assert(0) -> LLVM_UNREACHABLE.

[oota-llvm.git] / lib / Target / Alpha / AlphaRegisterInfo.cpp

diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp
index b050debb46c9b992e0fd29ab2793f47d7785e970..f1e651c6a805894ee2eea08146f981a482a3d17f 100644 (file)
--- a/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -28,6 +28,8 @@
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include <cstdlib>
@@ -54,19 +56,10 @@ static long getLower16(long l)
 
 AlphaRegisterInfo::AlphaRegisterInfo(const TargetInstrInfo &tii)
   : AlphaGenRegisterInfo(Alpha::ADJUSTSTACKDOWN, Alpha::ADJUSTSTACKUP),
-    TII(tii)
+    TII(tii), curgpdist(0)
 {
 }
 
-void AlphaRegisterInfo::reMaterialize(MachineBasicBlock &MBB,
-                                      MachineBasicBlock::iterator I,
-                                      unsigned DestReg,
-                                      const MachineInstr *Orig) const {
-  MachineInstr *MI = Orig->clone();
-  MI->getOperand(0).setReg(DestReg);
-  MBB.insert(I, MI);
-}
-
 const unsigned* AlphaRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
                                                                          const {
   static const unsigned CalleeSavedRegs[] = {
@@ -112,7 +105,7 @@ BitVector AlphaRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 // if frame pointer elimination is disabled.
 //
 bool AlphaRegisterInfo::hasFP(const MachineFunction &MF) const {
-  MachineFrameInfo *MFI = MF.getFrameInfo();
+  const MachineFrameInfo *MFI = MF.getFrameInfo();
   return MFI->hasVarSizedObjects();
 }
 
@@ -134,11 +127,11 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
 
       MachineInstr *New;
       if (Old->getOpcode() == Alpha::ADJUSTSTACKDOWN) {
-        New=BuildMI(TII.get(Alpha::LDA), Alpha::R30)
+        New=BuildMI(MF, Old->getDebugLoc(), TII.get(Alpha::LDA), Alpha::R30)
           .addImm(-Amount).addReg(Alpha::R30);
       } else {
          assert(Old->getOpcode() == Alpha::ADJUSTSTACKUP);
-         New=BuildMI(TII.get(Alpha::LDA), Alpha::R30)
+         New=BuildMI(MF, Old->getDebugLoc(), TII.get(Alpha::LDA), Alpha::R30)
           .addImm(Amount).addReg(Alpha::R30);
       }
 
@@ -168,7 +161,7 @@ void AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   MachineFunction &MF = *MBB.getParent();
   bool FP = hasFP(MF);
 
-  while (!MI.getOperand(i).isFrameIndex()) {
+  while (!MI.getOperand(i).isFI()) {
     ++i;
     assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
   }
@@ -197,7 +190,8 @@ void AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
     MI.getOperand(i + 1).ChangeToRegister(Alpha::R28, false);
     MI.getOperand(i).ChangeToImmediate(getLower16(Offset));
     //insert the new
-    MachineInstr* nMI=BuildMI(TII.get(Alpha::LDAH), Alpha::R28)
+    MachineInstr* nMI=BuildMI(MF, MI.getDebugLoc(),
+                              TII.get(Alpha::LDAH), Alpha::R28)
       .addImm(getUpper16(Offset)).addReg(FP ? Alpha::R15 : Alpha::R30);
     MBB.insert(II, nMI);
   } else {
@@ -210,20 +204,20 @@ void AlphaRegisterInfo::emitPrologue(MachineFunction &MF) const {
   MachineBasicBlock &MBB = MF.front();   // Prolog goes in entry BB
   MachineBasicBlock::iterator MBBI = MBB.begin();
   MachineFrameInfo *MFI = MF.getFrameInfo();
+  DebugLoc dl = (MBBI != MBB.end() ?
+                 MBBI->getDebugLoc() : DebugLoc::getUnknownLoc());
   bool FP = hasFP(MF);
 
-  static int curgpdist = 0;
-
   //handle GOP offset
-  BuildMI(MBB, MBBI, TII.get(Alpha::LDAHg), Alpha::R29)
+  BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAHg), Alpha::R29)
     .addGlobalAddress(const_cast<Function*>(MF.getFunction()))
     .addReg(Alpha::R27).addImm(++curgpdist);
-  BuildMI(MBB, MBBI, TII.get(Alpha::LDAg), Alpha::R29)
+  BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAg), Alpha::R29)
     .addGlobalAddress(const_cast<Function*>(MF.getFunction()))
     .addReg(Alpha::R29).addImm(curgpdist);
 
   //evil const_cast until MO stuff setup to handle const
-  BuildMI(MBB, MBBI, TII.get(Alpha::ALTENT))
+  BuildMI(MBB, MBBI, dl, TII.get(Alpha::ALTENT))
     .addGlobalAddress(const_cast<Function*>(MF.getFunction()));
 
   // Get the number of bytes to allocate from the FrameInfo
@@ -244,25 +238,27 @@ void AlphaRegisterInfo::emitPrologue(MachineFunction &MF) const {
   // adjust stack pointer: r30 -= numbytes
   NumBytes = -NumBytes;
   if (NumBytes >= IMM_LOW) {
-    BuildMI(MBB, MBBI, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
       .addReg(Alpha::R30);
   } else if (getUpper16(NumBytes) >= IMM_LOW) {
-    BuildMI(MBB, MBBI, TII.get(Alpha::LDAH), Alpha::R30).addImm(getUpper16(NumBytes))
-      .addReg(Alpha::R30);
-    BuildMI(MBB, MBBI, TII.get(Alpha::LDA), Alpha::R30).addImm(getLower16(NumBytes))
-      .addReg(Alpha::R30);
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30)
+      .addImm(getUpper16(NumBytes)).addReg(Alpha::R30);
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30)
+      .addImm(getLower16(NumBytes)).addReg(Alpha::R30);
   } else {
-    cerr << "Too big a stack frame at " << NumBytes << "\n";
-    abort();
+    std::string msg;
+    raw_string_ostream Msg(msg); 
+    Msg << "Too big a stack frame at " + NumBytes;
+    llvm_report_error(Msg.str());
   }
 
   //now if we need to, save the old FP and set the new
   if (FP)
   {
-    BuildMI(MBB, MBBI, TII.get(Alpha::STQ))
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::STQ))
       .addReg(Alpha::R15).addImm(0).addReg(Alpha::R30);
     //this must be the last instr in the prolog
-    BuildMI(MBB, MBBI, TII.get(Alpha::BISr), Alpha::R15)
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R15)
       .addReg(Alpha::R30).addReg(Alpha::R30);
   }
 
@@ -275,6 +271,7 @@ void AlphaRegisterInfo::emitEpilogue(MachineFunction &MF,
   assert((MBBI->getOpcode() == Alpha::RETDAG ||
           MBBI->getOpcode() == Alpha::RETDAGp)
          && "Can only insert epilog into returning blocks");
+  DebugLoc dl = MBBI->getDebugLoc();
 
   bool FP = hasFP(MF);
 
@@ -284,30 +281,33 @@ void AlphaRegisterInfo::emitEpilogue(MachineFunction &MF,
   //now if we need to, restore the old FP
   if (FP) {
     //copy the FP into the SP (discards allocas)
-    BuildMI(MBB, MBBI, TII.get(Alpha::BISr), Alpha::R30).addReg(Alpha::R15)
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R30).addReg(Alpha::R15)
       .addReg(Alpha::R15);
     //restore the FP
-    BuildMI(MBB, MBBI, TII.get(Alpha::LDQ), Alpha::R15).addImm(0).addReg(Alpha::R15);
+    BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDQ), Alpha::R15)
+      .addImm(0).addReg(Alpha::R15);
   }
 
   if (NumBytes != 0) {
     if (NumBytes <= IMM_HIGH) {
-      BuildMI(MBB, MBBI, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
+      BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
         .addReg(Alpha::R30);
     } else if (getUpper16(NumBytes) <= IMM_HIGH) {
-      BuildMI(MBB, MBBI, TII.get(Alpha::LDAH), Alpha::R30)
+      BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30)
         .addImm(getUpper16(NumBytes)).addReg(Alpha::R30);
-      BuildMI(MBB, MBBI, TII.get(Alpha::LDA), Alpha::R30)
+      BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30)
         .addImm(getLower16(NumBytes)).addReg(Alpha::R30);
     } else {
-      cerr << "Too big a stack frame at " << NumBytes << "\n";
-      abort();
+      std::string msg;
+      raw_string_ostream Msg(msg); 
+      Msg << "Too big a stack frame at " + NumBytes;
+      llvm_report_error(Msg.str());
     }
   }
 }
 
 unsigned AlphaRegisterInfo::getRARegister() const {
-  assert(0 && "What is the return address register");
+  LLVM_UNREACHABLE("What is the return address register");
   return 0;
 }
 
@@ -316,17 +316,17 @@ unsigned AlphaRegisterInfo::getFrameRegister(MachineFunction &MF) const {
 }
 
 unsigned AlphaRegisterInfo::getEHExceptionRegister() const {
-  assert(0 && "What is the exception register");
+  LLVM_UNREACHABLE("What is the exception register");
   return 0;
 }
 
 unsigned AlphaRegisterInfo::getEHHandlerRegister() const {
-  assert(0 && "What is the exception handler register");
+  LLVM_UNREACHABLE("What is the exception handler register");
   return 0;
 }
 
 int AlphaRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const {
-  assert(0 && "What is the dwarf register number");
+  LLVM_UNREACHABLE("What is the dwarf register number");
   return -1;
 }
 
@@ -334,6 +334,6 @@ int AlphaRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const {
 
 std::string AlphaRegisterInfo::getPrettyName(unsigned reg)
 {
-  std::string s(RegisterDescriptors[reg].PrintableName);
+  std::string s(RegisterDescriptors[reg].Name);
   return s;
 }