Update XCoreRegisterInfo::eliminateFrameIndex() to handle DBG_VALUE

instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135146 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/XCore/XCoreRegisterInfo.cpp b/lib/Target/XCore/XCoreRegisterInfo.cpp
index 2bf43b40ba8843f35a6b719d74c170fe848561ac..0aa7d5fb3e9f8ef63d15959f68b16bbd9614940c 100644 (file)
--- a/lib/Target/XCore/XCoreRegisterInfo.cpp
+++ b/lib/Target/XCore/XCoreRegisterInfo.cpp
@@ -196,7 +196,16 @@ XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   #endif
 
   Offset += StackSize;
-  
+
+  unsigned FrameReg = getFrameRegister(MF);
+
+  // Special handling of DBG_VALUE instructions.
+  if (MI.isDebugValue()) {
+    MI.getOperand(i).ChangeToRegister(FrameReg, false /*isDef*/);
+    MI.getOperand(i+1).ChangeToImmediate(Offset);
+    return;
+  }
+
   // fold constant into offset.
   Offset += MI.getOperand(i + 1).getImm();
   MI.getOperand(i + 1).ChangeToImmediate(0);
@@ -208,7 +217,7 @@ XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   Offset/=4;
   
   bool FP = TFI->hasFP(MF);
-  
+
   unsigned Reg = MI.getOperand(0).getReg();
   bool isKill = MI.getOpcode() == XCore::STWFI && MI.getOperand(0).isKill();
 
@@ -219,7 +228,6 @@ XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   
   if (FP) {
     bool isUs = isImmUs(Offset);
-    unsigned FramePtr = XCore::R10;
     
     if (!isUs) {
       if (!RS)
@@ -231,18 +239,18 @@ XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
       switch (MI.getOpcode()) {
       case XCore::LDWFI:
         BuildMI(MBB, II, dl, TII.get(XCore::LDW_3r), Reg)
-              .addReg(FramePtr)
+              .addReg(FrameReg)
               .addReg(ScratchReg, RegState::Kill);
         break;
       case XCore::STWFI:
         BuildMI(MBB, II, dl, TII.get(XCore::STW_3r))
               .addReg(Reg, getKillRegState(isKill))
-              .addReg(FramePtr)
+              .addReg(FrameReg)
               .addReg(ScratchReg, RegState::Kill);
         break;
       case XCore::LDAWFI:
         BuildMI(MBB, II, dl, TII.get(XCore::LDAWF_l3r), Reg)
-              .addReg(FramePtr)
+              .addReg(FrameReg)
               .addReg(ScratchReg, RegState::Kill);
         break;
       default:
@@ -252,18 +260,18 @@ XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
       switch (MI.getOpcode()) {
       case XCore::LDWFI:
         BuildMI(MBB, II, dl, TII.get(XCore::LDW_2rus), Reg)
-              .addReg(FramePtr)
+              .addReg(FrameReg)
               .addImm(Offset);
         break;
       case XCore::STWFI:
         BuildMI(MBB, II, dl, TII.get(XCore::STW_2rus))
               .addReg(Reg, getKillRegState(isKill))
-              .addReg(FramePtr)
+              .addReg(FrameReg)
               .addImm(Offset);
         break;
       case XCore::LDAWFI:
         BuildMI(MBB, II, dl, TII.get(XCore::LDAWF_l2rus), Reg)
-              .addReg(FramePtr)
+              .addReg(FrameReg)
               .addImm(Offset);
         break;
       default: