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| author | Aldy Hernandez <aldyh@redhat.com> | 2017-01-31 10:30:47 +0000 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@gcc.gnu.org> | 2017-01-31 10:30:47 +0000 |
| commit | 8b670f93ab11361ae88a22fea4f96c770afb6311 (patch) | |
| tree | 36ec292abbd9b98c6a30917ff5375daaefcbd37e /gcc/bitmap.h | |
| parent | 4727e06bb7c047a10aa502c829b7e4b519d8082b (diff) | |
| download | gcc-8b670f93ab11361ae88a22fea4f96c770afb6311.zip gcc-8b670f93ab11361ae88a22fea4f96c770afb6311.tar.gz gcc-8b670f93ab11361ae88a22fea4f96c770afb6311.tar.bz2 | |
re PR tree-optimization/71691 (wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (Floating point exception))
PR tree-optimization/71691
* bitmap.h (class auto_bitmap): New.
* tree-ssa-loop-unswitch.c (tree_may_unswitch_on): Call
is_maybe_undefined instead of ssa_undefined_value_p.
From-SVN: r245057
Diffstat (limited to 'gcc/bitmap.h')
| -rw-r--r-- | gcc/bitmap.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/bitmap.h b/gcc/bitmap.h index 196738b..f158b44 100644 --- a/gcc/bitmap.h +++ b/gcc/bitmap.h @@ -802,4 +802,25 @@ bmp_iter_and_compl (bitmap_iterator *bi, unsigned *bit_no) bmp_iter_and_compl (&(ITER), &(BITNUM)); \ bmp_iter_next (&(ITER), &(BITNUM))) +/* A class that ties the lifetime of a bitmap to its scope. */ +class auto_bitmap +{ + public: + auto_bitmap () { bits = BITMAP_ALLOC (NULL); } + ~auto_bitmap () { BITMAP_FREE (bits); } + // Allow calling bitmap functions on our bitmap. + operator bitmap () { return bits; } + + private: + // Prevent making a copy that references our bitmap. + auto_bitmap (const auto_bitmap &); + auto_bitmap &operator = (const auto_bitmap &); +#if __cplusplus >= 201103L + auto_bitmap (auto_bitmap &&); + auto_bitmap &operator = (auto_bitmap &&); +#endif + + bitmap bits; +}; + #endif /* GCC_BITMAP_H */ |