Handle intrinsics in GlobalsModRef. Fixes pr12351.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153604 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/IPA/GlobalsModRef.cpp b/lib/Analysis/IPA/GlobalsModRef.cpp
index b226d66..c1d8e3e 100644
--- a/lib/Analysis/IPA/GlobalsModRef.cpp
+++ b/lib/Analysis/IPA/GlobalsModRef.cpp
@@ -21,6 +21,7 @@
#include "llvm/Instructions.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
+#include "llvm/IntrinsicInst.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Analysis/MemoryBuiltins.h"
@@ -467,6 +468,11 @@
} else if (isMalloc(&cast<Instruction>(*II)) ||
isFreeCall(&cast<Instruction>(*II))) {
FunctionEffect |= ModRef;
+ } else if (IntrinsicInst *Intrinsic = dyn_cast<IntrinsicInst>(&*II)) {
+ // The callgraph doesn't include intrinsic calls.
+ Function *Callee = Intrinsic->getCalledFunction();
+ ModRefBehavior Behaviour = AliasAnalysis::getModRefBehavior(Callee);
+ FunctionEffect |= (Behaviour & ModRef);
}
if ((FunctionEffect & Mod) == 0)