Reviewers: Jakob,
Message:
PTAL
Description:
Infer smi-range for smi-typed values.
Please review this at https://chromiumcodereview.appspot.com/14192034/
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
4cd9f76b2b4d87a8540a7ce18f29cc0c073a4801..6496fa8eeb9d96bd3e9e0e0a7827ce41619377fa
100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1683,9 +1683,15 @@ void HInstanceOf::PrintDataTo(StringStream* stream) {
Range* HValue::InferRange(Zone* zone) {
- // Untagged integer32 cannot be -0, all other representations can.
- Range* result = new(zone) Range();
- result->set_can_be_minus_zero(!representation().IsInteger32());
+ Range* result;
+ if (type().IsSmi()) {
+ result = new(zone) Range(Smi::kMinValue, Smi::kMaxValue);
+ result->set_can_be_minus_zero(false);
+ } else {
+ // Untagged integer32 cannot be -0, all other representations can.
+ result = new(zone) Range();
+ result->set_can_be_minus_zero(!representation().IsInteger32());
+ }
return result;
}
--
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