test/Transforms/StraightLineStrengthReduce/slsr-gep.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt < %s -passes=slsr,gvn -S | FileCheck %s

target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64-p:64:64:64-p1:32:32:32-p2:128:128:128:32"

; foo(input[0]);
; foo(input[s]);
; foo(input[s * 2]);
;   =>
; p0 = &input[0];
; foo(*p);
; p1 = p0 + s;
; foo(*p1);
; p2 = p1 + s;
; foo(*p2);
define void @slsr_gep(ptr %input, i64 %s) {
; CHECK-LABEL: define void @slsr_gep(
; CHECK-SAME: ptr [[INPUT:%.*]], i64 [[S:%.*]]) {
; CHECK-NEXT:    call void @foo(ptr [[INPUT]])
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i64 [[S]]
; CHECK-NEXT:    call void @foo(ptr [[P1]])
; CHECK-NEXT:    [[TMP1:%.*]] = shl i64 [[S]], 2
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[TMP1]]
; CHECK-NEXT:    call void @foo(ptr [[P2]])
; CHECK-NEXT:    ret void
;
  ; v0 = input[0];
  call void @foo(ptr %input)

  ; v1 = input[s];
  %p1 = getelementptr inbounds i32, ptr %input, i64 %s
  call void @foo(ptr %p1)

  ; v2 = input[s * 2];
  %s2 = shl nsw i64 %s, 1
  %p2 = getelementptr inbounds i32, ptr %input, i64 %s2
  call void @foo(ptr %p2)

  ret void
}

; foo(input[0]);
; foo(input[(long)s]);
; foo(input[(long)(s * 2)]);
;   =>
; p0 = &input[0];
; foo(*p);
; p1 = p0 + (long)s;
; foo(*p1);
; p2 = p1 + (long)s;
; foo(*p2);
define void @slsr_gep_sext(ptr %input, i32 %s) {
; CHECK-LABEL: define void @slsr_gep_sext(
; CHECK-SAME: ptr [[INPUT:%.*]], i32 [[S:%.*]]) {
; CHECK-NEXT:    call void @foo(ptr [[INPUT]])
; CHECK-NEXT:    [[T:%.*]] = sext i32 [[S]] to i64
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i64 [[T]]
; CHECK-NEXT:    call void @foo(ptr [[P1]])
; CHECK-NEXT:    [[TMP1:%.*]] = shl i64 [[T]], 2
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[TMP1]]
; CHECK-NEXT:    call void @foo(ptr [[P2]])
; CHECK-NEXT:    ret void
;
  ; v0 = input[0];
  call void @foo(ptr %input)

  ; v1 = input[s];
  %t = sext i32 %s to i64
  %p1 = getelementptr inbounds i32, ptr %input, i64 %t
  call void @foo(ptr %p1)

  ; v2 = input[s * 2];
  %s2 = shl nsw i32 %s, 1
  %t2 = sext i32 %s2 to i64
  %p2 = getelementptr inbounds i32, ptr %input, i64 %t2
  call void @foo(ptr %p2)

  ret void
}

; int input[10][5];
; foo(input[s][t]);
; foo(input[s * 2][t]);
; foo(input[s * 3][t]);
;   =>
; p0 = &input[s][t];
; foo(*p0);
; p1 = p0 + 5s;
; foo(*p1);
; p2 = p1 + 5s;
; foo(*p2);
define void @slsr_gep_2d(ptr %input, i64 %s, i64 %t) {
; CHECK-LABEL: define void @slsr_gep_2d(
; CHECK-SAME: ptr [[INPUT:%.*]], i64 [[S:%.*]], i64 [[T:%.*]]) {
; CHECK-NEXT:    [[P0:%.*]] = getelementptr inbounds [10 x [5 x i32]], ptr [[INPUT]], i64 0, i64 [[S]], i64 [[T]]
; CHECK-NEXT:    call void @foo(ptr [[P0]])
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 [[S]], 20
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i8, ptr [[P0]], i64 [[TMP1]]
; CHECK-NEXT:    call void @foo(ptr [[P1]])
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[TMP1]]
; CHECK-NEXT:    call void @foo(ptr [[P2]])
; CHECK-NEXT:    ret void
;
  ; v0 = input[s][t];
  %p0 = getelementptr inbounds [10 x [5 x i32]], ptr %input, i64 0, i64 %s, i64 %t
  call void @foo(ptr %p0)

  ; v1 = input[s * 2][t];
  %s2 = shl nsw i64 %s, 1
  %p1 = getelementptr inbounds [10 x [5 x i32]], ptr %input, i64 0, i64 %s2, i64 %t
  call void @foo(ptr %p1)

  ; v3 = input[s * 3][t];
  %s3 = mul nsw i64 %s, 3
  %p2 = getelementptr inbounds [10 x [5 x i32]], ptr %input, i64 0, i64 %s3, i64 %t
  call void @foo(ptr %p2)

  ret void
}

%struct.S = type <{ i64, i32 }>

; In this case, the bump
;     = (char *)&input[s * 2][t].f1 - (char *)&input[s][t].f1
;     = 60 * s
; which may not be divisible by typeof(input[s][t].f1) = 8. Therefore, we
; rewrite the candidates using byte offset instead of index offset as in
; @slsr_gep_2d.
define void @slsr_gep_uglygep(ptr %input, i64 %s, i64 %t) {
; CHECK-LABEL: define void @slsr_gep_uglygep(
; CHECK-SAME: ptr [[INPUT:%.*]], i64 [[S:%.*]], i64 [[T:%.*]]) {
; CHECK-NEXT:    [[P0:%.*]] = getelementptr inbounds [10 x [5 x %struct.S]], ptr [[INPUT]], i64 0, i64 [[S]], i64 [[T]], i32 0
; CHECK-NEXT:    call void @bar(ptr [[P0]])
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 [[S]], 60
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i8, ptr [[P0]], i64 [[TMP1]]
; CHECK-NEXT:    call void @bar(ptr [[P1]])
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i8, ptr [[P1]], i64 [[TMP1]]
; CHECK-NEXT:    call void @bar(ptr [[P2]])
; CHECK-NEXT:    ret void
;
  ; v0 = input[s][t].f1;
  %p0 = getelementptr inbounds [10 x [5 x %struct.S]], ptr %input, i64 0, i64 %s, i64 %t, i32 0
  call void @bar(ptr %p0)

  ; v1 = input[s * 2][t].f1;
  %s2 = shl nsw i64 %s, 1
  %p1 = getelementptr inbounds [10 x [5 x %struct.S]], ptr %input, i64 0, i64 %s2, i64 %t, i32 0
  call void @bar(ptr %p1)

  ; v2 = input[s * 3][t].f1;
  %s3 = mul nsw i64 %s, 3
  %p2 = getelementptr inbounds [10 x [5 x %struct.S]], ptr %input, i64 0, i64 %s3, i64 %t, i32 0
  call void @bar(ptr %p2)

  ret void
}

define void @slsr_out_of_bounds_gep(ptr %input, i32 %s) {
; CHECK-LABEL: define void @slsr_out_of_bounds_gep(
; CHECK-SAME: ptr [[INPUT:%.*]], i32 [[S:%.*]]) {
; CHECK-NEXT:    call void @foo(ptr [[INPUT]])
; CHECK-NEXT:    [[T:%.*]] = sext i32 [[S]] to i64
; CHECK-NEXT:    [[P1:%.*]] = getelementptr i32, ptr [[INPUT]], i64 [[T]]
; CHECK-NEXT:    call void @foo(ptr [[P1]])
; CHECK-NEXT:    [[TMP1:%.*]] = shl i64 [[T]], 2
; CHECK-NEXT:    [[P2:%.*]] = getelementptr i8, ptr [[P1]], i64 [[TMP1]]
; CHECK-NEXT:    call void @foo(ptr [[P2]])
; CHECK-NEXT:    ret void
;
  ; v0 = input[0];
  call void @foo(ptr %input)

  ; v1 = input[(long)s];
  %t = sext i32 %s to i64
  %p1 = getelementptr i32, ptr %input, i64 %t
  call void @foo(ptr %p1)

  ; v2 = input[(long)(s * 2)];
  %s2 = shl nsw i32 %s, 1
  %t2 = sext i32 %s2 to i64
  %p2 = getelementptr i32, ptr %input, i64 %t2
  call void @foo(ptr %p2)

  ret void
}

define void @slsr_gep_128bit_index(ptr %input, i128 %s) {
; CHECK-LABEL: define void @slsr_gep_128bit_index(
; CHECK-SAME: ptr [[INPUT:%.*]], i128 [[S:%.*]]) {
; CHECK-NEXT:    call void @foo(ptr [[INPUT]])
; CHECK-NEXT:    [[S125:%.*]] = shl nsw i128 [[S]], 125
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i128 [[S125]]
; CHECK-NEXT:    call void @foo(ptr [[P1]])
; CHECK-NEXT:    [[S126:%.*]] = shl nsw i128 [[S]], 126
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i32, ptr [[INPUT]], i128 [[S126]]
; CHECK-NEXT:    call void @foo(ptr [[P2]])
; CHECK-NEXT:    ret void
;
  ; p0 = &input[0]
  call void @foo(ptr %input)

  ; p1 = &input[s << 125]
  %s125 = shl nsw i128 %s, 125
  %p1 = getelementptr inbounds i32, ptr %input, i128 %s125
  call void @foo(ptr %p1)

  ; p2 = &input[s << 126]
  %s126 = shl nsw i128 %s, 126
  %p2 = getelementptr inbounds i32, ptr %input, i128 %s126
  call void @foo(ptr %p2)

  ret void
}

define void @slsr_gep_32bit_pointer(ptr addrspace(1) %input, i64 %s) {
; CHECK-LABEL: define void @slsr_gep_32bit_pointer(
; CHECK-SAME: ptr addrspace(1) [[INPUT:%.*]], i64 [[S:%.*]]) {
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i32, ptr addrspace(1) [[INPUT]], i64 [[S]]
; CHECK-NEXT:    call void @baz(ptr addrspace(1) [[P1]])
; CHECK-NEXT:    [[S2:%.*]] = mul nsw i64 [[S]], 2
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i32, ptr addrspace(1) [[INPUT]], i64 [[S2]]
; CHECK-NEXT:    call void @baz(ptr addrspace(1) [[P2]])
; CHECK-NEXT:    ret void
;
  ; p1 = &input[s]
  %p1 = getelementptr inbounds i32, ptr addrspace(1) %input, i64 %s
  call void @baz(ptr addrspace(1) %p1)

  ; p2 = &input[s * 2]
  %s2 = mul nsw i64 %s, 2
  %p2 = getelementptr inbounds i32, ptr addrspace(1) %input, i64 %s2
  ; %s2 is wider than the pointer size of addrspace(1), so do not factor it.
  call void @baz(ptr addrspace(1) %p2)

  ret void
}

define void @slsr_gep_fat_pointer(ptr addrspace(2) %input, i32 %s) {
  ; p1 = &input[s]
; CHECK-LABEL: define void @slsr_gep_fat_pointer(
; CHECK-SAME: ptr addrspace(2) [[INPUT:%.*]], i32 [[S:%.*]]) {
; CHECK-NEXT:    [[P1:%.*]] = getelementptr inbounds i32, ptr addrspace(2) [[INPUT]], i32 [[S]]
; CHECK-NEXT:    call void @baz2(ptr addrspace(2) [[P1]])
; CHECK-NEXT:    [[TMP1:%.*]] = shl i32 [[S]], 2
; CHECK-NEXT:    [[P2:%.*]] = getelementptr inbounds i8, ptr addrspace(2) [[P1]], i32 [[TMP1]]
; CHECK-NEXT:    call void @baz2(ptr addrspace(2) [[P2]])
; CHECK-NEXT:    ret void
;
  %p1 = getelementptr inbounds i32, ptr addrspace(2) %input, i32 %s
  call void @baz2(ptr addrspace(2) %p1)

  ; p2 = &input[s * 2]
  %s2 = mul nsw i32 %s, 2
  %p2 = getelementptr inbounds i32, ptr addrspace(2) %input, i32 %s2
  ; Use index bitwidth, not pointer size (i128)
  call void @baz2(ptr addrspace(2) %p2)

  ret void
}


declare void @foo(ptr)
declare void @bar(ptr)
declare void @baz(ptr addrspace(1))
declare void @baz2(ptr addrspace(2))