mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-20 19:42:54 +02:00
0fb89f87e0
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 llvm-svn: 253127
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
//===- X86AsmInstrumentation.h - Instrument X86 inline assembly *- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_X86_ASMPARSER_X86ASMINSTRUMENTATION_H
|
|
#define LLVM_LIB_TARGET_X86_ASMPARSER_X86ASMINSTRUMENTATION_H
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
|
|
#include <memory>
|
|
|
|
namespace llvm {
|
|
|
|
class MCContext;
|
|
class MCInst;
|
|
class MCInstrInfo;
|
|
class MCParsedAsmOperand;
|
|
class MCStreamer;
|
|
class MCSubtargetInfo;
|
|
class MCTargetOptions;
|
|
|
|
class X86AsmInstrumentation;
|
|
|
|
X86AsmInstrumentation *
|
|
CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
|
|
const MCContext &Ctx,
|
|
const MCSubtargetInfo *&STI);
|
|
|
|
class X86AsmInstrumentation {
|
|
public:
|
|
virtual ~X86AsmInstrumentation();
|
|
|
|
// Sets frame register corresponding to a current frame.
|
|
void SetInitialFrameRegister(unsigned RegNo) {
|
|
InitialFrameReg = RegNo;
|
|
}
|
|
|
|
// Tries to instrument and emit instruction.
|
|
virtual void InstrumentAndEmitInstruction(
|
|
const MCInst &Inst,
|
|
SmallVectorImpl<std::unique_ptr<MCParsedAsmOperand> > &Operands,
|
|
MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out);
|
|
|
|
protected:
|
|
friend X86AsmInstrumentation *
|
|
CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
|
|
const MCContext &Ctx,
|
|
const MCSubtargetInfo *&STI);
|
|
|
|
X86AsmInstrumentation(const MCSubtargetInfo *&STI);
|
|
|
|
unsigned GetFrameRegGeneric(const MCContext &Ctx, MCStreamer &Out);
|
|
|
|
void EmitInstruction(MCStreamer &Out, const MCInst &Inst);
|
|
|
|
const MCSubtargetInfo *&STI;
|
|
|
|
unsigned InitialFrameReg;
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|