From: Akira Hatanaka <ahatanak@gmail.com>
Date: Tue, 27 Sep 2011 16:58:43 +0000 (+0000)
Subject: Do not add the pass that restores $gp if target is Mips64.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=78fec58c07837ecf935cf437ec672b8b46ff6d7b;p=oota-llvm.git

Do not add the pass that restores $gp if target is Mips64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140607 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/Mips/MipsTargetMachine.cpp b/lib/Target/Mips/MipsTargetMachine.cpp
index 25211d472f0..a318f81352a 100644
--- a/lib/Target/Mips/MipsTargetMachine.cpp
+++ b/lib/Target/Mips/MipsTargetMachine.cpp
@@ -96,7 +96,10 @@ addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
 
 bool MipsTargetMachine::
 addPreRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
-  PM.add(createMipsEmitGPRestorePass(*this));
+  // Do not restore $gp if target is Mips64.
+  // In N32/64, $gp is a callee-saved register.
+  if (!Subtarget.hasMips64())
+    PM.add(createMipsEmitGPRestorePass(*this));
   return true;
 }