Refactor PUSH/POP in ARM assemblers.

src/IceRegistersARM32.h

Index: src/IceRegistersARM32.h
diff --git a/src/IceRegistersARM32.h b/src/IceRegistersARM32.h
index d601e734b19e334ea40a571d756a8a3c3ce3cbdb..cc7603d4fd8e49b1737dde60a1622ba7ab385fde 100644
--- a/src/IceRegistersARM32.h
+++ b/src/IceRegistersARM32.h
@@ -88,6 +88,15 @@ public:
     return GPRRegister(RegNum - Reg_GPR_First);
   }
 
+  static inline SizeT getNumGPRegs() {
+    return Reg_GPR_Last + 1 - Reg_GPR_First;
+  }
+
+  static inline const char *getGPRegName(SizeT RegNum) {
+    assert(RegNum <= getNumGPRegs());
+    return RegNames[Reg_GPR_First + RegNum];
+  }
+
   static inline GPRRegister getI64PairFirstGPRNum(int32_t RegNum) {
     assert(Reg_I64PAIR_First <= RegNum);
     assert(RegNum <= Reg_I64PAIR_Last);
@@ -112,6 +121,11 @@ public:
     return Reg_SREG_Last + 1 - Reg_SREG_First;
   }
 
+  static inline const char *getSRegName(SizeT RegNum) {
+    assert(RegNum <= getNumSRegs());
+    return RegNames[Reg_SREG_First + RegNum];
+  }
+
   static inline SRegister getEncodedSReg(int32_t RegNum) {
     assert(Reg_SREG_First <= RegNum);
     assert(RegNum <= Reg_SREG_Last);