Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -6263,6 +6263,7 @@
         .Case("mips64r5", true)
         .Case("mips64r6", true)
         .Case("octeon", true)
+        .Case("p5600", true)
         .Default(false);
   }
   const std::string& getCPU() const { return CPU; }
Index: lib/Driver/ToolChains.cpp
===================================================================
--- lib/Driver/ToolChains.cpp
+++ lib/Driver/ToolChains.cpp
@@ -1754,7 +1754,7 @@
   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);
Index: test/Driver/mips-abi.c
===================================================================
--- test/Driver/mips-abi.c
+++ test/Driver/mips-abi.c
@@ -99,6 +99,12 @@
 // 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"
Index: test/Driver/mips-as.c
===================================================================
--- test/Driver/mips-as.c
+++ test/Driver/mips-as.c
@@ -58,6 +58,11 @@
 // 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