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| author | Eric Botcazou <ebotcazou@adacore.com> | 2019-03-11 11:37:46 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2019-03-11 11:37:46 +0000 |
| commit | cb90c0014070f4ace5bb88258b31c1d654162306 (patch) | |
| tree | 67e4547921b424a18aea9fc7f615bce6bcb2d254 /gcc | |
| parent | 03001a351528a1fc35bfe0c70deb08c7e18d314b (diff) | |
| download | gcc-cb90c0014070f4ace5bb88258b31c1d654162306.zip gcc-cb90c0014070f4ace5bb88258b31c1d654162306.tar.gz gcc-cb90c0014070f4ace5bb88258b31c1d654162306.tar.bz2 | |
re PR rtl-optimization/89588 (ICE in unroll_loop_constant_iterations, at loop-unroll.c:498)
PR rtl-optimization/89588
* loop-unroll.c (decide_unroll_constant_iterations): Make guard for
explicit unrolling factor more robust.
From-SVN: r269579
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/loop-unroll.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/c-c++-common/unroll-6.c | 9 |
4 files changed, 20 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cf2e61d..989f883 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2019-03-11 Eric Botcazou <ebotcazou@adacore.com> + + PR rtl-optimization/89588 + * loop-unroll.c (decide_unroll_constant_iterations): Make guard for + explicit unrolling factor more robust. + 2019-03-11 Richard Biener <rguenther@suse.de> PR tree-optimization/89649 diff --git a/gcc/loop-unroll.c b/gcc/loop-unroll.c index cbc6673..0164762 100644 --- a/gcc/loop-unroll.c +++ b/gcc/loop-unroll.c @@ -400,7 +400,7 @@ decide_unroll_constant_iterations (struct loop *loop, int flags) { /* However we cannot unroll completely at the RTL level a loop with constant number of iterations; it should have been peeled instead. */ - if ((unsigned) loop->unroll - 1 > desc->niter - 2) + if ((unsigned) loop->unroll > desc->niter - 1) { if (dump_file) fprintf (dump_file, ";; Loop should have been peeled\n"); diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ac02d28..e8d393a 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2019-03-11 Eric Botcazou <ebotcazou@adacore.com> + + * c-c++-common/unroll-6.c: New test. + 2019-03-11 Paolo Carlini <paolo.carlini@oracle.com> PR c++/87571 diff --git a/gcc/testsuite/c-c++-common/unroll-6.c b/gcc/testsuite/c-c++-common/unroll-6.c new file mode 100644 index 0000000..fd74f19 --- /dev/null +++ b/gcc/testsuite/c-c++-common/unroll-6.c @@ -0,0 +1,9 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fno-tree-loop-optimize" } */ + +void test (void) +{ + #pragma GCC unroll 2 + for (int nv = 0; nv <= 2; nv += 2) + {} +} |