From 9f36062866e6e4bbbfd3efce85fcfb1ce62df97f Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanak@gmail.com>
Date: Mon, 26 Sep 2011 21:07:52 +0000
Subject: [PATCH] Make necessary changes in AddMIPSTargetArgs for targeting
 Mips64. Enable use of -mcpu.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140562 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Driver/Tools.cpp | 68 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 52 insertions(+), 16 deletions(-)

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index dba4c22d7d..8fafbee30d 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -752,33 +752,69 @@ void Clang::AddARMTargetArgs(const ArgList &Args,
   }
 }
 
+// Get default architecture.
+static const char* getMipsArchFromCPU(StringRef CPUName) {
+  if (CPUName == "mips32r1" || CPUName == "4ke")
+    return "mips";
+
+  assert((CPUName == "mips64r1" || CPUName == "mips64r2") &&
+         "Unexpected cpu name.");
+
+  return "mips64";
+}
+
+// Get default target cpu.
+static const char* getMipsCPUFromArch(StringRef ArchName, const Driver &D) {
+  if (ArchName == "mips" || ArchName == "mipsel")
+    return "mips32r1";
+  else if (ArchName == "mips64" || ArchName == "mips64el")
+    return "mips64r1";
+  else
+    D.Diag(diag::err_drv_invalid_arch_name) << ArchName;
+
+  return 0;
+}
+
+// Get default ABI.
+static const char* getMipsABIFromArch(StringRef ArchName) {
+    if (ArchName == "mips" || ArchName == "mipsel")
+      return "o32";
+    
+    assert((ArchName == "mips64" || ArchName == "mips64el") &&
+           "Unexpected arch name.");
+    return "n64";
+}
+
 void Clang::AddMIPSTargetArgs(const ArgList &Args,
                              ArgStringList &CmdArgs) const {
   const Driver &D = getToolChain().getDriver();
 
+  StringRef ArchName;
+  const char *CPUName;
+
+  // Set target cpu and architecture.
+  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
+    CPUName = A->getValue(Args);
+    ArchName = getMipsArchFromCPU(CPUName);
+  }
+  else {
+    ArchName = Args.MakeArgString(getToolChain().getArchName());
+    CPUName = getMipsCPUFromArch(ArchName, D);
+  }
+
+  CmdArgs.push_back("-target-cpu");
+  CmdArgs.push_back(CPUName);
+ 
   // Select the ABI to use.
   const char *ABIName = 0;
-  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
+  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
     ABIName = A->getValue(Args);
-  } else {
-    ABIName = "o32";
-  }
+  else 
+    ABIName = getMipsABIFromArch(ArchName);
 
   CmdArgs.push_back("-target-abi");
   CmdArgs.push_back(ABIName);
 
-  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
-    StringRef MArch = A->getValue(Args);
-    CmdArgs.push_back("-target-cpu");
-
-    if ((MArch == "r2000") || (MArch == "r3000"))
-      CmdArgs.push_back("mips1");
-    else if (MArch == "r6000")
-      CmdArgs.push_back("mips2");
-    else
-      CmdArgs.push_back(Args.MakeArgString(MArch));
-  }
-
   // Select the float ABI as determined by -msoft-float, -mhard-float, and
   StringRef FloatABI;
   if (Arg *A = Args.getLastArg(options::OPT_msoft_float,
-- 
2.40.0