[Bug tree-optimization/50717] [4.7 Regression] Silent code gen fault with incorrect widening of multiply

[ams at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50717

--- Comment #7 from Andrew Stubbs <ams at gcc dot gnu.org> 2011-10-18 19:57:19 
UTC ---
Author: ams
Date: Tue Oct 18 19:57:15 2011
New Revision: 180164

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180164
Log:
2011-10-18  Andrew Stubbs  <a...@codesourcery.com>

    PR tree-optimization/50717

    gcc/
    * tree-ssa-math-opts.c (is_widening_mult_p): Remove the 'type'
    parameter.  Calculate 'type' from stmt.
    (convert_mult_to_widen): Update call the is_widening_mult_p.
    (convert_plusminus_to_widen): Likewise.

    gcc/testsuite/
    * gcc.dg/pr50717-1.c: New file.
    * gcc.target/arm/wmul-12.c: Correct types.
    * gcc.target/arm/wmul-8.c: Correct types.



Added:
    trunk/gcc/testsuite/gcc.dg/pr50717-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/arm/wmul-12.c
    trunk/gcc/testsuite/gcc.target/arm/wmul-8.c
    trunk/gcc/tree-ssa-math-opts.c