[Bug middle-end/32279] Fold 1.0/sqrt(x/y) to sqrt(y/x)

[uros at gcc dot gnu dot org]

------- Comment #2 from uros at gcc dot gnu dot org  2007-06-11 09:09 -------
Subject: Bug 32279

Author: uros
Date: Mon Jun 11 09:09:24 2007
New Revision: 125614

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=125614
Log:
        PR middle-end/32279
        * fold-const (fold_binary) [RDIV_EXPR]: Optimize a/sqrt(b/c)
        into a*sqrt(c/b) if flag_unsafe_math_optimizations is set.

testsuite/ChangeLog:

        PR middle-end/32279
        * gcc.dg/builtins-11.c: Also check folding of a/sqrt(b/c).


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/builtins-11.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32279