Bring back r250262: PS4 toolchain

There was a minor problem with a test. Sorry for the noise yesterday.

This patch adds missing pieces to clang, including the PS4 toolchain
definition, added warnings, PS4 defaults, and Driver changes needed for
our compiler.

A patch by Filipe Cabecinhas, Pierre Gousseau and Katya Romanova!

Differential Revision: http://reviews.llvm.org/D13482

llvm-svn: 250293

clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -196,4 +196,18 @@ def warn_target_unsupported_nan2008 : Warning<
 def warn_target_unsupported_nanlegacy : Warning<
   "ignoring '-mnan=legacy' option because the '%0' architecture does not support it">,
   InGroup<UnsupportedNan>;
+
+def warn_drv_unable_to_find_directory_expected : Warning<
+  "unable to find %0 directory, expected to be in '%1'">,
+  InGroup<InvalidOrNonExistentDirectory>, DefaultIgnore;
+
+def warn_drv_ps4_force_pic : Warning<
+  "option '%0' was ignored by the PS4 toolchain, using '-fPIC'">,
+  InGroup<OptionIgnored>;
+
+def warn_drv_ps4_sdk_dir : Warning<
+  "environment variable SCE_PS4_SDK_DIR is set, but points to invalid or nonexistent directory '%0'">,
+  InGroup<InvalidOrNonExistentDirectory>;
+
+def err_drv_unsupported_linker : Error<"unsupported value '%0' for -linker option">;
 }

clang/include/clang/Basic/DiagnosticGroups.td

@@ -823,3 +823,7 @@ def CudaCompat : DiagGroup<"cuda-compat">;
 
 // A warning group for things that will change semantics in the future.
 def FutureCompat : DiagGroup<"future-compat">;
+
+def InvalidOrNonExistentDirectory : DiagGroup<"invalid-or-nonexistent-directory">;
+
+def OptionIgnored : DiagGroup<"option-ignored">;

clang/lib/Driver/Driver.cpp

@@ -2261,6 +2261,9 @@ const ToolChain &Driver::getToolChain(const ArgList &Args,
     case llvm::Triple::CUDA:
       TC = new toolchains::CudaToolChain(*this, Target, Args);
       break;
+    case llvm::Triple::PS4:
+      TC = new toolchains::PS4CPU(*this, Target, Args);
+      break;
     default:
       // Of these targets, Hexagon is the only one that might have
       // an OS of Linux, in which case it got handled above already.

clang/lib/Driver/ToolChains.cpp

@@ -4066,3 +4066,77 @@ void WebAssembly::addClangTargetOptions(const ArgList &DriverArgs,
                          options::OPT_fno_use_init_array, true))
     CC1Args.push_back("-fuse-init-array");
 }
+
+PS4CPU::PS4CPU(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+    : Generic_ELF(D, Triple, Args) {
+  if (Args.hasArg(options::OPT_static))
+    D.Diag(diag::err_drv_unsupported_opt_for_target) << "-static" << "PS4";
+
+  // Determine where to find the PS4 libraries. We use SCE_PS4_SDK_DIR
+  // if it exists; otherwise use the driver's installation path, which
+  // should be <SDK_DIR>/host_tools/bin.
+
+  SmallString<512> PS4SDKDir;
+  if (const char *EnvValue = getenv("SCE_PS4_SDK_DIR")) {
+    if (!llvm::sys::fs::exists(EnvValue))
+      getDriver().Diag(clang::diag::warn_drv_ps4_sdk_dir) << EnvValue;
+    PS4SDKDir = EnvValue;
+  } else {
+    PS4SDKDir = getDriver().Dir;
+    llvm::sys::path::append(PS4SDKDir, "/../../");
+  } 
+
+  // By default, the driver won't report a warning if it can't find 
+  // PS4's include or lib directories. This behavior could be changed if
+  // -Weverything or -Winvalid-or-nonexistent-directory options are passed.  
+  // If -isysroot was passed, use that as the SDK base path.
+  std::string PrefixDir;
+  if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
+    PrefixDir = A->getValue();
+    if (!llvm::sys::fs::exists(PrefixDir))
+      getDriver().Diag(clang::diag::warn_missing_sysroot) << PrefixDir;
+  } else
+    PrefixDir = PS4SDKDir.str();
+
+  SmallString<512> PS4SDKIncludeDir(PrefixDir);
+  llvm::sys::path::append(PS4SDKIncludeDir, "target/include");
+  if (!Args.hasArg(options::OPT_nostdinc) &&
+      !Args.hasArg(options::OPT_nostdlibinc) &&
+      !Args.hasArg(options::OPT_isysroot) &&
+      !Args.hasArg(options::OPT__sysroot_EQ) &&
+      !llvm::sys::fs::exists(PS4SDKIncludeDir)) {
+    getDriver().Diag(clang::diag::warn_drv_unable_to_find_directory_expected)
+        << "PS4 system headers" << PS4SDKIncludeDir;
+  }
+
+  SmallString<512> PS4SDKLibDir(PS4SDKDir);
+  llvm::sys::path::append(PS4SDKLibDir, "target/lib");
+  if (!Args.hasArg(options::OPT_nostdlib) &&
+      !Args.hasArg(options::OPT_nodefaultlibs) &&
+      !Args.hasArg(options::OPT__sysroot_EQ) && !Args.hasArg(options::OPT_E) &&
+      !Args.hasArg(options::OPT_c) && !Args.hasArg(options::OPT_S) &&
+      !Args.hasArg(options::OPT_emit_ast) &&
+      !llvm::sys::fs::exists(PS4SDKLibDir)) {
+    getDriver().Diag(clang::diag::warn_drv_unable_to_find_directory_expected)
+        << "PS4 system libraries" << PS4SDKLibDir;
+    return;
+  }
+  getFilePaths().push_back(PS4SDKLibDir.str());
+}
+
+Tool *PS4CPU::buildAssembler() const {
+  return new tools::PS4cpu::Assemble(*this);
+}
+
+Tool *PS4CPU::buildLinker() const { return new tools::PS4cpu::Link(*this); }
+
+bool PS4CPU::isPICDefault() const { return true; }
+
+bool PS4CPU::HasNativeLLVMSupport() const { return true; }
+
+SanitizerMask PS4CPU::getSupportedSanitizers() const {
+  SanitizerMask Res = ToolChain::getSupportedSanitizers();
+  Res |= SanitizerKind::Address;
+  Res |= SanitizerKind::Vptr;
+  return Res;
+}

clang/lib/Driver/ToolChains.h

@@ -1015,6 +1015,27 @@ class LLVM_LIBRARY_VISIBILITY WebAssembly final : public ToolChain {
                              llvm::opt::ArgStringList &CC1Args) const override;
 };
 
+class LLVM_LIBRARY_VISIBILITY PS4CPU : public Generic_ELF {
+public:
+  PS4CPU(const Driver &D, const llvm::Triple &Triple,
+         const llvm::opt::ArgList &Args);
+
+  bool IsMathErrnoDefault() const override { return false; }
+  bool IsObjCNonFragileABIDefault() const override { return true; }
+  bool HasNativeLLVMSupport() const override;
+  bool isPICDefault() const override;
+
+  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
+    return 2; // SSPStrong
+  }
+
+  SanitizerMask getSupportedSanitizers() const override;
+
+protected:
+  Tool *buildAssembler() const override;
+  Tool *buildLinker() const override;
+};
+
 } // end namespace toolchains
 } // end namespace driver
 } // end namespace clang