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