File: gather-null-pointer.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=dse -S | FileCheck %s

; Both stores should be emitted because we can't tell if the gather aliases.

define <4 x i32> @bar(<4 x i32> %arg, ptr %arg1) {
; CHECK-LABEL: @bar(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    store i32 5, ptr [[ARG1:%.*]], align 4
; CHECK-NEXT:    [[TMP:%.*]] = tail call <4 x i32> @llvm.x86.avx2.gather.d.d(<4 x i32> zeroinitializer, ptr null, <4 x i32> [[ARG:%.*]], <4 x i32> splat (i32 -1), i8 1)
; CHECK-NEXT:    store i32 10, ptr [[ARG1]], align 4
; CHECK-NEXT:    ret <4 x i32> [[TMP]]
;
bb:
  store i32 5, ptr %arg1
  %tmp = tail call <4 x i32> @llvm.x86.avx2.gather.d.d(<4 x i32> zeroinitializer, ptr null, <4 x i32> %arg, <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, i8 1)
  store i32 10, ptr %arg1
  ret <4 x i32> %tmp
}

declare <4 x i32> @llvm.x86.avx2.gather.d.d(<4 x i32>, ptr, <4 x i32>, <4 x i32>, i8)