Fix PR5149.

http://llvm.org/bugs/show_bug.cgi?id=5149

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86543 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsMachineFunction.h b/lib/Target/Mips/MipsMachineFunction.h
index 949c78aebc938c494c670f3522ba8ce9fefc8253..a300f49ff5d475cc2047a88d0f9ff577deaa3f3d 100644 (file)
--- a/lib/Target/Mips/MipsMachineFunction.h
+++ b/lib/Target/Mips/MipsMachineFunction.h
@@ -103,6 +103,7 @@ public:
   int getGPFI() const { return GPHolder.FI; }
   void setGPStackOffset(int Off) { GPHolder.SPOffset = Off; }
   void setGPFI(int FI) { GPHolder.FI = FI; }
+  bool needGPSaveRestore() const { return GPHolder.SPOffset != -1; }
 
   bool hasLoadArgs() const { return HasLoadArgs; }
   bool hasStoreVarArgs() const { return HasStoreVarArgs; } 

diff --git a/lib/Target/Mips/MipsRegisterInfo.cpp b/lib/Target/Mips/MipsRegisterInfo.cpp
index d2289e9cdbaa9c35272b6e206e0171394798d00e..e90bb3af8246caec95c0ebf3b38a5e9d06599af4 100644 (file)
--- a/lib/Target/Mips/MipsRegisterInfo.cpp
+++ b/lib/Target/Mips/MipsRegisterInfo.cpp
@@ -438,11 +438,10 @@ emitPrologue(MachineFunction &MF) const
       .addReg(Mips::SP).addReg(Mips::ZERO);
   }
 
-  // PIC speficic function prologue
-  if ((isPIC) && (MFI->hasCalls())) {
+  // Restore GP from the saved stack location
+  if (MipsFI->needGPSaveRestore())
     BuildMI(MBB, MBBI, dl, TII.get(Mips::CPRESTORE))
       .addImm(MipsFI->getGPStackOffset());
-  }
 }
 
 void MipsRegisterInfo::
@@ -489,13 +488,11 @@ emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const
 
 void MipsRegisterInfo::
 processFunctionBeforeFrameFinalized(MachineFunction &MF) const {
-  // Set the SPOffset on the FI where GP must be saved/loaded.
+  // Set the stack offset where GP must be saved/loaded from.
   MachineFrameInfo *MFI = MF.getFrameInfo();
-  bool isPIC = (MF.getTarget().getRelocationModel() == Reloc::PIC_);
-  if (MFI->hasCalls() && isPIC) { 
-    MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
+  MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
+  if (MipsFI->needGPSaveRestore())
     MFI->setObjectOffset(MipsFI->getGPFI(), MipsFI->getGPStackOffset());
-  }    
 }
 
 unsigned MipsRegisterInfo::