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[MC][Mips] Add MipsWinCOFFObjectWriter/MipsWinCOFFStreamer
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11 files changed

+213
-1
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11 files changed

+213
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‎llvm/lib/Target/Mips/MCTargetDesc/CMakeLists.txt‎

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@@ -12,6 +12,8 @@ add_llvm_component_library(LLVMMipsDesc
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MipsNaClELFStreamer.cpp
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MipsOptionRecord.cpp
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MipsTargetStreamer.cpp
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MipsWinCOFFObjectWriter.cpp
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MipsWinCOFFStreamer.cpp
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LINK_COMPONENTS
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CodeGenTypes

‎llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp‎

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@@ -597,10 +597,30 @@ bool MipsAsmBackend::isMicroMips(const MCSymbol *Sym) const {
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return false;
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}
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namespace {
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class WindowsMipsAsmBackend : public MipsAsmBackend {
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public:
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WindowsMipsAsmBackend(const Target &T, const MCRegisterInfo &MRI,
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const MCSubtargetInfo &STI)
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: MipsAsmBackend(T, MRI, STI.getTargetTriple(), STI.getCPU(), false) {}
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std::unique_ptr<MCObjectTargetWriter>
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createObjectTargetWriter() const override {
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return createMipsWinCOFFObjectWriter();
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}
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};
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} // end anonymous namespace
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600616
MCAsmBackend *llvm::createMipsAsmBackend(const Target &T,
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const MCSubtargetInfo &STI,
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const MCRegisterInfo &MRI,
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const MCTargetOptions &Options) {
620+
const Triple &TheTriple = STI.getTargetTriple();
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if (TheTriple.isOSWindows() && TheTriple.isOSBinFormatCOFF())
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return new WindowsMipsAsmBackend(T, MRI, STI);
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604624
MipsABIInfo ABI = MipsABIInfo::computeTargetABI(STI.getTargetTriple(),
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STI.getCPU(), Options);
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return new MipsAsmBackend(T, MRI, STI.getTargetTriple(), STI.getCPU(),

‎llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp‎

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Original file line numberDiff line numberDiff line change
@@ -51,3 +51,14 @@ MipsELFMCAsmInfo::MipsELFMCAsmInfo(const Triple &TheTriple,
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DwarfRegNumForCFI = true;
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HasMipsExpressions = true;
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}
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void MipsCOFFMCAsmInfo::anchor() {}
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MipsCOFFMCAsmInfo::MipsCOFFMCAsmInfo() {
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HasSingleParameterDotFile = true;
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WinEHEncodingType = WinEH::EncodingType::Itanium;
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ExceptionsType = ExceptionHandling::WinEH;
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AllowAtInName = true;
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}

‎llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.h‎

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@@ -13,6 +13,7 @@
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#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCASMINFO_H
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#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCASMINFO_H
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16+
#include "llvm/MC/MCAsmInfoCOFF.h"
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#include "llvm/MC/MCAsmInfoELF.h"
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namespace llvm {
@@ -26,6 +27,13 @@ class MipsELFMCAsmInfo : public MCAsmInfoELF {
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const MCTargetOptions &Options);
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};
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30+
class MipsCOFFMCAsmInfo : public MCAsmInfoGNUCOFF {
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void anchor() override;
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public:
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explicit MipsCOFFMCAsmInfo();
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};
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2937
} // namespace llvm
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3139
#endif

‎llvm/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp‎

Lines changed: 17 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -45,6 +45,13 @@ using namespace llvm;
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#define GET_REGINFO_MC_DESC
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#include "MipsGenRegisterInfo.inc"
4747

48+
namespace {
49+
class MipsWinCOFFTargetStreamer : public MipsTargetStreamer {
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public:
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MipsWinCOFFTargetStreamer(MCStreamer &S) : MipsTargetStreamer(S) {}
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};
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} // end namespace
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/// Select the Mips CPU for the given triple and cpu name.
4956
StringRef MIPS_MC::selectMipsCPU(const Triple &TT, StringRef CPU) {
5057
if (CPU.empty() || CPU == "generic") {
@@ -84,7 +91,12 @@ static MCSubtargetInfo *createMipsMCSubtargetInfo(const Triple &TT,
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static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI,
8592
const Triple &TT,
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const MCTargetOptions &Options) {
87-
MCAsmInfo *MAI = new MipsELFMCAsmInfo(TT, Options);
94+
MCAsmInfo *MAI;
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if (TT.isOSWindows())
97+
MAI = new MipsCOFFMCAsmInfo();
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else
99+
MAI = new MipsELFMCAsmInfo(TT, Options);
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89101
unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);
90102
MCCFIInstruction Inst = MCCFIInstruction::createDefCfaRegister(nullptr, SP);
@@ -127,6 +139,8 @@ static MCTargetStreamer *createMipsNullTargetStreamer(MCStreamer &S) {
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128140
static MCTargetStreamer *
129141
createMipsObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
142+
if (STI.getTargetTriple().isOSBinFormatCOFF())
143+
return new MipsWinCOFFTargetStreamer(S);
130144
return new MipsTargetELFStreamer(S, STI);
131145
}
132146

@@ -186,6 +200,8 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMipsTargetMC() {
186200
TargetRegistry::RegisterNullTargetStreamer(*T,
187201
createMipsNullTargetStreamer);
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203+
TargetRegistry::RegisterCOFFStreamer(*T, createMipsWinCOFFStreamer);
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189205
// Register the MC subtarget info.
190206
TargetRegistry::RegisterMCSubtargetInfo(*T, createMipsMCSubtargetInfo);
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‎llvm/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h‎

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@@ -23,7 +23,9 @@ class MCCodeEmitter;
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class MCContext;
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class MCInstrInfo;
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class MCObjectTargetWriter;
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class MCObjectWriter;
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class MCRegisterInfo;
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class MCStreamer;
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class MCSubtargetInfo;
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class MCTargetOptions;
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class StringRef;
@@ -39,8 +41,20 @@ MCAsmBackend *createMipsAsmBackend(const Target &T, const MCSubtargetInfo &STI,
3941
const MCRegisterInfo &MRI,
4042
const MCTargetOptions &Options);
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44+
/// Construct an MIPS Windows COFF machine code streamer which will generate
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/// PE/COFF format object files.
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///
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/// Takes ownership of \p AB and \p CE.
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MCStreamer *createMipsWinCOFFStreamer(MCContext &C,
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std::unique_ptr<MCAsmBackend> &&AB,
50+
std::unique_ptr<MCObjectWriter> &&OW,
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std::unique_ptr<MCCodeEmitter> &&CE);
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/// Construct a Mips ELF object writer.
4254
std::unique_ptr<MCObjectTargetWriter>
4355
createMipsELFObjectWriter(const Triple &TT, bool IsN32);
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/// Construct a Mips Win COFF object writer.
57+
std::unique_ptr<MCObjectTargetWriter> createMipsWinCOFFObjectWriter();
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4559
namespace MIPS_MC {
4660
StringRef selectMipsCPU(const Triple &TT, StringRef CPU);

‎llvm/lib/Target/Mips/MCTargetDesc/MipsWinCOFFObjectWriter.cpp‎

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@@ -0,0 +1,57 @@
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//===- MipsWinCOFFObjectWriter.cpp------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===---------------------------------------------------------------------===//
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#include "MCTargetDesc/MipsFixupKinds.h"
10+
#include "MCTargetDesc/MipsMCTargetDesc.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCWinCOFFObjectWriter.h"
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using namespace llvm;
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namespace {
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class MipsWinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
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public:
21+
MipsWinCOFFObjectWriter();
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unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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const MCFixup &Fixup, bool IsCrossSection,
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const MCAsmBackend &MAB) const override;
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};
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} // end anonymous namespace
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MipsWinCOFFObjectWriter::MipsWinCOFFObjectWriter()
31+
: MCWinCOFFObjectTargetWriter(COFF::IMAGE_FILE_MACHINE_R4000) {}
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unsigned MipsWinCOFFObjectWriter::getRelocType(MCContext &Ctx,
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const MCValue &Target,
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const MCFixup &Fixup,
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bool IsCrossSection,
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const MCAsmBackend &MAB) const {
38+
unsigned FixupKind = Fixup.getKind();
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40+
switch (FixupKind) {
41+
case FK_Data_4:
42+
return COFF::IMAGE_REL_MIPS_REFWORD;
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case Mips::fixup_Mips_26:
44+
return COFF::IMAGE_REL_MIPS_JMPADDR;
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case Mips::fixup_Mips_HI16:
46+
return COFF::IMAGE_REL_MIPS_REFHI;
47+
case Mips::fixup_Mips_LO16:
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return COFF::IMAGE_REL_MIPS_REFLO;
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default:
50+
Ctx.reportError(Fixup.getLoc(), "unsupported relocation type");
51+
return COFF::IMAGE_REL_MIPS_REFWORD;
52+
}
53+
}
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55+
std::unique_ptr<MCObjectTargetWriter> llvm::createMipsWinCOFFObjectWriter() {
56+
return std::make_unique<MipsWinCOFFObjectWriter>();
57+
}

‎llvm/lib/Target/Mips/MCTargetDesc/MipsWinCOFFStreamer.cpp‎

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@@ -0,0 +1,33 @@
1+
//===- MipsWinCOFFStreamer.cpp-----------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4+
// See https://llvm.org/LICENSE.txt for license information.
5+
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===---------------------------------------------------------------------===//
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9+
#include "MipsMCTargetDesc.h"
10+
#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCCodeEmitter.h"
13+
#include "llvm/MC/MCObjectWriter.h"
14+
#include "llvm/MC/MCWinCOFFStreamer.h"
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using namespace llvm;
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18+
namespace {
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class MipsWinCOFFStreamer : public MCWinCOFFStreamer {
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public:
21+
MipsWinCOFFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> AB,
22+
std::unique_ptr<MCCodeEmitter> CE,
23+
std::unique_ptr<MCObjectWriter> OW)
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: MCWinCOFFStreamer(C, std::move(AB), std::move(CE), std::move(OW)) {}
25+
};
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} // namespace
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28+
MCStreamer *llvm::createMipsWinCOFFStreamer(
29+
MCContext &C, std::unique_ptr<MCAsmBackend> &&AB,
30+
std::unique_ptr<MCObjectWriter> &&OW, std::unique_ptr<MCCodeEmitter> &&CE) {
31+
return new MipsWinCOFFStreamer(C, std::move(AB), std::move(CE),
32+
std::move(OW));
33+
}

‎llvm/lib/Target/Mips/MipsTargetMachine.cpp‎

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@@ -71,6 +71,8 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMipsTarget() {
7171
}
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7373
static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
74+
if (TT.isOSBinFormatCOFF())
75+
return std::make_unique<TargetLoweringObjectFileCOFF>();
7476
return std::make_unique<MipsTargetObjectFile>();
7577
}
7678

‎llvm/test/MC/Mips/coff-basic.ll‎

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@@ -0,0 +1,7 @@
1+
; RUN: llc -mtriple mipsel-windows -filetype=obj < %s | obj2yaml | FileCheck %s
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3+
define i32 @foo() {
4+
ret i32 0
5+
}
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7+
; CHECK: Machine: IMAGE_FILE_MACHINE_R4000

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