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| author | Tim Northover <tnorthover@apple.com> | 2015-11-09 19:56:35 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2015-11-09 19:56:35 +0000 |
| commit | cc2a6e0608738498cf4e677baf8566460c7083b4 (patch) | |
| tree | 982693aaff11a52f1e880f0c585554781d740391 /clang/lib/CodeGen/CodeGenFunction.h | |
| parent | 9c76869bc33c25d07d5b4ed3eacf310e3f3537cb (diff) | |
| download | llvm-cc2a6e0608738498cf4e677baf8566460c7083b4.zip llvm-cc2a6e0608738498cf4e677baf8566460c7083b4.tar.gz llvm-cc2a6e0608738498cf4e677baf8566460c7083b4.tar.bz2 | |
Atomics: support __c11_* calls on _Atomic struct types.
When a struct's size is not a power of 2, the corresponding _Atomic() type is
promoted to the nearest. We already correctly handled normal C++ expressions of
this form, but direct calls to the __c11_atomic_whatever builtins ended up
performing dodgy operations on the smaller non-atomic types (e.g. memcpy too
much). Later optimisations removed this as undefined behaviour.
This patch converts EmitAtomicExpr to allocate its temporaries at the full
atomic width, sidestepping the issue.
llvm-svn: 252507
Diffstat (limited to 'clang/lib/CodeGen/CodeGenFunction.h')
| -rw-r--r-- | clang/lib/CodeGen/CodeGenFunction.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h index 214fd45..4b0c490 100644 --- a/clang/lib/CodeGen/CodeGenFunction.h +++ b/clang/lib/CodeGen/CodeGenFunction.h @@ -2936,7 +2936,7 @@ public: void EmitLambdaExpr(const LambdaExpr *E, AggValueSlot Dest); - RValue EmitAtomicExpr(AtomicExpr *E, Address Dest = Address::invalid()); + RValue EmitAtomicExpr(AtomicExpr *E); //===--------------------------------------------------------------------===// // Annotations Emission |