[Bug rtl-optimization/55845] [4.8 Regression] 454.calculix miscompares with -march=btver2 -O3 -ffastmath -fschedule-insns -mvzeroupper for test data run

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55845



--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-08 
18:00:30 UTC ---

Author: jakub

Date: Tue Jan  8 18:00:10 2013

New Revision: 195028



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195028

Log:

    PR rtl-optimization/55845

    * df-problems.c (can_move_insns_across): Stop scanning at

    volatile_insn_p source instruction or give up if

    across_from .. across_to range contains any volatile_insn_p

    instructions.



    * gcc.target/i386/pr55845.c: New test.



Added:

    trunk/gcc/testsuite/gcc.target/i386/pr55845.c

Modified:

    trunk/gcc/ChangeLog

    trunk/gcc/df-problems.c

    trunk/gcc/testsuite/ChangeLog