From: Matthias Braun <matze@braunis.de>
Date: Tue, 5 Dec 2017 00:56:14 +0000 (+0000)
Subject: TwoAddressInstructionPass: Trigger -O0 behavior on optnone
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c67785b60c352984dd14fa82fce86737fafe9deb;p=llvm

TwoAddressInstructionPass: Trigger -O0 behavior on optnone

While we cannot skip the whole TwoAddressInstructionPass even for -O0
there are some parts of the pass that are currently skipped at -O0 but
not for optnone. Changing this as there is no reason to have those two
hit different code paths here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@319721 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 28a4375cb28..c51340766b7 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1661,6 +1661,10 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &Func) {
   else
     AA = nullptr;
   OptLevel = TM.getOptLevel();
+  // Disable optimizations if requested. We cannot skip the whole pass as some
+  // fixups are necessary for correctness.
+  if (skipFunction(*Func.getFunction()))
+    OptLevel = CodeGenOpt::None;
 
   bool MadeChange = false;