Bug 29885 - compiling takes very long time during -O3 compile
Summary: compiling takes very long time during -O3 compile
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: middle-end (show other bugs)
Version: 4.3.0
: P3 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
URL:
Keywords: compile-time-hog, memory-hog
Depends on:
Blocks:
 
Reported: 2006-11-18 10:59 UTC by marcus
Modified: 2009-02-22 14:14 UTC (History)
2 users (show)

See Also:
Host: x86_64-unknown-linux-gnu
Target: x86_64-unknown-linux-gnu
Build: x86_64-unknown-linux-gnu
Known to work:
Known to fail:
Last reconfirmed:

Attachments
locale.i (370 bytes, text/plain)
2006-11-18 10:59 UTC, marcus 		Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description marcus 2006-11-18 10:59:20 UTC 
Compiling the attached testcase (from WINE) with -O3 takes very long
time and memory (800MB) on current TRUNK (4.3).

removing one or more lines speeds up the compiler massively.

I think this is due to bitmask and ifs.
Comment 1 marcus 2006-11-18 10:59:51 UTC 
Created attachment 12640 [details]
locale.i

gcc -O3 -c locale.i
Comment 2 Andrew Pinski 2006-11-18 11:10:27 UTC 
This is ok with "4.3.0 20061112" on i686-linux-gnu.
Comment 3 Steven Bosscher 2009-02-22 14:14:27 UTC 
I can't reproduce this on i686-cygwin, i686-linux, and x86_64-linux with GCC 4.3.3 and with current trunk (r144372).