Rather than having special rules like "intrinsics cannot
throw exceptions", just mark intrinsics with the nounwind
attribute. Likewise, mark intrinsics as readnone/readonly
and get rid of special aliasing logic (which didn't use
anything more than this anyway).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44544 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/AliasAnalysis.cpp b/lib/Analysis/AliasAnalysis.cpp
index 9e1ae2a..12ea937 100644
--- a/lib/Analysis/AliasAnalysis.cpp
+++ b/lib/Analysis/AliasAnalysis.cpp
@@ -116,13 +116,13 @@
AliasAnalysis::ModRefBehavior
AliasAnalysis::getModRefBehavior(CallSite CS,
std::vector<PointerAccessInfo> *Info) {
- if (CS.paramHasAttr(0, ParamAttr::ReadNone))
+ if (CS.doesNotAccessMemory())
// Can't do better than this.
return DoesNotAccessMemory;
ModRefBehavior MRB = UnknownModRefBehavior;
if (Function *F = CS.getCalledFunction())
MRB = getModRefBehavior(F, CS, Info);
- if (MRB != DoesNotAccessMemory && CS.paramHasAttr(0, ParamAttr::ReadOnly))
+ if (MRB != DoesNotAccessMemory && CS.onlyReadsMemory())
return OnlyReadsMemory;
return MRB;
}
@@ -130,11 +130,11 @@
AliasAnalysis::ModRefBehavior
AliasAnalysis::getModRefBehavior(Function *F,
std::vector<PointerAccessInfo> *Info) {
- if (F->paramHasAttr(0, ParamAttr::ReadNone))
+ if (F->doesNotAccessMemory())
// Can't do better than this.
return DoesNotAccessMemory;
ModRefBehavior MRB = getModRefBehavior(F, CallSite(), Info);
- if (MRB != DoesNotAccessMemory && F->paramHasAttr(0, ParamAttr::ReadOnly))
+ if (MRB != DoesNotAccessMemory && F->onlyReadsMemory())
return OnlyReadsMemory;
return MRB;
}