[compiler] Delay allocation of code-embedded heap numbers.

src/arm/assembler-arm-inl.h

Index: src/arm/assembler-arm-inl.h
diff --git a/src/arm/assembler-arm-inl.h b/src/arm/assembler-arm-inl.h
index b2ab940bd2c01a6e5f4d6384e4261c83439be3df..52218cc8ce92b0ee811012d87595652d681ade73 100644
--- a/src/arm/assembler-arm-inl.h
+++ b/src/arm/assembler-arm-inl.h
@@ -280,7 +280,7 @@ void RelocInfo::Visit(Heap* heap) {
 
 Operand::Operand(int32_t immediate, RelocInfo::Mode rmode)  {
   rm_ = no_reg;
-  imm32_ = immediate;
+  value_.immediate = immediate;
   rmode_ = rmode;
 }
 
@@ -288,14 +288,14 @@ Operand Operand::Zero() { return Operand(static_cast<int32_t>(0)); }
 
 Operand::Operand(const ExternalReference& f)  {
   rm_ = no_reg;
-  imm32_ = reinterpret_cast<int32_t>(f.address());
+  value_.immediate = reinterpret_cast<int32_t>(f.address());
   rmode_ = RelocInfo::EXTERNAL_REFERENCE;
 }
 
 
 Operand::Operand(Smi* value) {
   rm_ = no_reg;
-  imm32_ =  reinterpret_cast<intptr_t>(value);
+  value_.immediate = reinterpret_cast<intptr_t>(value);
   rmode_ = RelocInfo::NONE32;
 }