exact(
; CHECK-NEXT:    [[INDEX:%.*]] = lshr i64 [[OFF:%.*]], 2
; CHECK-NEXT:    [[PTR:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    ret ptr [[PTR]]
;
  %index = lshr i64 %off, 2
  %ptr = getelementptr i32, ptr %p, i64 %index
  ret ptr %ptr
}

define i1 @test_only_used_by_icmp(ptr %a, ptr %b, ptr %c) {
; CHECK-LABEL: @test_only_used_by_icmp(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq ptr [[B:%.*]], [[C:%.*]]
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %pa = ptrtoint ptr %a to i64
  %pb = ptrtoint ptr %b to i64
  %sub = sub i64 %pb, %pa
  %gep = getelementptr i8, ptr %a, i64 %sub
  %cmp = icmp eq ptr %gep, %c
  ret i1 %cmp
}

define i64 @test_only_used_by_ptrtoint(ptr %a, ptr %b) {
; CHECK-LABEL: @test_only_used_by_ptrtoint(
; CHECK-NEXT:    [[VAL:%.*]] = ptrtoint ptr [[B:%.*]] to i64
; CHECK-NEXT:    ret i64 [[VAL]]
;
  %pa = ptrtoint ptr %a to i64
  %pb = ptrtoint ptr %b to i64
  %sub = sub i64 %pb, %pa
  %gep = getelementptr i8, ptr %a, i64 %sub
  %val = ptrtoint ptr %gep to i64
  ret i64 %val
}

define i64 @test_used_by_both(ptr %a, ptr %b, ptr %c) {
; CHECK-LABEL: @test_used_by_both(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq ptr [[B:%.*]], [[C:%.*]]
; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    [[VAL:%.*]] = ptrtoint ptr [[B]] to i64
; CHECK-NEXT:    ret i64 [[VAL]]
; CHECK:       if.else:
; CHECK-NEXT:    ret i64 0
;
  %pa = ptrtoint ptr %a to i64
  %pb = ptrtoint ptr %b to i64
  %sub = sub i64 %pb, %pa
  %gep = getelementptr i8, ptr %a, i64 %sub
  %cmp = icmp eq ptr %gep, %c
  br i1 %cmp, label %if.then, label %if.else
if.then:
  %val = ptrtoint ptr %gep to i64
  ret i64 %val
if.else:
  ret i64 0
}

; Negative tests

define i64 @test_used_by_both_invalid(ptr %a, ptr %b, ptr %c) {
; CHECK-LABEL: @test_used_by_both_invalid(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq ptr [[B:%.*]], [[C:%.*]]
; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    [[PB:%.*]] = ptrtoint ptr [[B]] to i64
; CHECK-NEXT:    [[PA:%.*]] = ptrtoint ptr [[A:%.*]] to i64
; CHECK-NEXT:    [[SUB:%.*]] = sub i64 [[PB]], [[PA]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[A]], i64 [[SUB]]
; CHECK-NEXT:    [[VAL:%.*]] = load i64, ptr [[GEP]], align 8
; CHECK-NEXT:    ret i64 [[VAL]]
; CHECK:       if.else:
; CHECK-NEXT:    ret i64 0
;
  %pa = ptrtoint ptr %a to i64
  %pb = ptrtoint ptr %b to i64
  %sub = sub i64 %pb, %pa
  %gep = getelementptr i8, ptr %a, i64 %sub
  %cmp = icmp eq ptr %gep, %c
  br i1 %cmp, label %if.then, label %if.else
if.then:
  %val = load i64, ptr %gep, align 8
  ret i64 %val
if.else:
  ret i64 0
}


@g = external global i8

define ptr @constexpr_gep_of_gep_with_narrow_type() {
; CHECK-LABEL: @constexpr_gep_of_gep_with_narrow_type(
; CHECK-NEXT:    ret ptr getelementptr (i8, ptr @g, i64 254)
;
  ret ptr getelementptr (i8, ptr getelementptr (i8, ptr @g, i8 127), i8 127)
}

define ptr @gep_to_i8_nusw_nuw(ptr %p) {
; CHECK-LABEL: @gep_to_i8_nusw_nuw(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr nusw nuw i8, ptr [[P:%.*]], i64 4
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep = getelementptr nusw nuw i32, ptr %p, i64 1
  ret ptr %gep
}

define ptr @gep_sel_const(i1 %c) {
; CHECK-LABEL: @gep_sel_const(
; CHECK-NEXT:    [[GEP:%.*]] = select i1 [[C:%.*]], ptr getelementptr (i8, ptr @A, i64 5), ptr getelementptr (i8, ptr @B, i64 5)
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %sel = select i1 %c, ptr @A, ptr @B
  %gep = getelementptr i8, ptr %sel, i64 5
  ret ptr %gep
}

define ptr @gep_sel_const_nuw(i1 %c) {
; CHECK-LABEL: @gep_sel_const_nuw(
; CHECK-NEXT:    [[GEP:%.*]] = select i1 [[C:%.*]], ptr getelementptr nuw (i8, ptr @A, i64 5), ptr getelementptr nuw (i8, ptr @B, i64 5)
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %sel = select i1 %c, ptr @A, ptr @B
  %gep = getelementptr nuw i8, ptr %sel, i64 5
  ret ptr %gep
}

define ptr @gep_of_udiv(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_udiv(
; CHECK-NEXT:    [[TMP1:%.*]] = udiv exact i64 [[X:%.*]], 3
; CHECK-NEXT:    [[R:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = udiv exact i64 %x, 12
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_udiv_fail_not_divisible(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_udiv_fail_not_divisible(
; CHECK-NEXT:    [[IDX:%.*]] = udiv exact i64 [[X:%.*]], 13
; CHECK-NEXT:    [[R:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IDX]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = udiv exact i64 %x, 13
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}


define ptr @gep_of_sdiv(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_sdiv(
; CHECK-NEXT:    [[TMP1:%.*]] = sdiv exact i64 [[X:%.*]], -9
; CHECK-NEXT:    [[R:%.*]] = getelementptr nusw nuw i8, ptr [[P:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = sdiv exact i64 %x, -36
  %r = getelementptr nusw nuw i32, ptr %p, i64 %idx
  ret ptr %r
}


define ptr @gep_of_sdiv_fail_not_divisible(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_sdiv_fail_not_divisible(
; CHECK-NEXT:    [[IDX:%.*]] = sdiv exact i64 [[X:%.*]], -35
; CHECK-NEXT:    [[R:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IDX]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = sdiv exact i64 %x, -35
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_sdiv_fail_ub(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_sdiv_fail_ub(
; CHECK-NEXT:    [[IDX:%.*]] = sdiv i64 [[X:%.*]], -4
; CHECK-NEXT:    [[R:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IDX]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = sdiv i64 %x, -4
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_lshr(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_lshr(
; CHECK-NEXT:    [[TMP1:%.*]] = lshr exact i64 [[X:%.*]], 1
; CHECK-NEXT:    [[R:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = lshr exact i64 %x, 3
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_ashr(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_ashr(
; CHECK-NEXT:    [[TMP1:%.*]] = ashr exact i64 [[X:%.*]], 1
; CHECK-NEXT:    [[R:%.*]] = getelementptr inbounds i8, ptr [[P:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = ashr exact i64 %x, 3
  %r = getelementptr inbounds i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_ashr_fail_multiuse(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_ashr_fail_multiuse(
; CHECK-NEXT:    [[IDX:%.*]] = ashr exact i64 [[X:%.*]], 3
; CHECK-NEXT:    call void @use.i64(i64 [[IDX]])
; CHECK-NEXT:    [[R:%.*]] = getelementptr inbounds i32, ptr [[P:%.*]], i64 [[IDX]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = ashr exact i64 %x, 3
  call void @use.i64(i64 %idx)
  %r = getelementptr inbounds i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_lshr_fail_missing_exact(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_lshr_fail_missing_exact(
; CHECK-NEXT:    [[IDX:%.*]] = lshr i64 [[X:%.*]], 3
; CHECK-NEXT:    [[R:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IDX]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = lshr i64 %x, 3
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_of_ashr_fail_not_divisible(ptr %p, i64 %x) {
; CHECK-LABEL: @gep_of_ashr_fail_not_divisible(
; CHECK-NEXT:    [[IDX:%.*]] = ashr exact i64 [[X:%.*]], 1
; CHECK-NEXT:    [[R:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IDX]]
; CHECK-NEXT:    ret ptr [[R]]
;
  %idx = ashr exact i64 %x, 1
  %r = getelementptr i32, ptr %p, i64 %idx
  ret ptr %r
}

define ptr @gep_merge_not_nuw(ptr %p, i64 %idx) {
; CHECK-LABEL: @gep_merge_not_nuw(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i8, ptr [[P:%.*]], i64 -1
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %idx.neg = sub i64 0, %idx
  %add = add i64 %idx, -1
  %gep1 = getelementptr inbounds i8, ptr %p, i64 %idx.neg
  %gep = getelementptr inbounds nuw i8, ptr %gep1, i64 %add
  ret ptr %gep
}

define ptr @gep_merge_nuw(ptr %p, i64 %x, i64 %y) {
; CHECK-LABEL: @gep_merge_nuw(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr nuw i8, ptr [[P:%.*]], i64 [[Y:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %sub = sub i64 %y, %x
  %gep1 = getelementptr nuw i8, ptr %p, i64 %x
  %gep = getelementptr nuw i8, ptr %gep1, i64 %sub
  ret ptr %gep
}

define ptr @gep_merge_nuw_only_one1(ptr %p, i64 %x, i64 %y) {
; CHECK-LABEL: @gep_merge_nuw_only_one1(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[Y:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %sub = sub i64 %y, %x
  %gep1 = getelementptr i8, ptr %p, i64 %x
  %gep = getelementptr nuw i8, ptr %gep1, i64 %sub
  ret ptr %gep
}

define ptr @gep_merge_nuw_only_one2(ptr %p, i64 %x, i64 %y) {
; CHECK-LABEL: @gep_merge_nuw_only_one2(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[Y:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %sub = sub i64 %y, %x
  %gep1 = getelementptr nuw i8, ptr %p, i64 %x
  %gep = getelementptr i8, ptr %gep1, i64 %sub
  ret ptr %gep
}

; Cannot preserve nusw, unless we know that the addition x + (y-x)
; does not overflow.
define ptr @gep_merge_nusw(ptr %p, i64 %x, i64 %y) {
; CHECK-LABEL: @gep_merge_nusw(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[P:%.*]], i64 [[Y:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %sub = sub i64 %y, %x
  %gep1 = getelementptr nusw i8, ptr %p, i64 %x
  %gep = getelementptr nusw i8, ptr %gep1, i64 %sub
  ret ptr %gep
}

define ptr @gep_merge_nuw_add_zero(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_merge_nuw_add_zero(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr nuw [2 x i32], ptr [[P:%.*]], i64 [[IDX:%.*]], i64 [[IDX2:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep1 = getelementptr nuw [2 x i32], ptr %p, i64 %idx
  %gep = getelementptr nuw [2 x i32], ptr %gep1, i64 0, i64 %idx2
  ret ptr %gep
}

; Cannot preserve nusw, even if the merge only involves an add with a zero
; index. This is because the whole offset calculation is required to be nsw
; after the merge.
define ptr @gep_merge_nusw_add_zero(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_merge_nusw_add_zero(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr [2 x i32], ptr [[P:%.*]], i64 [[IDX:%.*]], i64 [[IDX2:%.*]]
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep1 = getelementptr nusw [2 x i32], ptr %p, i64 %idx
  %gep = getelementptr nusw [2 x i32], ptr %gep1, i64 0, i64 %idx2
  ret ptr %gep
}

define ptr @gep_merge_nuw_const(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_merge_nuw_const(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr nuw [2 x i32], ptr [[P:%.*]], i64 [[IDX:%.*]], i64 1
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep1 = getelementptr nuw [2 x i32], ptr %p, i64 %idx
  %gep = getelementptr nuw i8, ptr %gep1, i64 4
  ret ptr %gep
}

define ptr @gep_merge_nuw_const_neg(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_merge_nuw_const_neg(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr nuw [2 x i32], ptr [[P:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr nuw i8, ptr [[GEP1]], i64 -4
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep1 = getelementptr nuw [2 x i32], ptr %p, i64 %idx
  %gep = getelementptr nuw i8, ptr %gep1, i64 -4
  ret ptr %gep
}

; Cannot preserve nusw, because we don't know that the new offset calculation
; does not overflow.
define ptr @gep_merge_nusw_const(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_merge_nusw_const(
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr [2 x i32], ptr [[P:%.*]], i64 [[IDX:%.*]], i64 1
; CHECK-NEXT:    ret ptr [[GEP]]
;
  %gep1 = getelementptr nusw [2 x i32], ptr %p, i64 %idx
  %gep = getelementptr nusw i8, ptr %gep1, i64 4
  ret ptr %gep
}


!0 = !{!"branch_weights", i32 2, i32 10}