Make TargetInstrInfo::copyRegToReg return a bool indicating whether the copy requested

was inserted or not.  This allows bitcast in fast isel to properly handle the case
where an appropriate reg-to-reg copy is not available.

llvm-svn: 55375

2 files changed, 8 insertions, 5 deletions

diff --git a/llvm/lib/Target/Sparc/SparcInstrInfo.cpp b/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
index 68605a75d47..ab18044d6d4 100644
--- a/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
+++ b/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
@@ -109,14 +109,14 @@ SparcInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
   return 1;
 }
 
-void SparcInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
+bool SparcInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
                                      MachineBasicBlock::iterator I,
                                      unsigned DestReg, unsigned SrcReg,
                                      const TargetRegisterClass *DestRC,
                                      const TargetRegisterClass *SrcRC) const {
   if (DestRC != SrcRC) {
-    cerr << "Not yet supported!";
-    abort();
+    // Not yet supported!
+    return false;
   }
 
   if (DestRC == SP::IntRegsRegisterClass)
@@ -127,7 +127,10 @@ void SparcInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
     BuildMI(MBB, I, get(Subtarget.isV9() ? SP::FMOVD : SP::FpMOVD),DestReg)
       .addReg(SrcReg);
   else
-    assert (0 && "Can't copy this register");
+    // Can't copy this register
+    return false;
+
+  return true;
 }
 
 void SparcInstrInfo::
diff --git a/llvm/lib/Target/Sparc/SparcInstrInfo.h b/llvm/lib/Target/Sparc/SparcInstrInfo.h
index d19d55f84f6..aadbefd9db0 100644
--- a/llvm/lib/Target/Sparc/SparcInstrInfo.h
+++ b/llvm/lib/Target/Sparc/SparcInstrInfo.h
@@ -68,7 +68,7 @@ public:
                                 MachineBasicBlock *FBB,
                             const SmallVectorImpl<MachineOperand> &Cond) const;
 
-  virtual void copyRegToReg(MachineBasicBlock &MBB,
+  virtual bool copyRegToReg(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator I,
                             unsigned DestReg, unsigned SrcReg,
                             const TargetRegisterClass *DestRC,