diff options
| -rw-r--r-- | clang/lib/CodeGen/CGExpr.cpp | 4 | ||||
| -rw-r--r-- | clang/test/CodeGen/tbaa-vec.cpp | 20 |
2 files changed, 22 insertions, 2 deletions
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp index bff3fcf6db2..2b0086d22a7 100644 --- a/clang/lib/CodeGen/CGExpr.cpp +++ b/clang/lib/CodeGen/CGExpr.cpp @@ -3665,8 +3665,9 @@ LValue CodeGenFunction::EmitLValueForField(LValue base, getFieldAlignmentSource(BaseInfo.getAlignmentSource()); LValueBaseInfo FieldBaseInfo(fieldAlignSource, BaseInfo.getMayAlias()); + QualType type = field->getType(); const RecordDecl *rec = field->getParent(); - if (rec->isUnion() || rec->hasAttr<MayAliasAttr>()) + if (rec->isUnion() || rec->hasAttr<MayAliasAttr>() || type->isVectorType()) FieldBaseInfo.setMayAlias(true); bool mayAlias = FieldBaseInfo.getMayAlias(); @@ -3691,7 +3692,6 @@ LValue CodeGenFunction::EmitLValueForField(LValue base, return LValue::MakeBitfield(Addr, Info, fieldType, FieldBaseInfo); } - QualType type = field->getType(); Address addr = base.getAddress(); unsigned cvr = base.getVRQualifiers(); bool TBAAPath = CGM.getCodeGenOpts().StructPathTBAA; diff --git a/clang/test/CodeGen/tbaa-vec.cpp b/clang/test/CodeGen/tbaa-vec.cpp new file mode 100644 index 00000000000..5f61b934f00 --- /dev/null +++ b/clang/test/CodeGen/tbaa-vec.cpp @@ -0,0 +1,20 @@ +// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s +// Test TBAA metadata generated by front-end (vector types are always treated as mayalias). + +typedef float __m128 __attribute__ ((__vector_size__ (16))); + +struct A { + __m128 a, b; +}; + +void foo(A *a, __m128 v) { + // CHECK-LABEL: define void @_Z3fooP1ADv4_f + a->a = v; + // CHECK: store <4 x float> %v, <4 x float>* %{{.*}}, align 16, !tbaa [[TAG_char:!.*]] + // CHECK: store <4 x float> %{{.*}}, <4 x float>* %{{.*}}, align 16, !tbaa [[TAG_char]] +} + +// CHECK: [[TYPE_char:!.*]] = !{!"omnipotent char", [[TAG_cxx_tbaa:!.*]], +// CHECK: [[TAG_cxx_tbaa]] = !{!"Simple C++ TBAA"} +// CHECK: [[TAG_char]] = !{[[TYPE_char]], [[TYPE_char]], i64 0} + |
