When configured with
Configured with: ../../mainline/configure --with-gmp=/pkgs/gmp-4.2.2/
--with-mpfr=/pkgs/gmp-4.2.2/ --prefix=/pkgs/gcc-mainline
--enable-gather-detailed-mem-stats
and run on the testcase of PR 26854 with
/pkgs/gcc-mainline/bin/gcc -Wall -W -Wno-unused -O1 -fno-math-errno
-fschedule-insns2 -fno-trapping-math -fno-strict-aliasing -fwrapv
-fomit-frame-pointer -fPIC -ftime-report -fmem-report -c all.i >>&
mainline-stats-2008-09-17-c
one line stands out:
tree SSA to normal : 485.81 (61%) usr 0.12 ( 0%) sys 486.01 (59%) wall
93945 kB (12%) ggc
TOTAL : 793.99 24.78 819.45
795105 kB
without checking, this is
tree SSA to normal : 13.31 ( 8%) usr 0.10 ( 1%) sys 13.42 ( 7%) wall
93945 kB (12%) ggc
TOTAL : 168.33 14.57 183.12
794201 kB
The timings of other parts of a checking-enabled compiler seem reasonable.
--
Summary: tree SSA to normal checking takes abnormally long time
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: lucier at math dot purdue dot edu
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37567
