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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-10-14 02:27:24 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-10-14 02:27:24 +0000 |
| commit | fde961dbf36216d457739079adbc0a44712b57ac (patch) | |
| tree | ec549031c40d5411dcb5696463b133eaaed2e884 /clang/test/CodeGenCXX | |
| parent | 4e2bfe0770fdd8154f057552df142126d1f559ae (diff) | |
| download | bcm5719-llvm-fde961dbf36216d457739079adbc0a44712b57ac.tar.gz bcm5719-llvm-fde961dbf36216d457739079adbc0a44712b57ac.zip | |
PR11124: Don't overwrite memory outside of a base class when performing zero-initialization before running its constructor.
llvm-svn: 141933
Diffstat (limited to 'clang/test/CodeGenCXX')
| -rw-r--r-- | clang/test/CodeGenCXX/value-init.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/value-init.cpp b/clang/test/CodeGenCXX/value-init.cpp index 04a18b3fa80..fb981d1ff71 100644 --- a/clang/test/CodeGenCXX/value-init.cpp +++ b/clang/test/CodeGenCXX/value-init.cpp @@ -238,6 +238,25 @@ namespace test6 { // CHECK: ret void } +namespace PR11124 { + // Make sure C::C doesn't overwrite parts of A while it is zero-initializing B + struct A { int a; A(); A(int); }; + struct B : virtual A { int b; }; + struct C : B { C(); }; + C::C() : A(3), B() {} + // CHECK: define void @_ZN7PR111241CC1Ev + // CHECK: call void @llvm.memset.p0i8.i64(i8* {{.*}}, i8 0, i64 12, i32 8, i1 false) + // CHECK-NEXT: call void @_ZN7PR111241BC2Ev + // Make sure C::C doesn't overwrite parts of A while it is zero-initializing B + + struct B2 : virtual A { int B::*b; }; + struct C2 : B2 { C2(); }; + C2::C2() : A(3), B2() {} + // CHECK: define void @_ZN7PR111242C2C1Ev + // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* {{.*}}, i64 16, i32 8, i1 false) + // CHECK-NEXT: call void @_ZN7PR111242B2C2Ev +} + // CHECK: define linkonce_odr void @_ZN8zeroinit2X3IiEC2Ev(%"struct.zeroinit::X3"* %this) unnamed_addr // CHECK: call void @llvm.memset.p0i8.i64 // CHECK-NEXT: call void @_ZN8zeroinit2X2IiEC2Ev |
