Revision: 15070
Author: [email protected]
Date: Tue Jun 11 10:41:03 2013
Log: MIPS: Skip some conditional deopts for Div/Mul when all uses are
truncating.
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
[email protected]
Review URL: https://codereview.chromium.org/16645007
Patch from Balazs Kilvady <[email protected]>.
http://code.google.com/p/v8/source/detail?r=15070
Modified:
/branches/bleeding_edge/src/mips/lithium-codegen-mips.cc
=======================================
--- /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc Tue Jun 11
04:55:56 2013
+++ /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc Tue Jun 11
10:41:03 2013
@@ -1246,8 +1246,10 @@
__ 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);
}
--
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