[Bug ipa/62016] [4.8/4.9/4.10 Regression] very slow compilation at -O3 on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 --- Comment #6 from Jakub Jelinek --- In 4.9/trunk I think the compile time improved with r208831 , though I was testing tiny bit different testcase - if (p1 != 0) __builtin_abort (); instead of assert (p1 == 0);, nevertheless, r208830 took at -O3 still over 13 minutes before I've killed it, r208831 only 3 minutes and something.
[Bug ipa/62016] [4.8/4.9/4.10 Regression] very slow compilation at -O3 on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 Jakub Jelinek changed: What|Removed |Added CC||jakub at gcc dot gnu.org --- Comment #5 from Jakub Jelinek --- The regression in 4.8 started with r193161.
[Bug ipa/62016] [4.8/4.9/4.10 Regression] very slow compilation at -O3 on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 Jan Hubicka changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org --- Comment #4 from Jan Hubicka --- mine.
[Bug ipa/62016] [4.8/4.9/4.10 Regression] very slow compilation at -O3 on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 Markus Trippelsdorf changed: What|Removed |Added CC||trippels at gcc dot gnu.org --- Comment #3 from Markus Trippelsdorf --- estimate_calls_size_and_time is responsible: callgrind shows during compilation: PID 8134: /usr/libexec/gcc/x86_64-pc-linux-gnu/4.8.3/cc1 -quiet small.c -quiet -dumpbase small.c -mtune=generic -march=x86-64 -auxbase small -O3 -o /tmp/cc5Ji2sS.s sending command status internal to pid 8134 Totals: Ir Th 1 7,602,583,430 Frame: Ir Backtrace for Thread 1 [ 0] 198,528,310,004 estimate_calls_size_and_time(cgraph_node*, int*, int*, int*, unsigned int, vec, vec, vec) [clone .isra.48.371314.34966] (58874971 x) ... [34] 198,528,323,290 estimate_calls_size_and_time(cgraph_node*, int*, int*, int*, unsigned int, vec, vec, vec) [clone .isra.48.371314.34966] (58874971 x) [35]7,299,677,321 estimate_calls_size_and_time(cgraph_node*, int*, int*, int*, unsigned int, vec, vec, vec) [clone .isra.48.371314.34966] (68761 x) [36]7,276,594,294 estimate_calls_size_and_time(cgraph_node*, int*, int*, int*, unsigned int, vec, vec, vec) [clone .isra.48.371314.34966] (35608 x) [37]7,286,199,223 estimate_node_size_and_time(cgraph_node*, unsigned int, vec, vec, vec, int*, int*, int*, vec) [clone .371325] (35570 x) [38]7,382,517,284 do_estimate_edge_time(cgraph_edge*) (35570 x) [39]7,376,457,586 do_estimate_edge_size(cgraph_edge*) (30094 x) [40]7,375,282,471 estimate_edge_size(cgraph_edge*) [clone .371672.55874] (64499 x) [41]7,376,509,640 do_estimate_growth_1(cgraph_node*, void*) [clone .371011] (78 x) [42]7,376,511,655 cgraph_for_node_and_aliases(cgraph_node*, bool (*)(cgraph_node*, void*), void*, bool) (78 x) [43]7,376,515,292 do_estimate_growth(cgraph_node*) (78 x)
[Bug ipa/62016] [4.8/4.9/4.10 Regression] very slow compilation at -O3 on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 Richard Biener changed: What|Removed |Added CC||hubicka at gcc dot gnu.org, ||rguenth at gcc dot gnu.org --- Comment #2 from Richard Biener --- Would be nice to identify what improved 4.9 here and backport that to 4.8. And of course try to fix it for real for 4.10. ISTR the predicate stuff was a major hog.
[Bug ipa/62016] [4.8/4.9/4.10 Regression] very slow compilation at -O3 on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 Richard Biener changed: What|Removed |Added Keywords||compile-time-hog Status|UNCONFIRMED |NEW Last reconfirmed||2014-08-05 Target Milestone|--- |4.8.4 Summary|very slow compilation at|[4.8/4.9/4.10 Regression] |-O3 on x86_64-linux-gnu |very slow compilation at ||-O3 on x86_64-linux-gnu Ever confirmed|0 |1 --- Comment #1 from Richard Biener --- Confirmed. 4.8 is slowest (very very slow), 4.9 is a lot better but still 100x slower than 4.7. 4.7: TOTAL : 0.09 0.01 0.10 6621 kB 4.8: 4.9: ipa inlining heuristics : 2.99 (93%) usr 0.12 (92%) sys 3.11 (93%) wall 406507 kB (99%) ggc 4.10 (take with grain of salt - unoptimized and with checking): ipa inlining heuristics : 6.81 (90%) usr 0.15 (94%) sys 6.95 (90%) wall 426678 kB (99%) ggc
