llvm/test/Transforms/InstCombine/cast_ptr.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Tests to make sure elimination of casts is working correctly
; RUN: opt < %s -instcombine -S | FileCheck %s

target datalayout = "p:32:32-p1:32:32-p2:16:16"

@global = global i8 0

; This shouldn't convert to getelementptr because the relationship
; between the arithmetic and the layout of allocated memory is
; entirely unknown.

define i8* @test1(i8* %t) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    [[TC:%.*]] = ptrtoint i8* [[T:%.*]] to i32
; CHECK-NEXT:    [[TA:%.*]] = add i32 [[TC]], 32
; CHECK-NEXT:    [[TV:%.*]] = inttoptr i32 [[TA]] to i8*
; CHECK-NEXT:    ret i8* [[TV]]
;
  %tc = ptrtoint i8* %t to i32
  %ta = add i32 %tc, 32
  %tv = inttoptr i32 %ta to i8*
  ret i8* %tv
}

; These casts should be folded away.

define i1 @test2(i8* %a, i8* %b) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[R]]
;
  %ta = ptrtoint i8* %a to i32
  %tb = ptrtoint i8* %b to i32
  %r = icmp eq i32 %ta, %tb
  ret i1 %r
}

; These casts should be folded away.

define i1 @test2_as2_same_int(i8 addrspace(2)* %a, i8 addrspace(2)* %b) {
; CHECK-LABEL: @test2_as2_same_int(
; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 addrspace(2)* [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[R]]
;
  %ta = ptrtoint i8 addrspace(2)* %a to i16
  %tb = ptrtoint i8 addrspace(2)* %b to i16
  %r = icmp eq i16 %ta, %tb
  ret i1 %r
}

; These casts should be folded away.

define i1 @test2_as2_larger(i8 addrspace(2)* %a, i8 addrspace(2)* %b) {
; CHECK-LABEL: @test2_as2_larger(
; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 addrspace(2)* [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[R]]
;
  %ta = ptrtoint i8 addrspace(2)* %a to i32
  %tb = ptrtoint i8 addrspace(2)* %b to i32
  %r = icmp eq i32 %ta, %tb
  ret i1 %r
}

; These casts should not be folded away.

define i1 @test2_diff_as(i8* %p, i8 addrspace(1)* %q) {
; CHECK-LABEL: @test2_diff_as(
; CHECK-NEXT:    [[I0:%.*]] = ptrtoint i8* [[P:%.*]] to i32
; CHECK-NEXT:    [[I1:%.*]] = ptrtoint i8 addrspace(1)* [[Q:%.*]] to i32
; CHECK-NEXT:    [[R0:%.*]] = icmp sge i32 [[I0]], [[I1]]
; CHECK-NEXT:    ret i1 [[R0]]
;
  %i0 = ptrtoint i8* %p to i32
  %i1 = ptrtoint i8 addrspace(1)* %q to i32
  %r0 = icmp sge i32 %i0, %i1
  ret i1 %r0
}

; These casts should not be folded away.

define i1 @test2_diff_as_global(i8 addrspace(1)* %q) {
; CHECK-LABEL: @test2_diff_as_global(
; CHECK-NEXT:    [[I1:%.*]] = ptrtoint i8 addrspace(1)* [[Q:%.*]] to i32
; CHECK-NEXT:    [[R0:%.*]] = icmp sge i32 [[I1]], ptrtoint (i8* @global to i32)
; CHECK-NEXT:    ret i1 [[R0]]
;
  %i0 = ptrtoint i8* @global to i32
  %i1 = ptrtoint i8 addrspace(1)* %q to i32
  %r0 = icmp sge i32 %i1, %i0
  ret i1 %r0
}

; These casts should also be folded away.

define i1 @test3(i8* %a) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A:%.*]], @global
; CHECK-NEXT:    ret i1 [[R]]
;
  %ta = ptrtoint i8* %a to i32
  %r = icmp eq i32 %ta, ptrtoint (i8* @global to i32)
  ret i1 %r
}

define i1 @test4(i32 %A) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i32 [[A:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = inttoptr i32 %A to i8*
  %C = icmp eq i8* %B, null
  ret i1 %C
}

define i1 @test4_as2(i16 %A) {
; CHECK-LABEL: @test4_as2(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i16 [[A:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = inttoptr i16 %A to i8 addrspace(2)*
  %C = icmp eq i8 addrspace(2)* %B, null
  ret i1 %C
}


; Pulling the cast out of the load allows us to eliminate the load, and then
; the whole array.

  %op = type { float }
  %unop = type { i32 }
@Array = internal constant [1 x %op* (%op*)*] [ %op* (%op*)* @foo ]

declare %op* @foo(%op* %X)

define %unop* @test5(%op* %O) {
; CHECK-LABEL: @test5(
; CHECK-NEXT:    [[T_2:%.*]] = call %op* @foo(%op* [[O:%.*]])
; CHECK-NEXT:    [[TMP1:%.*]] = bitcast %op* [[T_2]] to %unop*
; CHECK-NEXT:    ret %unop* [[TMP1]]
;
  %t = load %unop* (%op*)*, %unop* (%op*)** bitcast ([1 x %op* (%op*)*]* @Array to %unop* (%op*)**); <%unop* (%op*)*> [#uses=1]
  %t.2 = call %unop* %t( %op* %O )
  ret %unop* %t.2
}



; InstCombine can not 'load (cast P)' -> cast (load P)' if the cast changes
; the address space.

define i8 @test6(i8 addrspace(1)* %source) {
; CHECK-LABEL: @test6(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ARRAYIDX223:%.*]] = addrspacecast i8 addrspace(1)* [[SOURCE:%.*]] to i8*
; CHECK-NEXT:    [[T4:%.*]] = load i8, i8* [[ARRAYIDX223]], align 1
; CHECK-NEXT:    ret i8 [[T4]]
;
entry:
  %arrayidx223 = addrspacecast i8 addrspace(1)* %source to i8*
  %t4 = load i8, i8* %arrayidx223
  ret i8 %t4
}

define <2 x i32> @insertelt(<2 x i32> %x, i32* %p, i133 %index) {
; CHECK-LABEL: @insertelt(
; CHECK-NEXT:    [[TMP1:%.*]] = ptrtoint i32* [[P:%.*]] to i32
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x i32> [[X:%.*]], i32 [[TMP1]], i133 [[INDEX:%.*]]
; CHECK-NEXT:    ret <2 x i32> [[R]]
;
  %v = inttoptr <2 x i32> %x to <2 x i32*>
  %i = insertelement <2 x i32*> %v, i32* %p, i133 %index
  %r = ptrtoint <2 x i32*> %i to <2 x i32>
  ret <2 x i32> %r
}

define <2 x i32> @insertelt_intptr_trunc(<2 x i64> %x, i32* %p) {
; CHECK-LABEL: @insertelt_intptr_trunc(
; CHECK-NEXT:    [[TMP1:%.*]] = trunc <2 x i64> [[X:%.*]] to <2 x i32>
; CHECK-NEXT:    [[TMP2:%.*]] = ptrtoint i32* [[P:%.*]] to i32
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x i32> [[TMP1]], i32 [[TMP2]], i32 0
; CHECK-NEXT:    ret <2 x i32> [[R]]
;
  %v = inttoptr <2 x i64> %x to <2 x i32*>
  %i = insertelement <2 x i32*> %v, i32* %p, i32 0
  %r = ptrtoint <2 x i32*> %i to <2 x i32>
  ret <2 x i32> %r
}

define <2 x i32> @insertelt_intptr_zext(<2 x i8> %x, i32* %p) {
; CHECK-LABEL: @insertelt_intptr_zext(
; CHECK-NEXT:    [[TMP1:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i32>
; CHECK-NEXT:    [[TMP2:%.*]] = ptrtoint i32* [[P:%.*]] to i32
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x i32> [[TMP1]], i32 [[TMP2]], i32 1
; CHECK-NEXT:    ret <2 x i32> [[R]]
;
  %v = inttoptr <2 x i8> %x to <2 x i32*>
  %i = insertelement <2 x i32*> %v, i32* %p, i32 1
  %r = ptrtoint <2 x i32*> %i to <2 x i32>
  ret <2 x i32> %r
}

define <2 x i64> @insertelt_intptr_zext_zext(<2 x i8> %x, i32* %p) {
; CHECK-LABEL: @insertelt_intptr_zext_zext(
; CHECK-NEXT:    [[TMP1:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i32>
; CHECK-NEXT:    [[TMP2:%.*]] = ptrtoint i32* [[P:%.*]] to i32
; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <2 x i32> [[TMP1]], i32 [[TMP2]], i32 0
; CHECK-NEXT:    [[R:%.*]] = zext <2 x i32> [[TMP3]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[R]]
;
  %v = inttoptr <2 x i8> %x to <2 x i32*>
  %i = insertelement <2 x i32*> %v, i32* %p, i32 0
  %r = ptrtoint <2 x i32*> %i to <2 x i64>
  ret <2 x i64> %r
}

declare void @use(<2 x i32*>)

define <2 x i32> @insertelt_extra_use1(<2 x i32> %x, i32* %p) {
; CHECK-LABEL: @insertelt_extra_use1(
; CHECK-NEXT:    [[V:%.*]] = inttoptr <2 x i32> [[X:%.*]] to <2 x i32*>
; CHECK-NEXT:    call void @use(<2 x i32*> [[V]])
; CHECK-NEXT:    [[TMP1:%.*]] = ptrtoint i32* [[P:%.*]] to i32
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x i32> [[X]], i32 [[TMP1]], i32 0
; CHECK-NEXT:    ret <2 x i32> [[R]]
;
  %v = inttoptr <2 x i32> %x to <2 x i32*>
  call void @use(<2 x i32*> %v)
  %i = insertelement <2 x i32*> %v, i32* %p, i32 0
  %r = ptrtoint <2 x i32*> %i to <2 x i32>
  ret <2 x i32> %r
}

define <2 x i32> @insertelt_extra_use2(<2 x i32> %x, i32* %p) {
; CHECK-LABEL: @insertelt_extra_use2(
; CHECK-NEXT:    [[V:%.*]] = inttoptr <2 x i32> [[X:%.*]] to <2 x i32*>
; CHECK-NEXT:    [[I:%.*]] = insertelement <2 x i32*> [[V]], i32* [[P:%.*]], i32 0
; CHECK-NEXT:    call void @use(<2 x i32*> [[I]])
; CHECK-NEXT:    [[R:%.*]] = ptrtoint <2 x i32*> [[I]] to <2 x i32>
; CHECK-NEXT:    ret <2 x i32> [[R]]
;
  %v = inttoptr <2 x i32> %x to <2 x i32*>
  %i = insertelement <2 x i32*> %v, i32* %p, i32 0
  call void @use(<2 x i32*> %i)
  %r = ptrtoint <2 x i32*> %i to <2 x i32>
  ret <2 x i32> %r
}