diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/DeadStoreElimination/merge-stores.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/merge-stores.ll b/test/Transforms/DeadStoreElimination/merge-stores.ll index ad1bc310878..ff1bfaa4d3c 100644 --- a/test/Transforms/DeadStoreElimination/merge-stores.ll +++ b/test/Transforms/DeadStoreElimination/merge-stores.ll @@ -186,6 +186,23 @@ define void @PR34074(i32* %x, i64* %y) { ret void } +; We can't eliminate the last store because P and Q may alias. + +define void @PR36129(i32* %P, i32* %Q) { +; CHECK-LABEL: @PR36129( +; CHECK-NEXT: store i32 1, i32* [[P:%.*]] +; CHECK-NEXT: [[P2:%.*]] = bitcast i32* [[P]] to i8* +; CHECK-NEXT: store i32 2, i32* [[Q:%.*]] +; CHECK-NEXT: store i8 3, i8* [[P2]] +; CHECK-NEXT: ret void +; + store i32 1, i32* %P + %P2 = bitcast i32* %P to i8* + store i32 2, i32* %Q + store i8 3, i8* %P2 + ret void +} + !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 306512)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) !1 = !DIFile(filename: "me.cpp", directory: "/compiler-explorer") !2 = !{} |