From c85900f4d6aec17ef29140bfc97977463ac75cb2 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Wed, 30 Nov 2011 19:31:38 +0000
Subject: [PATCH] Get the -march argument based on the target MIPS architecture
 or cpu and pass it to GNU assembler. In addition, change function
 getMipsArchFromCPU() so that it can be reused in ConstructJob().

Patch by Simon Atanasyan.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145509 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Driver/Tools.cpp | 39 ++++++++++++++++++++++++++++++++-------
 1 file changed, 32 insertions(+), 7 deletions(-)

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index e17bcb79f2..ab8cf27aa6 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -706,16 +706,23 @@ static const char* getMipsArchFromCPU(StringRef CPUName) {
   return "mips64";
 }
 
+// Check that ArchName is a known Mips architecture name.
+static bool checkMipsArchName(StringRef ArchName) {
+  return ArchName == "mips" ||
+         ArchName == "mipsel" ||
+         ArchName == "mips64" ||
+         ArchName == "mips64el";
+}
+
 // Get default target cpu.
-static const char* getMipsCPUFromArch(StringRef ArchName, const Driver &D) {
+static const char* getMipsCPUFromArch(StringRef ArchName) {
   if (ArchName == "mips" || ArchName == "mipsel")
     return "mips32";
-  else if (ArchName == "mips64" || ArchName == "mips64el")
-    return "mips64";
-  else
-    D.Diag(diag::err_drv_invalid_arch_name) << ArchName;
 
-  return 0;
+  assert((ArchName == "mips64" || ArchName == "mips64el") &&
+         "Unexpected arch name.");
+
+  return "mips64";
 }
 
 // Get default ABI.
@@ -742,7 +749,10 @@ void Clang::AddMIPSTargetArgs(const ArgList &Args,
   }
   else {
     ArchName = Args.MakeArgString(getToolChain().getArchName());
-    CPUName = getMipsCPUFromArch(ArchName, D);
+    if (!checkMipsArchName(ArchName))
+      D.Diag(diag::err_drv_invalid_arch_name) << ArchName;
+    else
+      CPUName = getMipsCPUFromArch(ArchName);
   }
 
   CmdArgs.push_back("-target-cpu");
@@ -4282,6 +4292,21 @@ void linuxtools::Assemble::ConstructJob(Compilation &C, const JobAction &JA,
     StringRef MArch = getToolChain().getArchName();
     if (MArch == "armv7" || MArch == "armv7a" || MArch == "armv7-a")
       CmdArgs.push_back("-mfpu=neon");
+  } else if (getToolChain().getArch() == llvm::Triple::mips ||
+             getToolChain().getArch() == llvm::Triple::mipsel ||
+             getToolChain().getArch() == llvm::Triple::mips64 ||
+             getToolChain().getArch() == llvm::Triple::mips64el) {
+    // Get Mips CPU name and pass it to 'as'.
+    const char *CPUName;
+    if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
+      CPUName = A->getValue(Args);
+    else
+      CPUName = getMipsCPUFromArch(getToolChain().getArchName());
+
+    if (CPUName) {
+      CmdArgs.push_back("-march");
+      CmdArgs.push_back(CPUName);
+    }
   }
 
   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA,
-- 
2.40.0