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Improve dead phi elimination.
authorfschneider@chromium.org <fschneider@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Tue, 8 Mar 2011 10:04:23 +0000 (10:04 +0000)
committerfschneider@chromium.org <fschneider@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Tue, 8 Mar 2011 10:04:23 +0000 (10:04 +0000)
commit12ba2dd435e54ac4f5c2767a66940378fb1f2cf6
tree42cc25f3b2624384e6036e5576c9c7c2989883c1tree | snapshot
parent927f341d3c84d63ca6b40a402203e81d6161545acommit | diff
Improve dead phi elimination.

This change splits the existing phi elimination into two phases:
1. Remove redundant phis
2. Remove dead phis with a fixed point iteration.

The new approach allows us to remove dead phis that are connected
in a cycle.

Review URL: http://codereview.chromium.org/6624061

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7085 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
src/hydrogen-instructions.cc diff | blob | history
src/hydrogen-instructions.h diff | blob | history
src/hydrogen.cc diff | blob | history
src/hydrogen.h diff | blob | history
Domain: Web Framework / Web Engine;