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| author | Martin Liska <mliska@suse.cz> | 2016-06-23 13:04:35 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2016-06-23 11:04:35 +0000 |
| commit | 60fa7862a0a1ad80f587cb29bcc8613a78303f90 (patch) | |
| tree | df16bfb9e6381769574b4fdd31b09baa90fe3fcf /gcc | |
| parent | a34c0db51e718fc4d6a50cb5f2e20154a032158d (diff) | |
| download | gcc-60fa7862a0a1ad80f587cb29bcc8613a78303f90.zip gcc-60fa7862a0a1ad80f587cb29bcc8613a78303f90.tar.gz gcc-60fa7862a0a1ad80f587cb29bcc8613a78303f90.tar.bz2 | |
re PR middle-end/71619 (ICE: in predict_loops, at predict.c:1772 with --param=max-predicted-iterations=0)
Fix PR middle-end/71619
PR middle-end/71619
* predict.c (predict_loops): Revert the hunk that was removed
in r237103.
* gcc.dg/pr71619.c: New test.
From-SVN: r237730
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/predict.c | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr71619.c | 11 |
4 files changed, 26 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 81f1b4d..850a3ca 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-06-23 Martin Liska <mliska@suse.cz> + + PR middle-end/71619 + * predict.c (predict_loops): Revert the hunk that was removed + in r237103. + 2016-06-23 Jakub Sejdak <jakub.sejdak@phoesys.com> * config.gcc: Add support for arm*-*-phoenix* targets. diff --git a/gcc/predict.c b/gcc/predict.c index 470de8a..d505d9c 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -1769,7 +1769,11 @@ predict_loops (void) else continue; - gcc_checking_assert (nitercst); + /* If the prediction for number of iterations is zero, do not + predict the exit edges. */ + if (nitercst == 0) + continue; + probability = RDIV (REG_BR_PROB_BASE, nitercst); predict_edge (ex, predictor, probability); } diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 54a1d47..287baf6 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2016-06-23 Martin Liska <mliska@suse.cz> + + * gcc.dg/pr71619.c: New test. + 2016-06-23 H.J. Lu <hongjiu.lu@intel.com> PR target/67400 diff --git a/gcc/testsuite/gcc.dg/pr71619.c b/gcc/testsuite/gcc.dg/pr71619.c new file mode 100644 index 0000000..e1404bc --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr71619.c @@ -0,0 +1,11 @@ +/* PR 71619 */ + +/* { dg-do compile } */ +/* { dg-options "-O --param=max-predicted-iterations=0" } */ + +void +foo () +{ + int count = -10; + while (count++); +} |