[Bug rtl-optimization/49472] [4.7 regression] Compiler segfault on valid code

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49472

--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-07-04 
18:53:58 UTC ---
Author: jakub
Date: Mon Jul  4 18:53:56 2011
New Revision: 175821

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=175821
Log:
    PR rtl-optimization/49472
    * simplify-rtx.c (simplify_unary_operation_1) <case NEG>: When
    negating MULT, negate the second operand instead of first.
    (simplify_binary_operation_1) <case MULT>: If one operand is
    a NEG and the other is MULT, don't attempt to optimize by
    negation of the MULT operand if it only moves the NEG operation
    around.

    * gfortran.dg/pr49472.f90: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr49472.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/simplify-rtx.c
    trunk/gcc/testsuite/ChangeLog