Revision: 16129
Author: [email protected]
Date: Fri Aug 9 05:03:40 2013
Log: Replace MathFloor/Round by HChange if the input representation
does not match the output representation
[email protected]
Review URL: https://chromiumcodereview.appspot.com/22398009
http://code.google.com/p/v8/source/detail?r=16129
Modified:
/branches/bleeding_edge/src/hydrogen-instructions.cc
=======================================
--- /branches/bleeding_edge/src/hydrogen-instructions.cc Fri Aug 9
04:21:03 2013
+++ /branches/bleeding_edge/src/hydrogen-instructions.cc Fri Aug 9
05:03:40 2013
@@ -1291,7 +1291,15 @@
// If the input is integer32 then we replace the round instruction
// with its input.
- if (val->representation().IsSmiOrInteger32()) return val;
+ if (val->representation().IsSmiOrInteger32()) {
+ if (!val->representation().Equals(representation())) {
+ HChange* result = new(block()->zone()) HChange(
+ val, representation(), false, false, false);
+ result->InsertBefore(this);
+ return result;
+ }
+ return val;
+ }
}
if (op() == kMathFloor) {
@@ -1300,7 +1308,15 @@
// If the input is integer32 then we replace the floor instruction
// with its input.
- if (val->representation().IsSmiOrInteger32()) return val;
+ if (val->representation().IsSmiOrInteger32()) {
+ if (!val->representation().Equals(representation())) {
+ HChange* result = new(block()->zone()) HChange(
+ val, representation(), false, false, false);
+ result->InsertBefore(this);
+ return result;
+ }
+ return val;
+ }
if (val->IsDiv() && (val->UseCount() == 1)) {
HDiv* hdiv = HDiv::cast(val);
--
--
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