Timeline

Exact progress of the project is described in ChangeLog, ChangeLog.6 and ChangeLog.cfg files in the GCC subdirectory, but here we point out some dates we consider especially important for our project.

Jul 28

First prototype of new branch predictor and profiler integrated to GCC + modification of register allocator. (Jan Hubicka)

Sep 10

First version of cfgcleanup integrated. (Jan Hubicka)

Sep 25

Large reorganization of CFG related modules. flow.c breakup (Jan Hubicka)

Nov 12

CFG efforts moved from mainline to cfg-branch due to destabilization.

Nov 12

Natural loop discovery code finally works. (Josef Zlomek)

Nov 12

Cross-jumping and jump threading merged to mainline. (Jan Hubicka)

Nov 13

Old jump optimization pass is finally dead. (Jan Hubicka)

Nov 15

High level branch prediction integrated. (Zdenek Dvorák)

Nov 17

CFG layout duplication code and preliminary tracer implementation. (Jan Hubicka)

Nov 26

Double test combining pass. (Jan Hubicka)

Dec 11

First version of software trace cache implementation. (Josef Zlomek)

Dec 12

Tracer now produces better code.

Dec 13

Major of our changes are now in the mainline tree. Thanks to Richard Henderson.

Dec 15

GCC mainline feature freeze.

Jan 1

New profiler file format. (Pavel Nejedlý)

Jan 2

Thread safe profiling integrated. (Zdenek Dvorák)

Jan 9

Software trace cache now produces better code (new loop rotation code). (Josef Zlomek)

Jan 16

Code hoisting infrastructure and GCSE revamp. (Jan Hubicka)

Jan 21

Midlevel RTL prototype. (Jan Hubicka)

Jan 23

Variable tracking code. (Jan Hubicka)

Jan 24

New natural loop code. (Zdenek Dvorák)

Feb 13

Finished integration of most of cleanups, fixes and infrastructural updates to the mainline. Thanks to Richard Henderson.

Feb 15

Final mainline freeze.

Feb 19

Major cfglayout cleanups and fixes. (Jan Hubicka)

Feb 21

Loop code updates integrated. (Zdenek Dvorák)

Feb 25

Loop unswitching code. (Zdenek Dvorák)

Mar 18

Loop unrolling and peeling code. (Zdenek Dvorák)

Mar 25

New debug output code. (Daniel Berlin, Josef Zlomek)

Apr 1

Feature freeze.

Apr 3

PowerPC and Sparc bootstrapped.

Apr 9

Fast dominance tree updating code integrated. (Pavel Nejedlý)