[mips] In the integrated assembler, select the default feature bits b…

…y changing the CPU value.

    
This is consistent with the way CodeGen acheives this. However, CodeGen
always selects mips32 (even when the architecture is mips64).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201694 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp

@@ -39,27 +39,6 @@
 
 using namespace llvm;
 
-static std::string ParseMipsTriple(StringRef TT, StringRef CPU) {
-  std::string MipsArchFeature;
-  Triple TheTriple(TT);
-
-  if (TheTriple.getArch() == Triple::mips ||
-      TheTriple.getArch() == Triple::mipsel) {
-    if (CPU.empty() || CPU == "mips32") {
-      MipsArchFeature = "+mips32";
-    } else if (CPU == "mips32r2") {
-      MipsArchFeature = "+mips32r2";
-    }
-  } else {
-      if (CPU.empty() || CPU == "mips64") {
-        MipsArchFeature = "+mips64";
-      } else if (CPU == "mips64r2") {
-        MipsArchFeature = "+mips64r2";
-      }
-  }
-  return MipsArchFeature;
-}
-
 static MCInstrInfo *createMipsMCInstrInfo() {
   MCInstrInfo *X = new MCInstrInfo();
   InitMipsMCInstrInfo(X);
@@ -74,15 +53,17 @@ static MCRegisterInfo *createMipsMCRegisterInfo(StringRef TT) {
 
 static MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
                                                   StringRef FS) {
-  std::string ArchFS = ParseMipsTriple(TT,CPU);
-  if (!FS.empty()) {
-    if (!ArchFS.empty())
-      ArchFS = ArchFS + "," + FS.str();
+  if (CPU.empty()) {
+    Triple TheTriple(TT);
+    // FIXME: CodeGen picks mips32 in both cases.
+    if (TheTriple.getArch() == Triple::mips ||
+        TheTriple.getArch() == Triple::mipsel)
+      CPU = "mips32";
     else
-      ArchFS = FS;
+      CPU = "mips64";
   }
   MCSubtargetInfo *X = new MCSubtargetInfo();
-  InitMipsMCSubtargetInfo(X, TT, CPU, ArchFS);
+  InitMipsMCSubtargetInfo(X, TT, CPU, FS);
   return X;
 }