Reviewers: Jakob,
Message:
PTAL
Description:
Improve range analysis for smi phi
Please review this at https://chromiumcodereview.appspot.com/17498002/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/hydrogen-instructions.cc
Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index
f746af54bd75d988c082802b459699666630c6a0..e227cea08bc681a2116eeb38742c91a12215a9d2
100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1761,9 +1761,12 @@ Range* HConstant::InferRange(Zone* zone) {
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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