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| author | Richard Biener <rguenther@suse.de> | 2018-08-27 14:17:03 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-08-27 14:17:03 +0000 |
| commit | efc3a1a101184a73718bcb034e530e57cd65a543 (patch) | |
| tree | ac8a0f32f451eb4a03dcf94123aa557266812792 | |
| parent | de5b5228631d14e272ec8bf93827dea3da16a33d (diff) | |
| download | gcc-efc3a1a101184a73718bcb034e530e57cd65a543.zip gcc-efc3a1a101184a73718bcb034e530e57cd65a543.tar.gz gcc-efc3a1a101184a73718bcb034e530e57cd65a543.tar.bz2 | |
re PR tree-optimization/86927 (Gcc miscompiles at -O3 on valid code)
2018-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/86927
* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
use const cond reduction code.
* gcc.dg/vect/pr86927.c: New testcase.
From-SVN: r263888
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/vect/pr86927.c | 15 | ||||
| -rw-r--r-- | gcc/tree-vect-loop.c | 3 |
4 files changed, 29 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 123d76c..d27a7a8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-08-27 Richard Biener <rguenther@suse.de> + + PR tree-optimization/86927 + * tree-vect-loop.c (vect_create_epilog_for_reduction): Properly + use const cond reduction code. + 2018-08-27 Alexander Monakov <amonakov@ispras.ru> PR tree-optimization/85758 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index aa957ee..8ebadb0 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2018-08-27 Richard Biener <rguenther@suse.de> + + PR tree-optimization/86927 + * gcc.dg/vect/pr86927.c: New testcase. + 2018-08-27 David Malcolm <dmalcolm@redhat.com> PR 87091 diff --git a/gcc/testsuite/gcc.dg/vect/pr86927.c b/gcc/testsuite/gcc.dg/vect/pr86927.c new file mode 100644 index 0000000..794092b --- /dev/null +++ b/gcc/testsuite/gcc.dg/vect/pr86927.c @@ -0,0 +1,15 @@ +#include "tree-vect.h" + +int a[28]; +int main() +{ + check_vect (); + a[4] = 1; + int c = 1; + for (int b = 0; b < 8; b++) + if (a[b]) + c = 0; + if (c) + abort(); + return 0; +} diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index d5e3552..124a4be 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -5197,6 +5197,9 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, if (STMT_VINFO_VEC_REDUCTION_TYPE (stmt_info) == INTEGER_INDUC_COND_REDUCTION) code = induc_code; + else if (STMT_VINFO_VEC_REDUCTION_TYPE (stmt_info) + == CONST_COND_REDUCTION) + code = STMT_VINFO_VEC_CONST_COND_REDUC_CODE (stmt_info); else code = MAX_EXPR; } |