[Bug tree-optimization/23452] Optimizing CONJG_EXPR (a) * a

[sayle at gcc dot gnu dot org]

------- Comment #2 from sayle at gcc dot gnu dot org  2006-05-30 21:34 -------
Subject: Bug 23452

Author: sayle
Date: Tue May 30 21:34:04 2006
New Revision: 114246

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114246
Log:

        PR tree-optimization/23452
        * fold-const.c (fold_mult_zconjz): New subroutine of fold_binary,
        to optimize z * conj(z) as realpart(z)^2 + imagpart(z)^2.
        (fold_binary) <MULT_EXPR>: Call fold_mult_zconjz for integral
        complex values and with -ffast-math for FP complex values.

        * gcc.dg/fold-mulconj-1.c: New test case.


Added:
    trunk/gcc/testsuite/gcc.dg/fold-mulconj-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23452