X87: Extends testb and cmpb/cmpw instruction support in the ia32 assembler.

src/regexp/x87/regexp-macro-assembler-x87.cc

Index: src/regexp/x87/regexp-macro-assembler-x87.cc
diff --git a/src/regexp/x87/regexp-macro-assembler-x87.cc b/src/regexp/x87/regexp-macro-assembler-x87.cc
index 3d18465ad7eb09c5487883391061566689df1a7e..9f15b1c952f7bf0af37333cc0202c2f1a145d35d 100644
--- a/src/regexp/x87/regexp-macro-assembler-x87.cc
+++ b/src/regexp/x87/regexp-macro-assembler-x87.cc
@@ -510,7 +510,8 @@ void RegExpMacroAssemblerX87::CheckBitInTable(
     __ and_(ebx, current_character());
     index = ebx;
   }
-  __ cmpb(FieldOperand(eax, index, times_1, ByteArray::kHeaderSize), 0);
+  __ cmpb(FieldOperand(eax, index, times_1, ByteArray::kHeaderSize),
+          Immediate(0));
   BranchOrBacktrack(not_equal, on_bit_set);
 }