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Auto merge of #30962 - Amanieu:non_volatile_atomic, r=alexcrichton

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Rust currently emits atomic loads and stores with the LLVM `volatile` qualifier. This is unnecessary and prevents LLVM from performing optimization on these atomic operations.
This commit is contained in:
bors 2016-02-04 02:46:44 +00:00
commit 1096e7ab7a
1 changed files with 0 additions and 2 deletions
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src/rustllvm/RustWrapper.cpp
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@ -170,7 +170,6 @@ extern "C" LLVMValueRef LLVMBuildAtomicLoad(LLVMBuilderRef B,
AtomicOrdering order,
unsigned alignment) {
LoadInst* li = new LoadInst(unwrap(source),0);
li->setVolatile(true);
li->setAtomic(order);
li->setAlignment(alignment);
return wrap(unwrap(B)->Insert(li, Name));
@ -182,7 +181,6 @@ extern "C" LLVMValueRef LLVMBuildAtomicStore(LLVMBuilderRef B,
AtomicOrdering order,
unsigned alignment) {
StoreInst* si = new StoreInst(unwrap(val),unwrap(target));
si->setVolatile(true);
si->setAtomic(order);
si->setAlignment(alignment);
return wrap(unwrap(B)->Insert(si));