Revision: 7882
Author: [email protected]
Date: Fri May 13 01:21:35 2011
Log: Use type feedback for unary minus, improving the performance on
e.g. 3d-cube by
7.2% and math-cordic by 5.7%.
Review URL: http://codereview.chromium.org/7013025
http://code.google.com/p/v8/source/detail?r=7882
Modified:
/branches/bleeding_edge/src/hydrogen.cc
=======================================
--- /branches/bleeding_edge/src/hydrogen.cc Thu May 12 07:56:56 2011
+++ /branches/bleeding_edge/src/hydrogen.cc Fri May 13 01:21:35 2011
@@ -4633,6 +4633,10 @@
CHECK_ALIVE(VisitForValue(expr->expression()));
HValue* value = Pop();
HInstruction* instr = new(zone()) HMul(value,
graph_->GetConstantMinus1());
+ TypeInfo info = oracle()->UnaryType(expr);
+ Representation rep = ToRepresentation(info);
+ TraceRepresentation(expr->op(), info, instr, rep);
+ AssumeRepresentation(instr, rep);
ast_context()->ReturnInstruction(instr, expr->id());
}
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