Revision: 14997
Author: verwa...@chromium.org
Date: Fri Jun 7 02:11:33 2013
Log: Don't ignore the actual input representation in
UnaryMathOperations
R=jkumme...@chromium.org
Review URL: https://chromiumcodereview.appspot.com/16035014
http://code.google.com/p/v8/source/detail?r=14997
Modified:
/branches/bleeding_edge/src/hydrogen-instructions.cc
/branches/bleeding_edge/src/hydrogen-instructions.h
=======================================
--- /branches/bleeding_edge/src/hydrogen-instructions.cc Fri Jun 7
02:07:53 2013
+++ /branches/bleeding_edge/src/hydrogen-instructions.cc Fri Jun 7
02:11:33 2013
@@ -3090,6 +3090,16 @@
HType HUnaryMathOperation::CalculateInferredType() {
return HType::TaggedNumber();
}
+
+
+Representation HUnaryMathOperation::RepresentationFromInputs() {
+ Representation rep = representation();
+ // If any of the actual input representation is more general than what we
+ // have so far but not Tagged, use that representation instead.
+ Representation input_rep = value()->representation();
+ if (!input_rep.IsTagged()) rep = rep.generalize(input_rep);
+ return rep;
+}
HType HStringCharFromCode::CalculateInferredType() {
=======================================
--- /branches/bleeding_edge/src/hydrogen-instructions.h Fri Jun 7 02:07:53
2013
+++ /branches/bleeding_edge/src/hydrogen-instructions.h Fri Jun 7 02:11:33
2013
@@ -2651,6 +2651,7 @@
virtual Range* InferRange(Zone* zone);
virtual HValue* Canonicalize();
+ virtual Representation RepresentationFromInputs();
BuiltinFunctionId op() const { return op_; }
const char* OpName() const;
--
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