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

src/arm64/assembler-arm64-inl.h

Index: src/arm64/assembler-arm64-inl.h
diff --git a/src/arm64/assembler-arm64-inl.h b/src/arm64/assembler-arm64-inl.h
index d11e71c87f0127e48715b1441e5bd8d57d7c9a5d..5cc1095f9ed8629b28d52c66e3d2c85a155fe4af 100644
--- a/src/arm64/assembler-arm64-inl.h
+++ b/src/arm64/assembler-arm64-inl.h
@@ -310,7 +310,6 @@ Immediate::Immediate(T t, RelocInfo::Mode rmode)
   STATIC_ASSERT(ImmediateInitializer<T>::kIsIntType);
 }
 
-
 // Operand.
 template<typename T>
 Operand::Operand(Handle<T> value) : immediate_(value), reg_(NoReg) {}
@@ -325,7 +324,6 @@ Operand::Operand(T t, RelocInfo::Mode rmode)
     : immediate_(t, rmode),
       reg_(NoReg) {}
 
-
 Operand::Operand(Register reg, Shift shift, unsigned shift_amount)
     : immediate_(0),
       reg_(reg),
@@ -354,7 +352,7 @@ Operand::Operand(Register reg, Extend extend, unsigned shift_amount)
 
 
 bool Operand::IsImmediate() const {
-  return reg_.Is(NoReg);
+  return reg_.Is(NoReg) && !is_heap_number();
 }