Fix implementation of compare-minus-zero-and-branch on ia32 and x64.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 5e2367f986567bcc8ea4c580d2e14f7fc720bf9e..4f79aaa7377e8ab731a2e9a3c60b9b667be45b3e 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -2250,7 +2250,7 @@ void LCodeGen::DoCompareMinusZeroAndBranch(LCompareMinusZeroAndBranch* instr) {
   Representation rep = instr->hydrogen()->value()->representation();
   ASSERT(!rep.IsInteger32());
   Label if_false;
-
+  __ int3();

[Jakob Kummerow, 2013/11/12 15:10:02]

Might wanna remove this before landing.

   if (rep.IsDouble()) {
     XMMRegister value = ToDoubleRegister(instr->value());
     XMMRegister xmm_scratch = double_scratch0();
@@ -2263,7 +2263,7 @@ void LCodeGen::DoCompareMinusZeroAndBranch(LCompareMinusZeroAndBranch* instr) {
   } else {
     Register value = ToRegister(instr->value());
     Handle<Map> map = masm()->isolate()->factory()->heap_number_map();
-    __ CheckMap(rax, map, &if_false, DO_SMI_CHECK);
+    __ CheckMap(value, map, &if_false, DO_SMI_CHECK);
     __ cmpl(FieldOperand(value, HeapNumber::kExponentOffset),
             Immediate(0x80000000));
     __ j(not_equal, &if_false);