diff options
| -rw-r--r-- | lib/Transforms/IPO/FunctionAttrs.cpp | 8 | ||||
| -rw-r--r-- | test/Transforms/FunctionAttrs/2010-10-30-volatile.ll | 10 |
2 files changed, 14 insertions, 4 deletions
diff --git a/lib/Transforms/IPO/FunctionAttrs.cpp b/lib/Transforms/IPO/FunctionAttrs.cpp index d4bce9e48d..39f48145af 100644 --- a/lib/Transforms/IPO/FunctionAttrs.cpp +++ b/lib/Transforms/IPO/FunctionAttrs.cpp @@ -188,12 +188,12 @@ bool FunctionAttrs::AddReadAttrs(const CallGraphSCC &SCC) { continue; } } else if (LoadInst *LI = dyn_cast<LoadInst>(I)) { - // Ignore loads from local memory. - if (PointsToLocalMemory(LI->getPointerOperand())) + // Ignore non-volatile loads from local memory. + if (!LI->isVolatile() && PointsToLocalMemory(LI->getPointerOperand())) continue; } else if (StoreInst *SI = dyn_cast<StoreInst>(I)) { - // Ignore stores to local memory. - if (PointsToLocalMemory(SI->getPointerOperand())) + // Ignore non-volatile stores to local memory. + if (!SI->isVolatile() && PointsToLocalMemory(SI->getPointerOperand())) continue; } diff --git a/test/Transforms/FunctionAttrs/2010-10-30-volatile.ll b/test/Transforms/FunctionAttrs/2010-10-30-volatile.ll new file mode 100644 index 0000000000..f21fabc493 --- /dev/null +++ b/test/Transforms/FunctionAttrs/2010-10-30-volatile.ll @@ -0,0 +1,10 @@ +; RUN: opt < %s -functionattrs -S | FileCheck %s +; PR8279 + +@g = constant i32 1 + +define void @foo() { +; CHECK: void @foo() { + %tmp = volatile load i32* @g + ret void +} |