Port r15060 (8cdd204)
Original commit message:
- set "can be minus zero" flag properly so minus-zero checks are skipped
- skip "integer result?" check in division code when uses are truncating
- drive-by cleanup: consolidated computation of kCanOverflow flag for Add/Sub into range inference phase
BUG=v8:2132
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/
16645007
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15070
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
__ bind(&left_not_min_int);
}
- __ mfhi(result);
- DeoptimizeIf(ne, instr->environment(), result, Operand(zero_reg));
+ if (!instr->hydrogen()->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
+ __ mfhi(result);
+ DeoptimizeIf(ne, instr->environment(), result, Operand(zero_reg));
+ }
__ mflo(result);
}