From 7f33d677a9d6ea575795ac5948d492bb0f4c8fed Mon Sep 17 00:00:00 2001 From: Eli Friedman Date: Tue, 10 May 2011 21:50:58 +0000 Subject: [PATCH] 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 --- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index a01e2b86c2b..e5329f76f1c 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -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(Res.getOperand(1))->getReg(); if (TargetRegisterInfo::isVirtualRegister(Reg)) { FuncInfo->ValueMap[I] = Reg; -- 2.34.1