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| author | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-01-28 15:43:03 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-01-28 15:43:03 +0100 |
| commit | 0bfbca5868fae1912db33ae4ab341d6e08bd68b4 (patch) | |
| tree | 2a2bfc3d290925073d4af913ae01b69cfbf1aa53 /gcc/tree-loop-distribution.c | |
| parent | dd8b9ddea2288c96124367bf66ce060eb1049872 (diff) | |
| download | gcc-0bfbca5868fae1912db33ae4ab341d6e08bd68b4.zip gcc-0bfbca5868fae1912db33ae4ab341d6e08bd68b4.tar.gz gcc-0bfbca5868fae1912db33ae4ab341d6e08bd68b4.tar.bz2 | |
re PR tree-optimization/56125 (-O2 -ffast-math generates bad code when dividing a double by the square of another double.)
PR tree-optimization/56125
* tree-ssa-math-opts.c (gimple_expand_builtin_pow): Don't optimize
pow(x,c) into sqrt(x) * powi(x, n/2) or
1.0 / (sqrt(x) * powi(x, abs(n/2))) if c is an integer or when
optimizing for size.
Don't optimize pow(x,c) into powi(x, n/3) * powi(cbrt(x), n%3) or
1.0 / (powi(x, abs(n)/3) * powi(cbrt(x), abs(n)%3)) if 2c is an
integer.
* gcc.dg/pr56125.c: New test.
From-SVN: r195507
Diffstat (limited to 'gcc/tree-loop-distribution.c')
0 files changed, 0 insertions, 0 deletions