[Bug tree-optimization/65170] [5 Regression] curve25519-donna-c64 miscompilation

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65170

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Feb 24 08:07:10 2015
New Revision: 220931

URL: https://gcc.gnu.org/viewcvs?rev=220931&root=gcc&view=rev
Log:
    PR tree-optimization/65170
    * wide-int.cc (wi::mul_internal): For the umul_ppmm optimization,
    if val[1] < 0, clear also val[2] and return 3.

    * gcc.c-torture/execute/pr65170.c: New test.
    * gcc.dg/tree-ssa/vrp96.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr65170.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp96.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/wide-int.cc
    trunk/libsanitizer/ChangeLog