ARM optimize loading of immediates.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
diff --git a/src/arm/assembler-arm.h b/src/arm/assembler-arm.h
index f6b7a06aa2ca261edac503e8ebb8136292d971dd..48c7b767874d2ab2cbe2d9cb5bb5b46ac1aacc2a 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -387,6 +387,26 @@ enum LFlag {
 };
 
 
+// Opcode field of addrmode1 opcodes.
+enum AddrMode1Opcodes {
+  AND = 0 << 21,
+  EOR = 1 << 21,
+  SUB = 2 << 21,
+  RSB = 3 << 21,
+  ADD = 4 << 21,
+  ADC = 5 << 21,
+  SBC = 6 << 21,
+  RSC = 7 << 21,
+  TST = 8 << 21,
+  TEQ = 9 << 21,
+  CMP = 10 << 21,
+  CMN = 11 << 21,
+  ORR = 12 << 21,
+  MOV = 13 << 21,
+  BIC = 14 << 21,
+  MVN = 15 << 21
+};
+
 // -----------------------------------------------------------------------------
 // Machine instruction Operands
 
@@ -1017,6 +1037,9 @@ class Assembler : public Malloced {
   void addrmod4(Instr instr, Register rn, RegList rl);
   void addrmod5(Instr instr, CRegister crd, const MemOperand& x);
 
+  // Used by addrmod1 and a few other cases to load constants.
+  bool fit_to_shifter(Instr* instr, uint32_t imm32, bool addrmode1 = true);
+
   // Labels
   void print(Label* L);
   void bind_to(Label* L, int pos);