Bug 68186

Summary:

All of the functionality in the non-speculative JIT should be available to the speculative JIT via helper methods

Product:

WebKit

Reporter:

Filip Pizlo <fpizlo>

Component:

JavaScriptCore

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

barraclough, fpizlo, ggaren

Priority:

Version:

528+ (Nightly build)

Hardware:

All

OS:

All

Bug Depends on:

Bug Blocks:

68177

Attachments:

Description	Flags
the patch	oliver: review+

Description Filip Pizlo 2011-09-15 13:27:11 PDT

In some cases the speculative JIT may have evidence that speculating on the type of a particular variable is unprofitable.  In those cases it's likely to make sense to emit what the non-speculative JIT would have emitted, but only for uses of that variable.  Doing this requires having the non-speculative JIT's code generator available on a per-opcode basis in the form of helper methods in JITCodeGenerator.

Comment 1 Filip Pizlo 2011-09-15 13:34:22 PDT

Created attachment 107542 [details]
the patch

Comment 2 Filip Pizlo 2011-09-15 14:50:21 PDT

Landed in r95230.