Disable each MachineFunctionPass for 'optnone' functions, unless that

pass normally runs at optimization level None, or is part of the
register allocation pipeline.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205228 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/BranchFolding.cpp

@@ -82,6 +82,9 @@ INITIALIZE_PASS(BranchFolderPass, "branch-folder",
                 "Control Flow Optimizer", false, false)
 
 bool BranchFolderPass::runOnMachineFunction(MachineFunction &MF) {
+  if (skipOptnoneFunction(*MF.getFunction()))
+    return false;
+
   TargetPassConfig *PassConfig = &getAnalysis<TargetPassConfig>();
   // TailMerge can create jump into if branches that make CFG irreducible for
   // HW that requires structurized CFG.