Disable my little CopyToReg argument hack with fast-isel. rdar://problem/9413587 .
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131156 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index a01e2b8..e5329f7 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -6440,10 +6440,11 @@
// 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;