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-rw-r--r--test/Transforms/DeadStoreElimination/X86/gather-null-pointer.ll21
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/X86/gather-null-pointer.ll b/test/Transforms/DeadStoreElimination/X86/gather-null-pointer.ll
new file mode 100644
index 000000000000..6a5f4bb9eb25
--- /dev/null
+++ b/test/Transforms/DeadStoreElimination/X86/gather-null-pointer.ll
@@ -0,0 +1,21 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -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, i32* %arg1) {
+; CHECK-LABEL: @bar(
+; CHECK-NEXT: bb:
+; CHECK-NEXT: store i32 5, i32* [[ARG1:%.*]]
+; CHECK-NEXT: [[TMP:%.*]] = tail call <4 x i32> @llvm.x86.avx2.gather.d.d(<4 x i32> zeroinitializer, i8* null, <4 x i32> [[ARG:%.*]], <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, i8 1)
+; CHECK-NEXT: store i32 10, i32* [[ARG1]]
+; CHECK-NEXT: ret <4 x i32> [[TMP]]
+;
+bb:
+ store i32 5, i32* %arg1
+ %tmp = tail call <4 x i32> @llvm.x86.avx2.gather.d.d(<4 x i32> zeroinitializer, i8* null, <4 x i32> %arg, <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, i8 1)
+ store i32 10, i32* %arg1
+ ret <4 x i32> %tmp
+}
+
+declare <4 x i32> @llvm.x86.avx2.gather.d.d(<4 x i32>, i8*, <4 x i32>, <4 x i32>, i8)