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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55375 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 8 insertions, 6 deletions

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 674b36c..2ec6dcb 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -315,14 +315,14 @@ PPCInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
   return 2;
 }
 
-void PPCInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
+bool PPCInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator MI,
                                    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 == PPC::GPRCRegisterClass) {
@@ -340,9 +340,11 @@ void PPCInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
   } else if (DestRC == PPC::CRBITRCRegisterClass) {
     BuildMI(MBB, MI, get(PPC::CROR), DestReg).addReg(SrcReg).addReg(SrcReg);
   } else {
-    cerr << "Attempt to copy register that is not GPR or FPR";
-    abort();
+    // Attempt to copy register that is not GPR or FPR
+    return false;
   }
+  
+  return true;
 }
 
 bool
diff --git a/lib/Target/PowerPC/PPCInstrInfo.h b/lib/Target/PowerPC/PPCInstrInfo.h
index b7c74fb..cb5a0e6 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.h
+++ b/lib/Target/PowerPC/PPCInstrInfo.h
@@ -112,7 +112,7 @@ public:
   virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
                                 MachineBasicBlock *FBB,
                             const SmallVectorImpl<MachineOperand> &Cond) const;
-  virtual void copyRegToReg(MachineBasicBlock &MBB,
+  virtual bool copyRegToReg(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI,
                             unsigned DestReg, unsigned SrcReg,
                             const TargetRegisterClass *DestRC,