diff options
Diffstat (limited to 'test/Transforms/DeadStoreElimination/cs-cs-aliasing.ll')
-rw-r--r-- | test/Transforms/DeadStoreElimination/cs-cs-aliasing.ll | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/cs-cs-aliasing.ll b/test/Transforms/DeadStoreElimination/cs-cs-aliasing.ll new file mode 100644 index 0000000..8953f9c --- /dev/null +++ b/test/Transforms/DeadStoreElimination/cs-cs-aliasing.ll @@ -0,0 +1,74 @@ +; RUN: opt -basicaa -dse -S < %s | FileCheck %s +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +%class.basic_string = type { %"class.__gnu_cxx::__versa_string" } +%"class.__gnu_cxx::__versa_string" = type { %"class.__gnu_cxx::__sso_string_base" } +%"class.__gnu_cxx::__sso_string_base" = type { %"struct.__gnu_cxx::__vstring_utility<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider", i64, %union.anon } +%"struct.__gnu_cxx::__vstring_utility<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* } +%union.anon = type { i64, [8 x i8] } + +; Function Attrs: nounwind +declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #0 + +; Function Attrs: noinline nounwind readonly uwtable +declare zeroext i1 @callee_takes_string(%class.basic_string* nonnull) #1 align 2 + +; Function Attrs: nounwind uwtable +define weak_odr zeroext i1 @test() #2 align 2 { + +; CHECK-LABEL: @test + +bb: + %tmp = alloca %class.basic_string, align 8 + %tmp1 = alloca %class.basic_string, align 8 + %tmp3 = getelementptr inbounds %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 2 + %tmp4 = bitcast %union.anon* %tmp3 to i8* + %tmp5 = getelementptr inbounds %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 0, i32 0 + %tmp6 = getelementptr inbounds %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 1 + %tmp7 = getelementptr inbounds i8* %tmp4, i64 1 + %tmp8 = bitcast %class.basic_string* %tmp to i8* + %tmp9 = bitcast i64 0 to i64 + %tmp10 = getelementptr inbounds %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 2 + %tmp11 = bitcast %union.anon* %tmp10 to i8* + %tmp12 = getelementptr inbounds %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 0, i32 0 + %tmp13 = getelementptr inbounds %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 1 + %tmp14 = getelementptr inbounds i8* %tmp11, i64 1 + %tmp15 = bitcast %class.basic_string* %tmp1 to i8* + br label %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit + +_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit: ; preds = %bb + store i8* %tmp4, i8** %tmp5, align 8 + store i8 62, i8* %tmp4, align 8 + store i64 1, i64* %tmp6, align 8 + store i8 0, i8* %tmp7, align 1 + %tmp16 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp) + br label %_ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3 + +_ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3: ; preds = %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit + +; CHECK: _ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3: + +; The following can be read through the call %tmp17: + store i8* %tmp11, i8** %tmp12, align 8 + store i8 125, i8* %tmp11, align 8 + store i64 1, i64* %tmp13, align 8 + store i8 0, i8* %tmp14, align 1 + +; CHECK: store i8* %tmp11, i8** %tmp12, align 8 +; CHECK: store i8 125, i8* %tmp11, align 8 +; CHECK: store i64 1, i64* %tmp13, align 8 +; CHECK: store i8 0, i8* %tmp14, align 1 + + %tmp17 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp1) + call void @llvm.memset.p0i8.i64(i8* %tmp11, i8 -51, i64 16, i32 8, i1 false) #0 + call void @llvm.memset.p0i8.i64(i8* %tmp15, i8 -51, i64 32, i32 8, i1 false) #0 + call void @llvm.memset.p0i8.i64(i8* %tmp4, i8 -51, i64 16, i32 8, i1 false) #0 + call void @llvm.memset.p0i8.i64(i8* %tmp8, i8 -51, i64 32, i32 8, i1 false) #0 + ret i1 %tmp17 +} + +attributes #0 = { nounwind } +attributes #1 = { noinline nounwind readonly uwtable } +attributes #2 = { nounwind uwtable } + |