mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-24 04:09:45 +00:00
55c0268714
MCRelaxableFragment previously kept a copy of MCSubtargetInfo and MCInst to enable re-encoding the MCInst later during relaxation. A copy of MCSubtargetInfo (instead of a reference or pointer) was needed because the feature bits could be modified by the parser. This commit replaces the MCSubtargetInfo copy in MCRelaxableFragment with a constant reference to MCSubtargetInfo. The copies of MCSubtargetInfo are kept in MCContext, and the target parsers are now responsible for asking MCContext to provide a copy whenever the feature bits of MCSubtargetInfo have to be toggled. With this patch, I saw a 4% reduction in peak memory usage when I compiled verify-uselistorder.lto.bc using llc. rdar://problem/21736951 Differential Revision: http://reviews.llvm.org/D14346 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253127 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
941 B
C++
33 lines
941 B
C++
//===-- MCTargetAsmParser.cpp - Target Assembly Parser ---------------------==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCTargetAsmParser.h"
|
|
using namespace llvm;
|
|
|
|
MCTargetAsmParser::MCTargetAsmParser(MCTargetOptions const &MCOptions,
|
|
const MCSubtargetInfo &STI)
|
|
: AvailableFeatures(0), ParsingInlineAsm(false), MCOptions(MCOptions),
|
|
STI(&STI)
|
|
{
|
|
}
|
|
|
|
MCTargetAsmParser::~MCTargetAsmParser() {
|
|
}
|
|
|
|
MCSubtargetInfo &MCTargetAsmParser::copySTI() {
|
|
MCSubtargetInfo &STICopy = getContext().getSubtargetCopy(getSTI());
|
|
STI = &STICopy;
|
|
return STICopy;
|
|
}
|
|
|
|
const MCSubtargetInfo &MCTargetAsmParser::getSTI() const {
|
|
return *STI;
|
|
}
|