diff options
Diffstat (limited to 'lib/CodeGen/TwoAddressInstructionPass.cpp')
| -rw-r--r-- | lib/CodeGen/TwoAddressInstructionPass.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp index 4b72f6a84ca1..43d876646967 100644 --- a/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/lib/CodeGen/TwoAddressInstructionPass.cpp @@ -1,9 +1,8 @@ //===- TwoAddressInstructionPass.cpp - Two-Address instruction pass -------===// // -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // @@ -1245,8 +1244,13 @@ bool TwoAddressInstructionPass::tryInstructionCommute(MachineInstr *MI, ++NumAggrCommuted; // There might be more than two commutable operands, update BaseOp and // continue scanning. + // FIXME: This assumes that the new instruction's operands are in the + // same positions and were simply swapped. BaseOpReg = OtherOpReg; BaseOpKilled = OtherOpKilled; + // Resamples OpsNum in case the number of operands was reduced. This + // happens with X86. + OpsNum = MI->getDesc().getNumOperands(); continue; } // If this was a commute based on kill, we won't do better continuing. |