Revision: 15247
Author: [email protected]
Date: Thu Jun 20 07:11:52 2013
Log: Improve range analysis for smi phi
[email protected]
Review URL: https://chromiumcodereview.appspot.com/17498002
http://code.google.com/p/v8/source/detail?r=15247
Modified:
/branches/bleeding_edge/src/hydrogen-instructions.cc
=======================================
--- /branches/bleeding_edge/src/hydrogen-instructions.cc Thu Jun 20
06:51:03 2013
+++ /branches/bleeding_edge/src/hydrogen-instructions.cc Thu Jun 20
07:11:52 2013
@@ -1761,9 +1761,12 @@
Range* HPhi::InferRange(Zone* zone) {
- if (representation().IsInteger32()) {
+ Representation r = representation();
+ if (r.IsSmiOrInteger32()) {
if (block()->IsLoopHeader()) {
- Range* range = new(zone) Range(kMinInt, kMaxInt);
+ Range* range = r.IsSmi()
+ ? new(zone) Range(Smi::kMinValue, Smi::kMaxValue)
+ : new(zone) Range(kMinInt, kMaxInt);
return range;
} else {
Range* range = OperandAt(0)->range()->Copy(zone);
--
--
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