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| author | Eric Botcazou <ebotcazou@adacore.com> | 2017-11-27 11:56:36 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2017-11-27 11:56:36 +0000 |
| commit | ff27462edc398ca82e86c8c7f13d9fab498ba5c1 (patch) | |
| tree | 08222828f4dd3f24e1e5561f204474cdf8789d12 /gcc/cfgloop.h | |
| parent | 39335d1486c5f39182bd0cca6af52a49386319cb (diff) | |
| download | gcc-ff27462edc398ca82e86c8c7f13d9fab498ba5c1.zip gcc-ff27462edc398ca82e86c8c7f13d9fab498ba5c1.tar.gz gcc-ff27462edc398ca82e86c8c7f13d9fab498ba5c1.tar.bz2 | |
cfgloop.h (struct loop): Document usage of USHRT_MAX for unroll.
* cfgloop.h (struct loop): Document usage of USHRT_MAX for unroll.
* loop-unroll.c (decide_unroll_constant_iterations): Implement it.
(decide_unroll_runtime_iterations): Likewise.
(decide_unroll_stupid): Likewise.
From-SVN: r255165
Diffstat (limited to 'gcc/cfgloop.h')
| -rw-r--r-- | gcc/cfgloop.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/cfgloop.h b/gcc/cfgloop.h index be2ba8c..dce01bd 100644 --- a/gcc/cfgloop.h +++ b/gcc/cfgloop.h @@ -221,9 +221,10 @@ struct GTY ((chain_next ("%h.next"))) loop { /* True if the loop is part of an oacc kernels region. */ unsigned in_oacc_kernels_region : 1; - /* The number of times to unroll the loop. 0, means no information - given, just do what we always do. A value of 1, means don't unroll - the loop. */ + /* The number of times to unroll the loop. 0 means no information given, + just do what we always do. A value of 1 means do not unroll the loop. + A value of USHRT_MAX means unroll with no specific unrolling factor. + Other values means unroll with the given unrolling factor. */ unsigned short unroll; /* For SIMD loops, this is a unique identifier of the loop, referenced |