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 25211d4..a318f81 100644
--- a/lib/Target/Mips/MipsTargetMachine.cpp
+++ b/lib/Target/Mips/MipsTargetMachine.cpp
@@ -96,7 +96,10 @@
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;
}