[ia32/x64] Smaller instruction to check NaN

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 7edd3076df69003f01375120619f83e90b26db24..4b6c9fd4bb02e4897f4d2099fc172edfb869900b 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -1170,7 +1170,9 @@ class Assembler : public AssemblerBase {
   // Check if there is less than kGap bytes available in the buffer.
   // If this is the case, we need to grow the buffer before emitting
   // an instruction or relocation information.
-  inline bool overflow() const { return pc_ >= reloc_info_writer.pos() - kGap; }
+  inline bool buffer_overflow() const {
+    return pc_ >= reloc_info_writer.pos() - kGap;
+  }
 
   // Get the number of bytes available in the buffer.
   inline int available_space() const { return reloc_info_writer.pos() - pc_; }
@@ -1266,7 +1268,7 @@ class Assembler : public AssemblerBase {
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) {
-    if (assembler_->overflow()) assembler_->GrowBuffer();
+    if (assembler_->buffer_overflow()) assembler_->GrowBuffer();
 #ifdef DEBUG
     space_before_ = assembler_->available_space();
 #endif