diff options
Diffstat (limited to 'contrib/llvm/lib/Transforms/IPO/IPConstantPropagation.cpp')
-rw-r--r-- | contrib/llvm/lib/Transforms/IPO/IPConstantPropagation.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/contrib/llvm/lib/Transforms/IPO/IPConstantPropagation.cpp b/contrib/llvm/lib/Transforms/IPO/IPConstantPropagation.cpp index 916135e..f79b610 100644 --- a/contrib/llvm/lib/Transforms/IPO/IPConstantPropagation.cpp +++ b/contrib/llvm/lib/Transforms/IPO/IPConstantPropagation.cpp @@ -15,7 +15,6 @@ // //===----------------------------------------------------------------------===// -#include "llvm/Transforms/IPO.h" #include "llvm/ADT/SmallVector.h" #include "llvm/ADT/Statistic.h" #include "llvm/Analysis/ValueTracking.h" @@ -24,6 +23,7 @@ #include "llvm/IR/Instructions.h" #include "llvm/IR/Module.h" #include "llvm/Pass.h" +#include "llvm/Transforms/IPO.h" using namespace llvm; #define DEBUG_TYPE "ipconstprop" @@ -136,7 +136,13 @@ static bool PropagateConstantReturn(Function &F) { // For more details, see GlobalValue::mayBeDerefined. if (!F.isDefinitionExact()) return false; - + + // Don't touch naked functions. The may contain asm returning + // value we don't see, so we may end up interprocedurally propagating + // the return value incorrectly. + if (F.hasFnAttribute(Attribute::Naked)) + return false; + // Check to see if this function returns a constant. SmallVector<Value *,4> RetVals; StructType *STy = dyn_cast<StructType>(F.getReturnType()); |