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https://github.com/c64scene-ar/llvm-6502.git
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33f01f9848
This matches the data in clang which was added by Jakob Stoklund Olesen in r179596. Thanks for erikjv on irc for pointing me to the relevant documents: http://sparc.com/standards/64.psabi.1.35.ps.Z page 25: Every stack frame must be 16-byte aligned. http://sparc.com/standards/psABI3rd.pdf page 3-10: Although the architecture requires only word alignment, software convention and the operating system require every stack frame to be doubleword aligned. I tried to add a test, but it looks like sparc doesn't implement dynamic stack realignment. This will be tested in clang shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197646 91177308-0d34-0410-b5e6-96231b3b80d8
132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
//===-- SparcTargetMachine.cpp - Define TargetMachine for Sparc -----------===//
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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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//
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//===----------------------------------------------------------------------===//
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#include "SparcTargetMachine.h"
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#include "Sparc.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/PassManager.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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extern "C" void LLVMInitializeSparcTarget() {
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// Register the target.
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RegisterTargetMachine<SparcV8TargetMachine> X(TheSparcTarget);
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RegisterTargetMachine<SparcV9TargetMachine> Y(TheSparcV9Target);
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}
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static std::string computeDataLayout(const SparcSubtarget &ST) {
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// Sparc is big endian.
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std::string Ret = "E";
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// Some ABIs have 32bit pointers.
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if (!ST.is64Bit())
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Ret += "-p:32:32";
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// Alignments for 64 bit integers.
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Ret += "-i64:64";
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// On SparcV9 128 floats are aligned to 128 bits, on others only to 64.
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// On SparcV9 registers can hold 64 or 32 bits, on others only 32.
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if (ST.is64Bit())
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Ret += "-n32:64";
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else
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Ret += "-f128:64-n32";
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if (ST.is64Bit())
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Ret += "-S128";
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else
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Ret += "-S64";
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return Ret;
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}
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/// SparcTargetMachine ctor - Create an ILP32 architecture model
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///
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SparcTargetMachine::SparcTargetMachine(const Target &T, StringRef TT,
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StringRef CPU, StringRef FS,
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const TargetOptions &Options,
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Reloc::Model RM, CodeModel::Model CM,
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CodeGenOpt::Level OL,
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bool is64bit)
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: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
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Subtarget(TT, CPU, FS, is64bit),
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DL(computeDataLayout(Subtarget)),
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InstrInfo(Subtarget),
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TLInfo(*this), TSInfo(*this),
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FrameLowering(Subtarget) {
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initAsmInfo();
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}
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namespace {
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/// Sparc Code Generator Pass Configuration Options.
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class SparcPassConfig : public TargetPassConfig {
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public:
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SparcPassConfig(SparcTargetMachine *TM, PassManagerBase &PM)
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: TargetPassConfig(TM, PM) {}
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SparcTargetMachine &getSparcTargetMachine() const {
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return getTM<SparcTargetMachine>();
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}
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virtual bool addInstSelector();
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virtual bool addPreEmitPass();
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};
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} // namespace
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TargetPassConfig *SparcTargetMachine::createPassConfig(PassManagerBase &PM) {
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return new SparcPassConfig(this, PM);
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}
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bool SparcPassConfig::addInstSelector() {
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addPass(createSparcISelDag(getSparcTargetMachine()));
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return false;
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}
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bool SparcTargetMachine::addCodeEmitter(PassManagerBase &PM,
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JITCodeEmitter &JCE) {
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// Machine code emitter pass for Sparc.
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PM.add(createSparcJITCodeEmitterPass(*this, JCE));
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return false;
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}
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/// addPreEmitPass - This pass may be implemented by targets that want to run
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/// passes immediately before machine code is emitted. This should return
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/// true if -print-machineinstrs should print out the code after the passes.
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bool SparcPassConfig::addPreEmitPass(){
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addPass(createSparcDelaySlotFillerPass(getSparcTargetMachine()));
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return true;
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}
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void SparcV8TargetMachine::anchor() { }
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SparcV8TargetMachine::SparcV8TargetMachine(const Target &T,
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StringRef TT, StringRef CPU,
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StringRef FS,
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const TargetOptions &Options,
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Reloc::Model RM,
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CodeModel::Model CM,
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CodeGenOpt::Level OL)
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: SparcTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {
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}
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void SparcV9TargetMachine::anchor() { }
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SparcV9TargetMachine::SparcV9TargetMachine(const Target &T,
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StringRef TT, StringRef CPU,
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StringRef FS,
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const TargetOptions &Options,
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Reloc::Model RM,
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CodeModel::Model CM,
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CodeGenOpt::Level OL)
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: SparcTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {
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}
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