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Disable my little CopyToReg argument hack with fast-isel. rdar://problem/9413587 .

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llvm-svn: 131156
This commit is contained in:
Eli Friedman 2011-05-10 21:50:58 +00:00
parent 17ae92b2d8
commit aecbcc0c8f
1 changed files with 3 additions and 2 deletions
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5
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -6440,10 +6440,11 @@ void SelectionDAGISel::LowerArguments(const BasicBlock *LLVMBB) {
// If this argument is live outside of the entry block, insert a copy from
// wherever we got it to the vreg that other BB's will reference it as.
if (Res.getOpcode() == ISD::CopyFromReg) {
if (!EnableFastISel && Res.getOpcode() == ISD::CopyFromReg) {
// If we can, though, try to skip creating an unnecessary vreg.
// FIXME: This isn't very clean... it would be nice to make this more
// general.
// general. It's also subtly incompatible with the hacks FastISel
// uses with vregs.
unsigned Reg = cast<RegisterSDNode>(Res.getOperand(1))->getReg();
if (TargetRegisterInfo::isVirtualRegister(Reg)) {
FuncInfo->ValueMap[I] = Reg;