[GMR/OperandBundles] Teach getModRefBehavior about operand bundles
In general, memory restrictions on a called function (e.g. readnone)
cannot be transferred to a CallSite that has operand bundles. It is
possible to make this inference smarter, but lets fix the behavior to be
correct first.
llvm-svn: 260193
diff --git a/llvm/lib/Analysis/GlobalsModRef.cpp b/llvm/lib/Analysis/GlobalsModRef.cpp
index 8338dcc..549b374 100644
--- a/llvm/lib/Analysis/GlobalsModRef.cpp
+++ b/llvm/lib/Analysis/GlobalsModRef.cpp
@@ -243,13 +243,14 @@
GlobalsAAResult::getModRefBehavior(ImmutableCallSite CS) {
FunctionModRefBehavior Min = FMRB_UnknownModRefBehavior;
- if (const Function *F = CS.getCalledFunction())
- if (FunctionInfo *FI = getFunctionInfo(F)) {
- if (FI->getModRefInfo() == MRI_NoModRef)
- Min = FMRB_DoesNotAccessMemory;
- else if ((FI->getModRefInfo() & MRI_Mod) == 0)
- Min = FMRB_OnlyReadsMemory;
- }
+ if (!CS.hasOperandBundles())
+ if (const Function *F = CS.getCalledFunction())
+ if (FunctionInfo *FI = getFunctionInfo(F)) {
+ if (FI->getModRefInfo() == MRI_NoModRef)
+ Min = FMRB_DoesNotAccessMemory;
+ else if ((FI->getModRefInfo() & MRI_Mod) == 0)
+ Min = FMRB_OnlyReadsMemory;
+ }
return FunctionModRefBehavior(AAResultBase::getModRefBehavior(CS) & Min);
}