https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71544
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-06-15
CC| |hubicka at gcc dot gnu.org,
| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr71412?
Present from 4.8 up to trunk (7.0).
A workaround is to compile the test at -O1 with -finline-small-functions
(turned on by -O2 and above).
Note that compiling the test with all the documented optimization turned on by
-O1, e.g.,
-fauto-inc-dec -fbranch-count-reg -fcombine-stack-adjustments -fcompare-elim
-fcprop-registers -fdce -fdefer-pop -fdse -fforward-propagate
-fguess-branch-probability -fif-conversion2 -fif-conversion
-finline-functions-called-once -fipa-pure-const -fipa-profile -fipa-reference
-fmerge-constants -fmove-loop-invariants -freorder-blocks -fshrink-wrap
-fsplit-wide-types -fssa-backprop -fssa-phiopt -ftree-bit-ccp -ftree-ccp
-ftree-ch -ftree-coalesce-vars -ftree-copy-prop -ftree-dce
-ftree-dominator-opts -ftree-dse -ftree-forwprop -ftree-fre -ftree-phiprop
-ftree-sink -ftree-slsr -ftree-sra -ftree-pta -ftree-ter -funit-at-a-time
-fomit-frame-pointer -fstrict-aliasing
gives the expected result. So the problem occurs for either an undocumented
option or an optimization not controlled by an option.
