diff options
| author | jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-11-10 17:53:21 +0000 |
|---|---|---|
| committer | jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-11-10 17:53:21 +0000 |
| commit | 664dd751bcadcd02581217faa6848d35270f36f3 (patch) | |
| tree | e13c3ceaa56a47f629109a9a6d9f8fcd7fa67357 | |
| parent | 06b040bd1cbf3004fc4290ed1bc16141f2459e32 (diff) | |
| download | gcc-664dd751bcadcd02581217faa6848d35270f36f3.tar.gz | |
[PATCH] Partially fix PR61529, bound basic block frequency
2014-11-10 Renlin Li <Renlin.Li@arm.com>
PR middle-end/61529
gcc/
* tree-ssa-threadupdate.c (compute_path_counts): Bound path_in_freq.
gcc/testsuite/
* gcc.dg/pr61529.c: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@217303 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr61529.c | 27 | ||||
| -rw-r--r-- | gcc/tree-ssa-threadupdate.c | 5 |
4 files changed, 42 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4b70b620869..f29986b6682 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2014-11-10 Renlin Li <renlin.li@arm.com> + + PR middle-end/61529 + * tree-ssa-threadupdate.c (compute_path_counts): Bound path_in_freq. + 2014-11-10 Thomas Preud'homme <thomas.preudhomme@arm.com> * expmed.c (expand_shift_1): Expand 8 bit rotate of 16 bit value to diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 3af1a43c8f2..ece3d52259b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2014-11-10 Renlin Li <renlin.li@arm.com> + + PR middle-end/61529 + * gcc.dg/pr61529.c: New. + 2014-11-10 Bernd Schmidt <bernds@codesourcery.com> * lib/target-supports.exp (check_effective_target_return_address): diff --git a/gcc/testsuite/gcc.dg/pr61529.c b/gcc/testsuite/gcc.dg/pr61529.c new file mode 100644 index 00000000000..392239e7158 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr61529.c @@ -0,0 +1,27 @@ +/* PR middle-end/61529 */ +/* { dg-do compile } */ +/* { dg-options "-O3" } */ + +unsigned int a = 0, b = 0; +unsigned int c; + +int +main () +{ + unsigned int d = 0; + int e[5]; + + for (; b < 1; b++) + d = 0; + for (; d < 1; d++) + a = 0; + for (; a < 1; a++) + ; + + for (c = 0; c < 5; c++) + e[c] = 1; + if (e[0]) + c = 0; + + return 0; +} diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c index 5d838c3c25f..151ed839547 100644 --- a/gcc/tree-ssa-threadupdate.c +++ b/gcc/tree-ssa-threadupdate.c @@ -734,6 +734,11 @@ compute_path_counts (struct redirection_data *rd, nonpath_count += ein->count; } } + + /* This is needed due to insane incoming frequencies. */ + if (path_in_freq > BB_FREQ_MAX) + path_in_freq = BB_FREQ_MAX; + BITMAP_FREE (in_edge_srcs); /* Now compute the fraction of the total count coming into the first |