[clang][CodeGen] Break up TargetInfo.cpp [8/8]

This commit breaks up CodeGen/TargetInfo.cpp into a set of *.cpp files,
one file per target. There are no functional changes, mostly just code moving.

Non-code-moving changes are:
* A virtual destructor has been added to DefaultABIInfo to pin the vtable to a cpp file.
* A few methods of ABIInfo and DefaultABIInfo were split into declaration + definition
  in order to reduce the number of transitive includes.
* Several functions that used to be static have been placed in clang::CodeGen
  namespace so that they can be accessed from other cpp files.

RFC: https://discourse.llvm.org/t/rfc-splitting-clangs-targetinfo-cpp/69883

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D148094

1 files changed, 226 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 8b2fa5eaf5ba..7a4b81a48f72 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -100,6 +100,228 @@ static CGCXXABI *createCXXABI(CodeGenModule &CGM) {
   llvm_unreachable("invalid C++ ABI kind");
 }
 
+static std::unique_ptr<TargetCodeGenInfo>
+createTargetCodeGenInfo(CodeGenModule &CGM) {
+  const TargetInfo &Target = CGM.getTarget();
+  const llvm::Triple &Triple = Target.getTriple();
+  const CodeGenOptions &CodeGenOpts = CGM.getCodeGenOpts();
+
+  switch (Triple.getArch()) {
+  default:
+    return createDefaultTargetCodeGenInfo(CGM);
+
+  case llvm::Triple::le32:
+    return createPNaClTargetCodeGenInfo(CGM);
+  case llvm::Triple::m68k:
+    return createM68kTargetCodeGenInfo(CGM);
+  case llvm::Triple::mips:
+  case llvm::Triple::mipsel:
+    if (Triple.getOS() == llvm::Triple::NaCl)
+      return createPNaClTargetCodeGenInfo(CGM);
+    return createMIPSTargetCodeGenInfo(CGM, /*IsOS32=*/true);
+
+  case llvm::Triple::mips64:
+  case llvm::Triple::mips64el:
+    return createMIPSTargetCodeGenInfo(CGM, /*IsOS32=*/false);
+
+  case llvm::Triple::avr: {
+    // For passing parameters, R8~R25 are used on avr, and R18~R25 are used
+    // on avrtiny. For passing return value, R18~R25 are used on avr, and
+    // R22~R25 are used on avrtiny.
+    unsigned NPR = Target.getABI() == "avrtiny" ? 6 : 18;
+    unsigned NRR = Target.getABI() == "avrtiny" ? 4 : 8;
+    return createAVRTargetCodeGenInfo(CGM, NPR, NRR);
+  }
+
+  case llvm::Triple::aarch64:
+  case llvm::Triple::aarch64_32:
+  case llvm::Triple::aarch64_be: {
+    AArch64ABIKind Kind = AArch64ABIKind::AAPCS;
+    if (Target.getABI() == "darwinpcs")
+      Kind = AArch64ABIKind::DarwinPCS;
+    else if (Triple.isOSWindows())
+      return createWindowsAArch64TargetCodeGenInfo(CGM, AArch64ABIKind::Win64);
+
+    return createAArch64TargetCodeGenInfo(CGM, Kind);
+  }
+
+  case llvm::Triple::wasm32:
+  case llvm::Triple::wasm64: {
+    WebAssemblyABIKind Kind = WebAssemblyABIKind::MVP;
+    if (Target.getABI() == "experimental-mv")
+      Kind = WebAssemblyABIKind::ExperimentalMV;
+    return createWebAssemblyTargetCodeGenInfo(CGM, Kind);
+  }
+
+  case llvm::Triple::arm:
+  case llvm::Triple::armeb:
+  case llvm::Triple::thumb:
+  case llvm::Triple::thumbeb: {
+    if (Triple.getOS() == llvm::Triple::Win32)
+      return createWindowsARMTargetCodeGenInfo(CGM, ARMABIKind::AAPCS_VFP);
+
+    ARMABIKind Kind = ARMABIKind::AAPCS;
+    StringRef ABIStr = Target.getABI();
+    if (ABIStr == "apcs-gnu")
+      Kind = ARMABIKind::APCS;
+    else if (ABIStr == "aapcs16")
+      Kind = ARMABIKind::AAPCS16_VFP;
+    else if (CodeGenOpts.FloatABI == "hard" ||
+             (CodeGenOpts.FloatABI != "soft" &&
+              (Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
+               Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
+               Triple.getEnvironment() == llvm::Triple::EABIHF)))
+      Kind = ARMABIKind::AAPCS_VFP;
+
+    return createARMTargetCodeGenInfo(CGM, Kind);
+  }
+
+  case llvm::Triple::ppc: {
+    if (Triple.isOSAIX())
+      return createAIXTargetCodeGenInfo(CGM, /*Is64Bit=*/false);
+
+    bool IsSoftFloat =
+        CodeGenOpts.FloatABI == "soft" || Target.hasFeature("spe");
+    return createPPC32TargetCodeGenInfo(CGM, IsSoftFloat);
+  }
+  case llvm::Triple::ppcle: {
+    bool IsSoftFloat = CodeGenOpts.FloatABI == "soft";
+    return createPPC32TargetCodeGenInfo(CGM, IsSoftFloat);
+  }
+  case llvm::Triple::ppc64:
+    if (Triple.isOSAIX())
+      return createAIXTargetCodeGenInfo(CGM, /*Is64Bit=*/true);
+
+    if (Triple.isOSBinFormatELF()) {
+      PPC64_SVR4_ABIKind Kind = PPC64_SVR4_ABIKind::ELFv1;
+      if (Target.getABI() == "elfv2")
+        Kind = PPC64_SVR4_ABIKind::ELFv2;
+      bool IsSoftFloat = CodeGenOpts.FloatABI == "soft";
+
+      return createPPC64_SVR4_TargetCodeGenInfo(CGM, Kind, IsSoftFloat);
+    }
+    return createPPC64TargetCodeGenInfo(CGM);
+  case llvm::Triple::ppc64le: {
+    assert(Triple.isOSBinFormatELF() && "PPC64 LE non-ELF not supported!");
+    PPC64_SVR4_ABIKind Kind = PPC64_SVR4_ABIKind::ELFv2;
+    if (Target.getABI() == "elfv1")
+      Kind = PPC64_SVR4_ABIKind::ELFv1;
+    bool IsSoftFloat = CodeGenOpts.FloatABI == "soft";
+
+    return createPPC64_SVR4_TargetCodeGenInfo(CGM, Kind, IsSoftFloat);
+  }
+
+  case llvm::Triple::nvptx:
+  case llvm::Triple::nvptx64:
+    return createNVPTXTargetCodeGenInfo(CGM);
+
+  case llvm::Triple::msp430:
+    return createMSP430TargetCodeGenInfo(CGM);
+
+  case llvm::Triple::riscv32:
+  case llvm::Triple::riscv64: {
+    StringRef ABIStr = Target.getABI();
+    unsigned XLen = Target.getPointerWidth(LangAS::Default);
+    unsigned ABIFLen = 0;
+    if (ABIStr.endswith("f"))
+      ABIFLen = 32;
+    else if (ABIStr.endswith("d"))
+      ABIFLen = 64;
+    return createRISCVTargetCodeGenInfo(CGM, XLen, ABIFLen);
+  }
+
+  case llvm::Triple::systemz: {
+    bool SoftFloat = CodeGenOpts.FloatABI == "soft";
+    bool HasVector = !SoftFloat && Target.getABI() == "vector";
+    return createSystemZTargetCodeGenInfo(CGM, HasVector, SoftFloat);
+  }
+
+  case llvm::Triple::tce:
+  case llvm::Triple::tcele:
+    return createTCETargetCodeGenInfo(CGM);
+
+  case llvm::Triple::x86: {
+    bool IsDarwinVectorABI = Triple.isOSDarwin();
+    bool IsWin32FloatStructABI = Triple.isOSWindows() && !Triple.isOSCygMing();
+
+    if (Triple.getOS() == llvm::Triple::Win32) {
+      return createWinX86_32TargetCodeGenInfo(
+          CGM, IsDarwinVectorABI, IsWin32FloatStructABI,
+          CodeGenOpts.NumRegisterParameters);
+    }
+    return createX86_32TargetCodeGenInfo(
+        CGM, IsDarwinVectorABI, IsWin32FloatStructABI,
+        CodeGenOpts.NumRegisterParameters, CodeGenOpts.FloatABI == "soft");
+  }
+
+  case llvm::Triple::x86_64: {
+    StringRef ABI = Target.getABI();
+    X86AVXABILevel AVXLevel = (ABI == "avx512" ? X86AVXABILevel::AVX512
+                               : ABI == "avx"  ? X86AVXABILevel::AVX
+                                               : X86AVXABILevel::None);
+
+    switch (Triple.getOS()) {
+    case llvm::Triple::Win32:
+      return createWinX86_64TargetCodeGenInfo(CGM, AVXLevel);
+    default:
+      return createX86_64TargetCodeGenInfo(CGM, AVXLevel);
+    }
+  }
+  case llvm::Triple::hexagon:
+    return createHexagonTargetCodeGenInfo(CGM);
+  case llvm::Triple::lanai:
+    return createLanaiTargetCodeGenInfo(CGM);
+  case llvm::Triple::r600:
+    return createAMDGPUTargetCodeGenInfo(CGM);
+  case llvm::Triple::amdgcn:
+    return createAMDGPUTargetCodeGenInfo(CGM);
+  case llvm::Triple::sparc:
+    return createSparcV8TargetCodeGenInfo(CGM);
+  case llvm::Triple::sparcv9:
+    return createSparcV9TargetCodeGenInfo(CGM);
+  case llvm::Triple::xcore:
+    return createXCoreTargetCodeGenInfo(CGM);
+  case llvm::Triple::arc:
+    return createARCTargetCodeGenInfo(CGM);
+  case llvm::Triple::spir:
+  case llvm::Triple::spir64:
+    return createCommonSPIRTargetCodeGenInfo(CGM);
+  case llvm::Triple::spirv32:
+  case llvm::Triple::spirv64:
+    return createSPIRVTargetCodeGenInfo(CGM);
+  case llvm::Triple::ve:
+    return createVETargetCodeGenInfo(CGM);
+  case llvm::Triple::csky: {
+    bool IsSoftFloat = !Target.hasFeature("hard-float-abi");
+    bool hasFP64 =
+        Target.hasFeature("fpuv2_df") || Target.hasFeature("fpuv3_df");
+    return createCSKYTargetCodeGenInfo(CGM, IsSoftFloat ? 0
+                                            : hasFP64   ? 64
+                                                        : 32);
+  }
+  case llvm::Triple::bpfeb:
+  case llvm::Triple::bpfel:
+    return createBPFTargetCodeGenInfo(CGM);
+  case llvm::Triple::loongarch32:
+  case llvm::Triple::loongarch64: {
+    StringRef ABIStr = Target.getABI();
+    unsigned ABIFRLen = 0;
+    if (ABIStr.endswith("f"))
+      ABIFRLen = 32;
+    else if (ABIStr.endswith("d"))
+      ABIFRLen = 64;
+    return createLoongArchTargetCodeGenInfo(
+        CGM, Target.getPointerWidth(LangAS::Default), ABIFRLen);
+  }
+  }
+}
+
+const TargetCodeGenInfo &CodeGenModule::getTargetCodeGenInfo() {
+  if (!TheTargetCodeGenInfo)
+    TheTargetCodeGenInfo = createTargetCodeGenInfo(*this);
+  return *TheTargetCodeGenInfo;
+}
+
 CodeGenModule::CodeGenModule(ASTContext &C,
                              IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS,
                              const HeaderSearchOptions &HSO,
@@ -4849,6 +5071,10 @@ static bool shouldBeInCOMDAT(CodeGenModule &CGM, const Decl &D) {
   llvm_unreachable("No such linkage");
 }
 
+bool CodeGenModule::supportsCOMDAT() const {
+  return getTriple().supportsCOMDAT();
+}
+
 void CodeGenModule::maybeSetTrivialComdat(const Decl &D,
                                           llvm::GlobalObject &GO) {
   if (!shouldBeInCOMDAT(*this, D))