Index: llvm/trunk/lib/Target/ARM/ARM.td
===================================================================
--- llvm/trunk/lib/Target/ARM/ARM.td
+++ llvm/trunk/lib/Target/ARM/ARM.td
@@ -278,6 +278,8 @@
 def ProcR7      : SubtargetFeature<"r7", "ARMProcFamily", "CortexR7",
                                    "Cortex-R7 ARM processors", []>;
 
+def ProcM3      : SubtargetFeature<"m3", "ARMProcFamily", "CortexM3",
+                                   "Cortex-M3 ARM processors", []>;
 
 //===----------------------------------------------------------------------===//
 // ARM schedules.
@@ -641,8 +643,8 @@
                                                          FeatureAvoidPartialCPSR,
                                                          FeatureT2XtPk]>;
 
-def : ProcNoItin<"cortex-m3",                           [ARMv7m]>;
-def : ProcNoItin<"sc300",                               [ARMv7m]>;
+def : ProcNoItin<"cortex-m3",                           [ARMv7m, ProcM3]>;
+def : ProcNoItin<"sc300",                               [ARMv7m, ProcM3]>;
 
 def : ProcNoItin<"cortex-m4",                           [ARMv7em,
                                                          FeatureVFP4,
Index: llvm/trunk/lib/Target/ARM/ARMSubtarget.h
===================================================================
--- llvm/trunk/lib/Target/ARM/ARMSubtarget.h
+++ llvm/trunk/lib/Target/ARM/ARMSubtarget.h
@@ -43,8 +43,9 @@
 protected:
   enum ARMProcFamilyEnum {
     Others, CortexA5, CortexA7, CortexA8, CortexA9, CortexA12, CortexA15,
-    CortexA17, CortexR4, CortexR4F, CortexR5, CortexR7, CortexA32, CortexA35,
-    CortexA53, CortexA57, CortexA72, Krait, Swift, ExynosM1
+    CortexA17, CortexR4, CortexR4F, CortexR5, CortexR7, CortexM3,
+    CortexA32, CortexA35, CortexA53, CortexA57, CortexA72,
+    Krait, Swift, ExynosM1
   };
   enum ARMProcClassEnum {
     None, AClass, RClass, MClass
@@ -334,7 +335,7 @@
   bool isCortexA9() const { return ARMProcFamily == CortexA9; }
   bool isCortexA15() const { return ARMProcFamily == CortexA15; }
   bool isSwift()    const { return ARMProcFamily == Swift; }
-  bool isCortexM3() const { return CPUString == "cortex-m3"; }
+  bool isCortexM3() const { return ARMProcFamily == CortexM3; }
   bool isLikeA9() const { return isCortexA9() || isCortexA15() || isKrait(); }
   bool isCortexR5() const { return ARMProcFamily == CortexR5; }
   bool isKrait() const { return ARMProcFamily == Krait; }