https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111241
Bug ID: 111241
Summary: Extraordinary amount of time spent in "callgraph
functions expansion"
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Created attachment 55818
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55818&action=edit
gzipped C source code
foundBugs $ time ~/gcc/results/bin/gcc -c -w -O1 -fno-var-tracking bug951.c
real 0m52.441s
user 0m51.038s
sys 0m0.498s
foundBugs $ (ulimit -t 300; time ~/gcc/results/bin/gcc -c -w -O2
-fno-var-tracking bug951.c)
real 2m18.781s
user 2m15.957s
sys 0m1.205s
foundBugs $
>From -ftime-report on the second compile:
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.01 ( 0%) 0.00 ( 0%)
1832k ( 0%)
phase parsing : 1.78 ( 1%) 2.83 ( 56%) 4.66 ( 3%)
55M ( 12%)
phase opt and generate : 136.07 ( 99%) 2.18 ( 43%) 139.81 ( 97%)
411M ( 88%)
garbage collection : 0.95 ( 1%) 0.02 ( 0%) 0.91 ( 1%)
0 ( 0%)
callgraph construction : 0.16 ( 0%) 0.02 ( 0%) 0.16 ( 0%)
11M ( 2%)
callgraph optimization : 0.15 ( 0%) 0.05 ( 1%) 0.22 ( 0%)
3272 ( 0%)
callgraph functions expansion : 106.59 ( 77%) 1.39 ( 28%) 109.22 ( 76%)
299M ( 64%)
callgraph ipa passes : 28.82 ( 21%) 0.74 ( 15%) 29.88 ( 21%)
84M ( 18%)
