llvm-6502/lib/Target/CellSPU/SPUSubtarget.cpp
Kalle Raiskila c2ebfd454c Enable PostRA scheduling for SPU.
This speeds up selected test cases with up to
5% - no slowdowns observed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120286 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-29 10:30:25 +00:00

58 lines
2.0 KiB
C++

//===- SPUSubtarget.cpp - STI Cell SPU Subtarget Information --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the CellSPU-specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#include "SPUSubtarget.h"
#include "SPU.h"
#include "SPUGenSubtarget.inc"
#include "llvm/ADT/SmallVector.h"
#include "SPURegisterInfo.h"
using namespace llvm;
SPUSubtarget::SPUSubtarget(const std::string &TT, const std::string &FS) :
StackAlignment(16),
ProcDirective(SPU::DEFAULT_PROC),
UseLargeMem(false)
{
// Should be the target SPU processor type. For now, since there's only
// one, simply default to the current "v0" default:
std::string default_cpu("v0");
// Parse features string.
ParseSubtargetFeatures(FS, default_cpu);
}
/// SetJITMode - This is called to inform the subtarget info that we are
/// producing code for the JIT.
void SPUSubtarget::SetJITMode() {
}
/// Enable PostRA scheduling for optimization levels -O2 and -O3.
bool SPUSubtarget::enablePostRAScheduler(
CodeGenOpt::Level OptLevel,
TargetSubtarget::AntiDepBreakMode& Mode,
RegClassVector& CriticalPathRCs) const {
Mode = TargetSubtarget::ANTIDEP_CRITICAL;
// CriticalPathsRCs seems to be the set of
// RegisterClasses that antidep breakings are performed for.
// Do it for all register classes
CriticalPathRCs.clear();
CriticalPathRCs.push_back(&SPU::R8CRegClass);
CriticalPathRCs.push_back(&SPU::R16CRegClass);
CriticalPathRCs.push_back(&SPU::R32CRegClass);
CriticalPathRCs.push_back(&SPU::R32FPRegClass);
CriticalPathRCs.push_back(&SPU::R64CRegClass);
CriticalPathRCs.push_back(&SPU::VECREGRegClass);
return OptLevel >= CodeGenOpt::Default;
}