[Mem2Reg] Respect optnone
Mem2Reg shouldn't be optimizing a function that is marked
optnone. There is a test checking this that fails when mem2reg is
explicitly added to the standard pass pipeline.
llvm-svn: 255336
diff --git a/llvm/lib/Transforms/Utils/Mem2Reg.cpp b/llvm/lib/Transforms/Utils/Mem2Reg.cpp
index 00cf4e6..aa1e35d 100644
--- a/llvm/lib/Transforms/Utils/Mem2Reg.cpp
+++ b/llvm/lib/Transforms/Utils/Mem2Reg.cpp
@@ -63,6 +63,9 @@
BasicBlock &BB = F.getEntryBlock(); // Get the entry node for the function
+ if (F.hasFnAttribute(Attribute::OptimizeNone))
+ return false;
+
bool Changed = false;
DominatorTree &DT = getAnalysis<DominatorTreeWrapperPass>().getDomTree();