Internalize strings in-place

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 1678b18c63dae2509113dc0e4995fbace32a8e23..9c0af61ec449a7ab7507e25eaaa90c415d0639ce 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -2712,11 +2712,13 @@ void MacroAssembler::JumpIfNotBothSequentialOneByteStrings(Register object1,
   const int kFlatOneByteStringTag =
       kStringTag | kOneByteStringTag | kSeqStringTag;
   // Interleave bits from both instance types and compare them in one check.
-  DCHECK_EQ(0, kFlatOneByteStringMask & (kFlatOneByteStringMask << 3));
+  const int kShift = 8;
+  DCHECK_EQ(0, kFlatOneByteStringMask & (kFlatOneByteStringMask << kShift));
   and_(scratch1, kFlatOneByteStringMask);
   and_(scratch2, kFlatOneByteStringMask);
-  lea(scratch1, Operand(scratch1, scratch2, times_8, 0));
-  cmp(scratch1, kFlatOneByteStringTag | (kFlatOneByteStringTag << 3));
+  shl(scratch2, kShift);
+  or_(scratch1, scratch2);
+  cmp(scratch1, kFlatOneByteStringTag | (kFlatOneByteStringTag << kShift));
   j(not_equal, failure);
 }