[MC][Mips] Rename MipsMCAsmInfo to MipsELFMCAsmInfo (llvm#112592)

hpoussin · smallp-o-p · commit 18384d710e88 · 2024-11-03T01:23:04.000-04:00
Also change MipsAsmPrinter::emitStartOfAsmFile to emit ELF-related
sections only when using ELF output file format.
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp
@@ -16,10 +16,10 @@
 
 using namespace llvm;
 
-void MipsMCAsmInfo::anchor() { }
+void MipsELFMCAsmInfo::anchor() {}
 
-MipsMCAsmInfo::MipsMCAsmInfo(const Triple &TheTriple,
-                             const MCTargetOptions &Options) {
+MipsELFMCAsmInfo::MipsELFMCAsmInfo(const Triple &TheTriple,
+                                   const MCTargetOptions &Options) {
   IsLittleEndian = TheTriple.isLittleEndian();
 
   MipsABIInfo ABI = MipsABIInfo::computeTargetABI(TheTriple, "", Options);
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.h
@@ -18,12 +18,12 @@
 namespace llvm {
 class Triple;
 
-class MipsMCAsmInfo : public MCAsmInfoELF {
+class MipsELFMCAsmInfo : public MCAsmInfoELF {
   void anchor() override;
 
 public:
-  explicit MipsMCAsmInfo(const Triple &TheTriple,
-                         const MCTargetOptions &Options);
+  explicit MipsELFMCAsmInfo(const Triple &TheTriple,
+                            const MCTargetOptions &Options);
 };
 
 } // namespace llvm
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
@@ -84,7 +84,7 @@ static MCSubtargetInfo *createMipsMCSubtargetInfo(const Triple &TT,
 static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI,
                                       const Triple &TT,
                                       const MCTargetOptions &Options) {
-  MCAsmInfo *MAI = new MipsMCAsmInfo(TT, Options);
+  MCAsmInfo *MAI = new MipsELFMCAsmInfo(TT, Options);
 
   unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);
   MCCFIInstruction Inst = MCCFIInstruction::createDefCfaRegister(nullptr, SP);
diff --git a/llvm/lib/Target/Mips/MipsAsmPrinter.cpp b/llvm/lib/Target/Mips/MipsAsmPrinter.cpp
@@ -730,70 +730,73 @@ printRegisterList(const MachineInstr *MI, int opNum, raw_ostream &O) {
 }
 
 void MipsAsmPrinter::emitStartOfAsmFile(Module &M) {
-  MipsTargetStreamer &TS = getTargetStreamer();
-
-  // MipsTargetStreamer has an initialization order problem when emitting an
-  // object file directly (see MipsTargetELFStreamer for full details). Work
-  // around it by re-initializing the PIC state here.
-  TS.setPic(OutContext.getObjectFileInfo()->isPositionIndependent());
-
-  // Try to get target-features from the first function.
-  StringRef FS = TM.getTargetFeatureString();
-  Module::iterator F = M.begin();
-  if (FS.empty() && M.size() && F->hasFnAttribute("target-features"))
-    FS = F->getFnAttribute("target-features").getValueAsString();
-
-  // Compute MIPS architecture attributes based on the default subtarget
-  // that we'd have constructed.
-  // FIXME: For ifunc related functions we could iterate over and look
-  // for a feature string that doesn't match the default one.
   const Triple &TT = TM.getTargetTriple();
-  StringRef CPU = MIPS_MC::selectMipsCPU(TT, TM.getTargetCPU());
-  const MipsTargetMachine &MTM = static_cast<const MipsTargetMachine &>(TM);
-  const MipsSubtarget STI(TT, CPU, FS, MTM.isLittleEndian(), MTM, std::nullopt);
-
-  bool IsABICalls = STI.isABICalls();
-  const MipsABIInfo &ABI = MTM.getABI();
-  if (IsABICalls) {
-    TS.emitDirectiveAbiCalls();
-    // FIXME: This condition should be a lot more complicated that it is here.
-    //        Ideally it should test for properties of the ABI and not the ABI
-    //        itself.
-    //        For the moment, I'm only correcting enough to make MIPS-IV work.
-    if (!isPositionIndependent() && STI.hasSym32())
-      TS.emitDirectiveOptionPic0();
-  }
 
-  // Tell the assembler which ABI we are using
-  std::string SectionName = std::string(".mdebug.") + getCurrentABIString();
-  OutStreamer->switchSection(
-      OutContext.getELFSection(SectionName, ELF::SHT_PROGBITS, 0));
+  if (TT.isOSBinFormatELF()) {
+    MipsTargetStreamer &TS = getTargetStreamer();
+
+    // MipsTargetStreamer has an initialization order problem when emitting an
+    // object file directly (see MipsTargetELFStreamer for full details). Work
+    // around it by re-initializing the PIC state here.
+    TS.setPic(OutContext.getObjectFileInfo()->isPositionIndependent());
+
+    // Try to get target-features from the first function.
+    StringRef FS = TM.getTargetFeatureString();
+    Module::iterator F = M.begin();
+    if (FS.empty() && M.size() && F->hasFnAttribute("target-features"))
+      FS = F->getFnAttribute("target-features").getValueAsString();
+
+    // Compute MIPS architecture attributes based on the default subtarget
+    // that we'd have constructed.
+    // FIXME: For ifunc related functions we could iterate over and look
+    // for a feature string that doesn't match the default one.
+    StringRef CPU = MIPS_MC::selectMipsCPU(TT, TM.getTargetCPU());
+    const MipsTargetMachine &MTM = static_cast<const MipsTargetMachine &>(TM);
+    const MipsSubtarget STI(TT, CPU, FS, MTM.isLittleEndian(), MTM,
+                            std::nullopt);
+
+    bool IsABICalls = STI.isABICalls();
+    const MipsABIInfo &ABI = MTM.getABI();
+    if (IsABICalls) {
+      TS.emitDirectiveAbiCalls();
+      // FIXME: This condition should be a lot more complicated that it is here.
+      //        Ideally it should test for properties of the ABI and not the ABI
+      //        itself.
+      //        For the moment, I'm only correcting enough to make MIPS-IV work.
+      if (!isPositionIndependent() && STI.hasSym32())
+        TS.emitDirectiveOptionPic0();
+    }
+
+    // Tell the assembler which ABI we are using
+    std::string SectionName = std::string(".mdebug.") + getCurrentABIString();
+    OutStreamer->switchSection(
+        OutContext.getELFSection(SectionName, ELF::SHT_PROGBITS, 0));
 
-  // NaN: At the moment we only support:
-  // 1. .nan legacy (default)
-  // 2. .nan 2008
-  STI.isNaN2008() ? TS.emitDirectiveNaN2008()
-                  : TS.emitDirectiveNaNLegacy();
+    // NaN: At the moment we only support:
+    // 1. .nan legacy (default)
+    // 2. .nan 2008
+    STI.isNaN2008() ? TS.emitDirectiveNaN2008() : TS.emitDirectiveNaNLegacy();
 
-  // TODO: handle O64 ABI
+    // TODO: handle O64 ABI
 
-  TS.updateABIInfo(STI);
+    TS.updateABIInfo(STI);
 
-  // We should always emit a '.module fp=...' but binutils 2.24 does not accept
-  // it. We therefore emit it when it contradicts the ABI defaults (-mfpxx or
-  // -mfp64) and omit it otherwise.
-  if ((ABI.IsO32() && (STI.isABI_FPXX() || STI.isFP64bit())) ||
-      STI.useSoftFloat())
-    TS.emitDirectiveModuleFP();
+    // We should always emit a '.module fp=...' but binutils 2.24 does not
+    // accept it. We therefore emit it when it contradicts the ABI defaults
+    // (-mfpxx or -mfp64) and omit it otherwise.
+    if ((ABI.IsO32() && (STI.isABI_FPXX() || STI.isFP64bit())) ||
+        STI.useSoftFloat())
+      TS.emitDirectiveModuleFP();
 
-  // We should always emit a '.module [no]oddspreg' but binutils 2.24 does not
-  // accept it. We therefore emit it when it contradicts the default or an
-  // option has changed the default (i.e. FPXX) and omit it otherwise.
-  if (ABI.IsO32() && (!STI.useOddSPReg() || STI.isABI_FPXX()))
-    TS.emitDirectiveModuleOddSPReg();
+    // We should always emit a '.module [no]oddspreg' but binutils 2.24 does not
+    // accept it. We therefore emit it when it contradicts the default or an
+    // option has changed the default (i.e. FPXX) and omit it otherwise.
+    if (ABI.IsO32() && (!STI.useOddSPReg() || STI.isABI_FPXX()))
+      TS.emitDirectiveModuleOddSPReg();
 
-  // Switch to the .text section.
-  OutStreamer->switchSection(getObjFileLowering().getTextSection());
+    // Switch to the .text section.
+    OutStreamer->switchSection(getObjFileLowering().getTextSection());
+  }
 }
 
 void MipsAsmPrinter::emitInlineAsmStart() const {
diff --git a/llvm/lib/Target/Mips/MipsTargetMachine.cpp b/llvm/lib/Target/Mips/MipsTargetMachine.cpp
@@ -70,6 +70,10 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMipsTarget() {
   initializeMipsDAGToDAGISelLegacyPass(*PR);
 }
 
+static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
+  return std::make_unique<MipsTargetObjectFile>();
+}
+
 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
                                      const TargetOptions &Options,
                                      bool isLittle) {
@@ -128,7 +132,7 @@ MipsTargetMachine::MipsTargetMachine(const Target &T, const Triple &TT,
     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options, isLittle), TT,
                         CPU, FS, Options, getEffectiveRelocModel(JIT, RM),
                         getEffectiveCodeModel(CM, CodeModel::Small), OL),
-      isLittle(isLittle), TLOF(std::make_unique<MipsTargetObjectFile>()),
+      isLittle(isLittle), TLOF(createTLOF(getTargetTriple())),
       ABI(MipsABIInfo::computeTargetABI(TT, CPU, Options.MCOptions)),
       Subtarget(nullptr),
       DefaultSubtarget(TT, CPU, FS, isLittle, *this, std::nullopt),
diff --git a/llvm/test/CodeGen/Mips/no-odd-spreg.ll b/llvm/test/CodeGen/Mips/no-odd-spreg.ll
@@ -1,12 +1,12 @@
-; RUN: llc -march=mipsel -mcpu=mips32 < %s \
+; RUN: llc -mtriple=mipsel-elf -mcpu=mips32 < %s \
 ; RUN:   | FileCheck %s -check-prefixes=ALL,ODDSPREG,ODDSPREG-NO-EMIT
-; RUN: llc -march=mipsel -mcpu=mips32 -mattr=+nooddspreg < %s \
+; RUN: llc -mtriple=mipsel-elf -mcpu=mips32 -mattr=+nooddspreg < %s \
 ; RUN:   | FileCheck %s -check-prefixes=ALL,NOODDSPREG
-; RUN: llc -march=mipsel -mcpu=mips32r6 -mattr=fp64 < %s \
+; RUN: llc -mtriple=mipsel-elf -mcpu=mips32r6 -mattr=fp64 < %s \
 ; RUN:   | FileCheck %s -check-prefixes=ALL,ODDSPREG,ODDSPREG-NO-EMIT
-; RUN: llc -march=mipsel -mcpu=mips32r6 -mattr=fp64,+nooddspreg < %s \
+; RUN: llc -mtriple=mipsel-elf -mcpu=mips32r6 -mattr=fp64,+nooddspreg < %s \
 ; RUN:   | FileCheck %s -check-prefixes=ALL,NOODDSPREG
-; RUN: llc -march=mipsel -mcpu=mips32r6 -mattr=fpxx,-nooddspreg < %s \
+; RUN: llc -mtriple=mipsel-elf -mcpu=mips32r6 -mattr=fpxx,-nooddspreg < %s \
 ; RUN:   | FileCheck %s -check-prefixes=ALL,ODDSPREG,ODDSPREG-EMIT
 
 ; We don't emit a directive unless we need to. This is to support versions of
