[arm] Decrease the size of the assembler class by allocating buffers of pending constants on the he…

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 d0fcac206e0b7916995c3c9cf09482769273ea91..c54e51df78cb57c146f1f9f815214ca899057e49 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -1465,6 +1465,7 @@ class Assembler : public AssemblerBase {
   static const int kMaxDistToIntPool = 4*KB;
   static const int kMaxDistToFPPool = 1*KB;
   // All relocations could be integer, it therefore acts as the limit.
+  static const int kMinNumPendingConstants = 4;
   static const int kMaxNumPending32Constants = kMaxDistToIntPool / kInstrSize;
   static const int kMaxNumPending64Constants = kMaxDistToFPPool / kInstrSize;
 
@@ -1598,8 +1599,10 @@ class Assembler : public AssemblerBase {
   // pending relocation entry per instruction.
 
   // The buffers of pending constant pool entries.
-  ConstantPoolEntry pending_32_bit_constants_[kMaxNumPending32Constants];
-  ConstantPoolEntry pending_64_bit_constants_[kMaxNumPending64Constants];
+  ConstantPoolEntry pending_32_bit_constants_buffer_[kMinNumPendingConstants];
+  ConstantPoolEntry pending_64_bit_constants_buffer_[kMinNumPendingConstants];
+  ConstantPoolEntry* pending_32_bit_constants_;
+  ConstantPoolEntry* pending_64_bit_constants_;
   // Number of pending constant pool entries in the 32 bits buffer.
   int num_pending_32_bit_constants_;
   // Number of pending constant pool entries in the 64 bits buffer.