Teach FunctionAttrs about the VAArg instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118627 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/FunctionAttrs.cpp b/lib/Transforms/IPO/FunctionAttrs.cpp
index fcdc5f1..8bdf5d7 100644
--- a/lib/Transforms/IPO/FunctionAttrs.cpp
+++ b/lib/Transforms/IPO/FunctionAttrs.cpp
@@ -195,6 +195,13 @@
if (AA->pointsToConstantMemory(Loc, /*OrLocal=*/true))
continue;
}
+ } else if (VAArgInst *VI = dyn_cast<VAArgInst>(I)) {
+ // Ignore vaargs on local memory.
+ AliasAnalysis::Location Loc(VI->getPointerOperand(),
+ AliasAnalysis::UnknownSize,
+ VI->getMetadata(LLVMContext::MD_tbaa));
+ if (AA->pointsToConstantMemory(Loc, /*OrLocal=*/true))
+ continue;
}
// Any remaining instructions need to be taken seriously! Check if they