Experimental: thread live register references to deferred code....

src/macro-assembler-ia32.cc

Index: src/macro-assembler-ia32.cc
===================================================================
--- src/macro-assembler-ia32.cc	(revision 969)
+++ src/macro-assembler-ia32.cc	(working copy)
@@ -603,22 +603,12 @@
 }
 
 
-void MacroAssembler::NegativeZeroTest(CodeGenerator* cgen,
-                                      Register result,
-                                      Register op,
-                                      JumpTarget* then_target) {
-  JumpTarget ok(cgen);
-  test(result, Operand(result));
-  ok.Branch(not_zero, taken);
-  test(op, Operand(op));
-  then_target->Branch(sign, not_taken);
-  ok.Bind();
-}
-
-
 void MacroAssembler::NegativeZeroTest(Register result,
                                       Register op,
                                       Label* then_label) {
+  // Because this function is called from the code generator (with its own
+  // register allocator), it should not use registers other than result and
+  // op, and should not push or pop from the stack.
   Label ok;
   test(result, Operand(result));
   j(not_zero, &ok, taken);