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| author | Richard Biener <rguenther@suse.de> | 2017-02-08 08:30:48 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-02-08 08:30:48 +0000 |
| commit | d798497efc24b3787683cd31ead1863fa7a461f5 (patch) | |
| tree | e67e19eeba496fbeca4050cfa440bcc25e72fd05 /gcc/graphite-scop-detection.c | |
| parent | 41cf3f3eb91e46b1465715053791612a1a1d482d (diff) | |
| download | gcc-d798497efc24b3787683cd31ead1863fa7a461f5.zip gcc-d798497efc24b3787683cd31ead1863fa7a461f5.tar.gz gcc-d798497efc24b3787683cd31ead1863fa7a461f5.tar.bz2 | |
re PR tree-optimization/71824 (ICE when compiling libiberty with Graphite loop optimizations)
2017-02-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/71824
* graphite-scop-detection.c (scop_detection::build_scop_breadth):
Check all loops contained in the merged region.
* gcc.dg/graphite/pr71824-2.c: New testcase.
From-SVN: r245270
Diffstat (limited to 'gcc/graphite-scop-detection.c')
| -rw-r--r-- | gcc/graphite-scop-detection.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/gcc/graphite-scop-detection.c b/gcc/graphite-scop-detection.c index 2f96412..ee1f705 100644 --- a/gcc/graphite-scop-detection.c +++ b/gcc/graphite-scop-detection.c @@ -905,9 +905,19 @@ scop_detection::build_scop_breadth (sese_l s1, loop_p loop) sese_l combined = merge_sese (s1, s2); - if (combined - && loop_is_valid_in_scop (loop, combined) - && loop_is_valid_in_scop (loop->next, combined)) + /* Combining adjacent loops may add unrelated loops into the + region so we have to check all sub-loops of the outer loop + that are in the combined region. */ + if (combined) + for (l = loop_outer (loop)->inner; l; l = l->next) + if (bb_in_sese_p (l->header, combined) + && ! loop_is_valid_in_scop (l, combined)) + { + combined = invalid_sese; + break; + } + + if (combined) s1 = combined; else add_scop (s2); |