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

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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
This commit is contained in:
Owen Anderson
2008-08-26 18:03:31 +00:00
parent a0b3909d43
commit 940f83e772
18 changed files with 78 additions and 59 deletions
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10
lib/CodeGen/SelectionDAG/FastISel.cpp
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@@ -250,9 +250,6 @@ FastISel::SelectInstructions(BasicBlock::iterator Begin,
!TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT))
// Unhandled type. Halt "fast" selection and bail.
return I;
if (!TLI.isConvertLegal(SrcVT, DstVT))
// Illegal conversion. Halt "fast" selection and bail.
return I;
// Otherwise, insert a register-to-register copy.
TargetRegisterClass* SrcClass = TLI.getRegClassFor(SrcVT);
@@ -264,9 +261,12 @@ FastISel::SelectInstructions(BasicBlock::iterator Begin,
// Unhandled operand. Halt "fast" selection and bail.
return false;
TII.copyRegToReg(*MBB, MBB->end(), ResultReg, Op0, DstClass, SrcClass);
ValueMap[I] = ResultReg;
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
Op0, DstClass, SrcClass);
if (!InsertedCopy)
return I;
ValueMap[I] = ResultReg;
break;
} else
// TODO: Casting a non-integral constant?