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| author | Richard Biener <rguenther@suse.de> | 2022-04-25 10:55:21 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-04-25 11:46:59 +0200 |
| commit | f0e170f72f8bfaa2a64e1d09ebdfd48f917420f1 (patch) | |
| tree | 259fc7afcfe8b3f9535c4ea8ef140185cb1aedac /gcc | |
| parent | ab91c10792cd3a1ba1495aa30a34ca17b043bafb (diff) | |
| download | gcc-f0e170f72f8bfaa2a64e1d09ebdfd48f917420f1.zip gcc-f0e170f72f8bfaa2a64e1d09ebdfd48f917420f1.tar.gz gcc-f0e170f72f8bfaa2a64e1d09ebdfd48f917420f1.tar.bz2 | |
tree-optimization/105368 - avoid overflow in powi_cost
The following avoids undefined signed overflow when computing
the absolute of the exponent in powi_cost.
2022-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/105368
* tree-ssa-math-opts.cc (powi_cost): Use absu_hwi.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/tree-ssa-math-opts.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/tree-ssa-math-opts.cc b/gcc/tree-ssa-math-opts.cc index 102b7a2..7555793 100644 --- a/gcc/tree-ssa-math-opts.cc +++ b/gcc/tree-ssa-math-opts.cc @@ -1462,7 +1462,7 @@ powi_cost (HOST_WIDE_INT n) return 0; /* Ignore the reciprocal when calculating the cost. */ - val = (n < 0) ? -n : n; + val = absu_hwi (n); /* Initialize the exponent cache. */ memset (cache, 0, POWI_TABLE_SIZE * sizeof (bool)); |