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| author | Jakub Jelinek <jakub@redhat.com> | 2016-09-16 09:09:27 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2016-09-16 09:09:27 +0200 |
| commit | 7d704548e7aabca540cc173f70df1e0dcfc6304c (patch) | |
| tree | 13801b02aa4d59b734c19f7511e572c11dd58192 /gcc/internal-fn.c | |
| parent | ff18118fba30ff4befcf94eba9b239a4fe6f3a6c (diff) | |
| download | gcc-7d704548e7aabca540cc173f70df1e0dcfc6304c.zip gcc-7d704548e7aabca540cc173f70df1e0dcfc6304c.tar.gz gcc-7d704548e7aabca540cc173f70df1e0dcfc6304c.tar.bz2 | |
re PR middle-end/77594 (double computation for __builtin_sub_overflow (0, ...))
PR middle-end/77594
* internal-fn.c (expand_arith_overflow) <case MINUS_EXPR>: Don't fall
through into expand_addsub_overflow after expand_neg_overflow.
* gcc.target/i386/pr77594.c: New test.
Co-Authored-By: Eric Botcazou <ebotcazou@adacore.com>
From-SVN: r240173
Diffstat (limited to 'gcc/internal-fn.c')
| -rw-r--r-- | gcc/internal-fn.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c index cd4b625..c269ca6 100644 --- a/gcc/internal-fn.c +++ b/gcc/internal-fn.c @@ -1833,7 +1833,10 @@ expand_arith_overflow (enum tree_code code, gimple *stmt) { case MINUS_EXPR: if (integer_zerop (arg0) && !unsr_p) - expand_neg_overflow (loc, lhs, arg1, false); + { + expand_neg_overflow (loc, lhs, arg1, false); + return; + } /* FALLTHRU */ case PLUS_EXPR: expand_addsub_overflow (loc, code, lhs, arg0, arg1, |