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| author | Jakub Jelinek <jakub@redhat.com> | 2013-02-21 22:29:29 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-02-21 22:29:29 +0100 |
| commit | be63b77d8b202a77d7699311fa4a9aba4521b425 (patch) | |
| tree | d1030e594d863fd4319e656fd16f5fbba7cd2f74 /gcc/config.gcc | |
| parent | d7fde18c2a76c55f544a2f4afa6ac39c195f0392 (diff) | |
| download | gcc-be63b77d8b202a77d7699311fa4a9aba4521b425.zip gcc-be63b77d8b202a77d7699311fa4a9aba4521b425.tar.gz gcc-be63b77d8b202a77d7699311fa4a9aba4521b425.tar.bz2 | |
re PR middle-end/56420 (Arithmetic error in computation with compile time unsigned __int128 constant)
PR middle-end/56420
* expmed.c (EXACT_POWER_OF_2_OR_ZERO_P): Do subtraction in uhwi, to
avoid signed wrapping.
(expand_mult): Handle properly multiplication by
((dword_type) -1) << (BITS_PER_WORD - 1). Improve multiplication by
((dword_type) 1) << (BITS_PER_WORD - 1). Avoid undefined behavior
in the compiler if coeff is HOST_WIDE_INT_MIN.
(expand_divmod): Don't make ext_op1 static, change it's type to
uhwi. Avoid undefined behavior in -INTVAL (op1).
* gcc.dg/torture/pr56420.c: New test.
From-SVN: r196215
Diffstat (limited to 'gcc/config.gcc')
0 files changed, 0 insertions, 0 deletions