Replace PROLOG_LABEL with a new CFI_INSTRUCTION.

[oota-llvm.git] / lib / Target / ARM / ARMFrameLowering.cpp

diff --git a/lib/Target/ARM/ARMFrameLowering.cpp b/lib/Target/ARM/ARMFrameLowering.cpp
index 274a125126ad968e9e03866277c444776ccbf0de..c35cd23b91cbc019115691d6e5e00b72cc355175 100644 (file)
--- a/lib/Target/ARM/ARMFrameLowering.cpp
+++ b/lib/Target/ARM/ARMFrameLowering.cpp
@@ -179,24 +179,22 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
   if (ArgRegsSaveSize) {
     emitSPUpdate(isARM, MBB, MBBI, dl, TII, -ArgRegsSaveSize,
                  MachineInstr::FrameSetup);
-    MCSymbol *SPLabel = Context.CreateTempSymbol();
-    BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-        .addSym(SPLabel);
     CFAOffset -= ArgRegsSaveSize;
-    MMI.addFrameInst(
-        MCCFIInstruction::createDefCfaOffset(SPLabel, CFAOffset));
+    unsigned CFIIndex = MMI.addFrameInst(
+        MCCFIInstruction::createDefCfaOffset(nullptr, CFAOffset));
+    BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+        .addCFIIndex(CFIIndex);
   }
 
   if (!AFI->hasStackFrame()) {
     if (NumBytes - ArgRegsSaveSize != 0) {
       emitSPUpdate(isARM, MBB, MBBI, dl, TII, -(NumBytes - ArgRegsSaveSize),
                    MachineInstr::FrameSetup);
-      MCSymbol *SPLabel = Context.CreateTempSymbol();
-      BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-          .addSym(SPLabel);
       CFAOffset -= NumBytes - ArgRegsSaveSize;
-      MMI.addFrameInst(MCCFIInstruction::createDefCfaOffset(SPLabel,
-                                                            CFAOffset));
+      unsigned CFIIndex = MMI.addFrameInst(
+          MCCFIInstruction::createDefCfaOffset(nullptr, CFAOffset));
+      BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+          .addCFIIndex(CFIIndex);
     }
     return;
   }
@@ -311,12 +309,12 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
   }
 
   if (adjustedGPRCS1Size > 0) {
-    MCSymbol *SPLabel = Context.CreateTempSymbol();
-    BuildMI(MBB, ++GPRCS1Push, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-        .addSym(SPLabel);
     CFAOffset -= adjustedGPRCS1Size;
-    MMI.addFrameInst(
-        MCCFIInstruction::createDefCfaOffset(SPLabel, CFAOffset));
+    unsigned CFIIndex = MMI.addFrameInst(
+        MCCFIInstruction::createDefCfaOffset(nullptr, CFAOffset));
+    MachineBasicBlock::iterator Pos = ++GPRCS1Push;
+    BuildMI(MBB, Pos, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+        .addCFIIndex(CFIIndex);
     for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
            E = CSI.end(); I != E; ++I) {
       unsigned Reg = I->getReg();
@@ -339,9 +337,10 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
       case ARM::R6:
       case ARM::R7:
       case ARM::LR:
-        MMI.addFrameInst(MCCFIInstruction::createOffset(SPLabel,
-           MRI->getDwarfRegNum(Reg, true),
-           MFI->getObjectOffset(FI)));
+        CFIIndex = MMI.addFrameInst(MCCFIInstruction::createOffset(
+            nullptr, MRI->getDwarfRegNum(Reg, true), MFI->getObjectOffset(FI)));
+        BuildMI(MBB, Pos, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+            .addCFIIndex(CFIIndex);
         break;
       }
     }
@@ -357,28 +356,30 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
     emitRegPlusImmediate(!AFI->isThumbFunction(), MBB, GPRCS1Push, dl, TII,
                          FramePtr, ARM::SP, FramePtrOffsetInPush,
                          MachineInstr::FrameSetup);
-    MCSymbol *SPLabel = Context.CreateTempSymbol();
-    BuildMI(MBB, GPRCS1Push, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-        .addSym(SPLabel);
     if (FramePtrOffsetInPush) {
       CFAOffset += FramePtrOffsetInPush;
-      MMI.addFrameInst(
-          MCCFIInstruction::createDefCfa(SPLabel,
-              MRI->getDwarfRegNum(FramePtr, true), CFAOffset));
-    } else
-      MMI.addFrameInst(
-          MCCFIInstruction::createDefCfaRegister(SPLabel,
-              MRI->getDwarfRegNum(FramePtr, true)));
+      unsigned CFIIndex = MMI.addFrameInst(MCCFIInstruction::createDefCfa(
+          nullptr, MRI->getDwarfRegNum(FramePtr, true), CFAOffset));
+      BuildMI(MBB, GPRCS1Push, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+          .addCFIIndex(CFIIndex);
+
+    } else {
+      unsigned CFIIndex =
+          MMI.addFrameInst(MCCFIInstruction::createDefCfaRegister(
+              nullptr, MRI->getDwarfRegNum(FramePtr, true)));
+      BuildMI(MBB, GPRCS1Push, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+          .addCFIIndex(CFIIndex);
+    }
   }
 
   if (GPRCS2Size > 0) {
-    MCSymbol *SPLabel = Context.CreateTempSymbol();
-    BuildMI(MBB, ++GPRCS2Push, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-        .addSym(SPLabel);
+    MachineBasicBlock::iterator Pos = ++GPRCS2Push;
     if (!HasFP) {
       CFAOffset -= GPRCS2Size;
-      MMI.addFrameInst(
-          MCCFIInstruction::createDefCfaOffset(SPLabel, CFAOffset));
+      unsigned CFIIndex = MMI.addFrameInst(
+          MCCFIInstruction::createDefCfaOffset(nullptr, CFAOffset));
+      BuildMI(MBB, Pos, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+          .addCFIIndex(CFIIndex);
     }
     for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
            E = CSI.end(); I != E; ++I) {
@@ -393,8 +394,10 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
         if (STI.isTargetMachO()) {
           unsigned DwarfReg =  MRI->getDwarfRegNum(Reg, true);
           unsigned Offset = MFI->getObjectOffset(FI);
-          MMI.addFrameInst(
-              MCCFIInstruction::createOffset(SPLabel, DwarfReg, Offset));
+          unsigned CFIIndex = MMI.addFrameInst(
+              MCCFIInstruction::createOffset(nullptr, DwarfReg, Offset));
+          BuildMI(MBB, Pos, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+              .addCFIIndex(CFIIndex);
         }
         break;
       }
@@ -404,24 +407,17 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
   if (DPRCSSize > 0) {
     // Since vpush register list cannot have gaps, there may be multiple vpush
     // instructions in the prologue.
-    MCSymbol *SPLabel = NULL;
     do {
       MachineBasicBlock::iterator Push = DPRCSPush++;
       if (!HasFP) {
-        SPLabel = Context.CreateTempSymbol();
-        BuildMI(MBB, DPRCSPush, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-            .addSym(SPLabel);
         CFAOffset -= sizeOfSPAdjustment(Push);;
-        MMI.addFrameInst(
-            MCCFIInstruction::createDefCfaOffset(SPLabel, CFAOffset));
+        unsigned CFIIndex = MMI.addFrameInst(
+            MCCFIInstruction::createDefCfaOffset(nullptr, CFAOffset));
+        BuildMI(MBB, DPRCSPush, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+            .addCFIIndex(CFIIndex);
       }
     } while (DPRCSPush->getOpcode() == ARM::VSTMDDB_UPD);
 
-    if (!SPLabel) {
-      SPLabel = Context.CreateTempSymbol();
-      BuildMI(MBB, DPRCSPush, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-          .addSym(SPLabel);
-    }
     for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
            E = CSI.end(); I != E; ++I) {
       unsigned Reg = I->getReg();
@@ -430,20 +426,21 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF) const {
           (Reg < ARM::D8 || Reg >= ARM::D8 + AFI->getNumAlignedDPRCS2Regs())) {
         unsigned DwarfReg = MRI->getDwarfRegNum(Reg, true);
         unsigned Offset = MFI->getObjectOffset(FI);
-        MMI.addFrameInst(MCCFIInstruction::createOffset(SPLabel, DwarfReg,
-                                                        Offset));
+        unsigned CFIIndex = MMI.addFrameInst(
+            MCCFIInstruction::createOffset(nullptr, DwarfReg, Offset));
+        BuildMI(MBB, DPRCSPush, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+            .addCFIIndex(CFIIndex);
       }
     }
   }
 
   if (NumBytes) {
     if (!HasFP) {
-      MCSymbol *SPLabel = Context.CreateTempSymbol();
-      BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::PROLOG_LABEL))
-          .addSym(SPLabel);
       CFAOffset -= NumBytes;
-      MMI.addFrameInst(
-          MCCFIInstruction::createDefCfaOffset(SPLabel, CFAOffset));
+      unsigned CFIIndex = MMI.addFrameInst(
+          MCCFIInstruction::createDefCfaOffset(nullptr, CFAOffset));
+      BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+          .addCFIIndex(CFIIndex);
     }
   }