Index: src/ia32/lithium-ia32.cc |
=================================================================== |
--- src/ia32/lithium-ia32.cc (revision 8758) |
+++ src/ia32/lithium-ia32.cc (working copy) |
@@ -1042,9 +1042,15 @@ |
return new LGoto(successor->block_id()); |
} |
ToBooleanStub::Types expected = instr->expected_input_types(); |
+ // We need a temporary register when we have to access the map *or* we have |
+ // no type info yet, in which case we handle all cases (including the ones |
+ // involving maps). |
bool needs_temp = expected.NeedsMap() || expected.IsEmpty(); |
LOperand* temp = needs_temp ? TempRegister() : NULL; |
- return AssignEnvironment(new LBranch(UseRegister(v), temp)); |
+ LInstruction* branch = new LBranch(UseRegister(v), temp); |
+ // When we handle all cases, we never deopt, so we don't need to assign the |
+ // environment then. |
+ return expected.IsAll() ? branch : AssignEnvironment(branch); |
} |