[Bug tree-optimization/46722] [4.6 Regression] Missed fma for x*x + y

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46722

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-30 
16:55:40 UTC ---
Author: rguenth
Date: Tue Nov 30 16:55:35 2010
New Revision: 167304

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167304
Log:
2010-11-30  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/46722
    * tree-ssa-math-opts.c (convert_mult_to_fma): Get multiplication
    operands as arguments.
    (execute_optimize_widening_mul): Also handle power of two as
    multiplication.

    * gcc.target/i386/fma4-fma-2.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.target/i386/fma4-fma-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-math-opts.c