[mips][p5600] Add -mcpu=p5600 option.

[dsanders]

Summary

Depends on D12193

[atanasyan]

LGTM

lib/Basic/Targets.cpp

return llvm::StringSwitch<bool>(Name)
         .Case("mips32r5", IsMips32)
         .Case("mips32r6", IsMips32)
         .Case("mips64", true)
         .Case("mips64r2", true)
         .Case("mips64r3", true)
         .Case("mips64r5", true)
         .Case("mips64r6", true)
         .Case("octeon", true)
+        .Case("p5600", true)
         .Default(false);
   }
   const std::string& getCPU() const { return CPU; }
   void initDefaultFeatures(llvm::StringMap<bool> &Features) const override {
     if (CPU == "octeon")
       Features["mips64r2"] = Features["cnmips"] = true;
     else
       Features[CPU] = true;

lib/Driver/ToolChains.cpp

static bool findMIPSMultilibs(const llvm::Triple &TargetTriple, StringRef Path,
   llvm::Triple::ArchType TargetArch = TargetTriple.getArch();
 
   Multilib::flags_list Flags;
   addMultilibFlag(isMips32(TargetArch), "m32", Flags);
   addMultilibFlag(isMips64(TargetArch), "m64", Flags);
   addMultilibFlag(isMips16(Args), "mips16", Flags);
   addMultilibFlag(CPUName == "mips32", "march=mips32", Flags);
   addMultilibFlag(CPUName == "mips32r2" || CPUName == "mips32r3" ||
-                      CPUName == "mips32r5",
+                      CPUName == "mips32r5" || CPUName == "p5600",
                   "march=mips32r2", Flags);
   addMultilibFlag(CPUName == "mips32r6", "march=mips32r6", Flags);
   addMultilibFlag(CPUName == "mips64", "march=mips64", Flags);
   addMultilibFlag(CPUName == "mips64r2" || CPUName == "mips64r3" ||
                       CPUName == "mips64r5" || CPUName == "octeon",
                   "march=mips64r2", Flags);
   addMultilibFlag(isMicroMips(Args), "mmicromips", Flags);
   addMultilibFlag(tools::mips::isUCLibc(Args), "muclibc", Flags);

test/Driver/mips-abi.c

 //
 // RUN: %clang -target mips-linux-gnu -### -c %s \
 // RUN:        -march=mips32r2 2>&1 \
 // RUN:   | FileCheck -check-prefix=MIPS-ARCH-32R2 %s
 // MIPS-ARCH-32R2: "-target-cpu" "mips32r2"
 // MIPS-ARCH-32R2: "-target-abi" "o32"
 //
 // RUN: %clang -target mips-linux-gnu -### -c %s \
+// RUN:        -march=p5600 2>&1 \
+// RUN:   | FileCheck -check-prefix=MIPS-ARCH-P5600 %s
+// MIPS-ARCH-P5600: "-target-cpu" "p5600"
+// MIPS-ARCH-P5600: "-target-abi" "o32"
+//
+// RUN: %clang -target mips-linux-gnu -### -c %s \
 // RUN:        -march=mips64 2>&1 \
 // RUN:   | FileCheck -check-prefix=MIPS-ARCH-3264 %s
 // MIPS-ARCH-3264: "-target-cpu" "mips64"
 // MIPS-ARCH-3264: "-target-abi" "o32"
 //
 // RUN: %clang -target mips64-linux-gnu -### -c %s \
 // RUN:        -march=mips64 2>&1 \
 // RUN:   | FileCheck -check-prefix=MIPS-ARCH-64 %s

test/Driver/mips-as.c

 // RUN:   | FileCheck -check-prefix=MIPS64R2-EL-AS %s
 // MIPS64R2-EL-AS: as{{(.exe)?}}" "-march" "mips64r2" "-mabi" "64" "-mno-shared" "-KPIC" "-EL"
 //
 // RUN: %clang -target mips-linux-gnu -march=mips32r2 -### \
 // RUN:   -no-integrated-as -c %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=MIPS-32R2 %s
 // MIPS-32R2: as{{(.exe)?}}" "-march" "mips32r2" "-mabi" "32" "-mno-shared" "-call_nonpic" "-EB"
 //
+// RUN: %clang -target mips-linux-gnu -march=p5600 -### \
+// RUN:   -no-integrated-as -c %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=MIPS-P5600 %s
+// MIPS-P5600: as{{(.exe)?}}" "-march" "p5600" "-mabi" "32" "-mno-shared" "-call_nonpic" "-EB"
+//
 // RUN: %clang -target mips64-linux-gnu -march=octeon -### \
 // RUN:   -no-integrated-as -c %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=MIPS-OCTEON %s
 // MIPS-OCTEON: as{{(.exe)?}}" "-march" "octeon" "-mabi" "64" "-mno-shared" "-KPIC" "-EB"
 //
 // RUN: %clang -target mips-linux-gnu -mips1 -### \
 // RUN:   -no-integrated-as -c %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=MIPS-ALIAS-1 %s