[Driver][NFC] Make use of auto (llvm#70400)

Author: brad0

clang/lib/Driver/ToolChains/FreeBSD.cpp

@@ -129,8 +129,7 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                    const InputInfoList &Inputs,
                                    const ArgList &Args,
                                    const char *LinkingOutput) const {
-  const toolchains::FreeBSD &ToolChain =
-      static_cast<const toolchains::FreeBSD &>(getToolChain());
+  const auto &ToolChain = static_cast<const FreeBSD &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool IsPIE =

clang/lib/Driver/ToolChains/Fuchsia.cpp

@@ -34,8 +34,7 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                    const InputInfoList &Inputs,
                                    const ArgList &Args,
                                    const char *LinkingOutput) const {
-  const toolchains::Fuchsia &ToolChain =
-      static_cast<const toolchains::Fuchsia &>(getToolChain());
+  const auto &ToolChain = static_cast<const Fuchsia &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
 
   const llvm::Triple &Triple = ToolChain.getEffectiveTriple();

clang/lib/Driver/ToolChains/Gnu.cpp

@@ -376,8 +376,7 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   // Generic_ELF, so the static_cast might return a reference to a invalid
   // instance (see PR45061). Ideally, the Linker constructor needs to take a
   // Generic_ELF instead.
-  const toolchains::Generic_ELF &ToolChain =
-      static_cast<const toolchains::Generic_ELF &>(getToolChain());
+  const auto &ToolChain = static_cast<const Generic_ELF &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
 
   const llvm::Triple &Triple = getToolChain().getEffectiveTriple();

clang/lib/Driver/ToolChains/Haiku.cpp

@@ -23,8 +23,7 @@ void haiku::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                    const InputInfoList &Inputs,
                                    const ArgList &Args,
                                    const char *LinkingOutput) const {
-  const toolchains::Haiku &ToolChain =
-      static_cast<const toolchains::Haiku &>(getToolChain());
+  const auto &ToolChain = static_cast<const Haiku &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool Static = Args.hasArg(options::OPT_static);

clang/lib/Driver/ToolChains/NaCl.cpp

@@ -31,8 +31,7 @@ void nacltools::AssemblerARM::ConstructJob(Compilation &C, const JobAction &JA,
                                            const InputInfoList &Inputs,
                                            const ArgList &Args,
                                            const char *LinkingOutput) const {
-  const toolchains::NaClToolChain &ToolChain =
-      static_cast<const toolchains::NaClToolChain &>(getToolChain());
+  const auto &ToolChain = static_cast<const NaClToolChain &>(getToolChain());
   InputInfo NaClMacros(types::TY_PP_Asm, ToolChain.GetNaClArmMacrosPath(),
                        "nacl-arm-macros.s");
   InputInfoList NewInputs;
@@ -52,8 +51,7 @@ void nacltools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                      const ArgList &Args,
                                      const char *LinkingOutput) const {
 
-  const toolchains::NaClToolChain &ToolChain =
-      static_cast<const toolchains::NaClToolChain &>(getToolChain());
+  const auto &ToolChain = static_cast<const NaClToolChain &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool IsStatic =

clang/lib/Driver/ToolChains/OpenBSD.cpp

@@ -30,8 +30,7 @@ void openbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
                                       const InputInfoList &Inputs,
                                       const ArgList &Args,
                                       const char *LinkingOutput) const {
-  const toolchains::OpenBSD &ToolChain =
-      static_cast<const toolchains::OpenBSD &>(getToolChain());
+  const auto &ToolChain = static_cast<const OpenBSD &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
   const llvm::Triple &Triple = ToolChain.getTriple();
 
@@ -110,8 +109,7 @@ void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                    const InputInfoList &Inputs,
                                    const ArgList &Args,
                                    const char *LinkingOutput) const {
-  const toolchains::OpenBSD &ToolChain =
-      static_cast<const toolchains::OpenBSD &>(getToolChain());
+  const auto &ToolChain = static_cast<const OpenBSD &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   ArgStringList CmdArgs;

clang/lib/Driver/ToolChains/Solaris.cpp

@@ -126,8 +126,7 @@ void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 
   if (LinkerIsGnuLd) {
     // Set the correct linker emulation for 32- and 64-bit Solaris.
-    const toolchains::Solaris &ToolChain =
-        static_cast<const toolchains::Solaris &>(getToolChain());
+    const auto &ToolChain = static_cast<const Solaris &>(getToolChain());
     const llvm::Triple::ArchType Arch = ToolChain.getArch();
 
     switch (Arch) {