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| author | Richard Biener <rguenther@suse.de> | 2017-06-14 07:22:32 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-06-14 07:22:32 +0000 |
| commit | 24d020bd46fc94b262af4f729aff24fb4ee8aca3 (patch) | |
| tree | 1607da50b4bc65f431ea6c5f2f50e41e6995f8a6 | |
| parent | 6aa397703c5802b14cbd00c1fd8cfd0b7c15934e (diff) | |
| download | gcc-24d020bd46fc94b262af4f729aff24fb4ee8aca3.zip gcc-24d020bd46fc94b262af4f729aff24fb4ee8aca3.tar.gz gcc-24d020bd46fc94b262af4f729aff24fb4ee8aca3.tar.bz2 | |
re PR tree-optimization/81083 (ICE: Unable to coalesce ssa_names 4 and 13 which are marked as MUST COALESCE)
2017-06-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/81083
* tree-ssa-sccvn.c (vn_reference_lookup_3): Do not use abnormals
as values.
* gcc.dg/torture/pr81083.c: New testcase.
From-SVN: r249182
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr81083.c | 13 | ||||
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 4 |
4 files changed, 27 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ab872e1..8960eab 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-06-14 Richard Biener <rguenther@suse.de> + + PR tree-optimization/81083 + * tree-ssa-sccvn.c (vn_reference_lookup_3): Do not use abnormals + as values. + 2017-06-13 Segher Boessenkool <segher@kernel.crashing.org> * config/rs6000/rs6000.c: Update all comments that mentioned SPE. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 1378dc8..0bc4384 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-06-14 Richard Biener <rguenther@suse.de> + + PR tree-optimization/81083 + * gcc.dg/torture/pr81083.c: New testcase. + 2017-06-14 Jakub Jelinek <jakub@redhat.com> * gcc.dg/tree-ssa/vrp101.c: Fix scan-tree-dump regex. diff --git a/gcc/testsuite/gcc.dg/torture/pr81083.c b/gcc/testsuite/gcc.dg/torture/pr81083.c new file mode 100644 index 0000000..39c3f63 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr81083.c @@ -0,0 +1,13 @@ +/* { dg-do compile } */ + +void a(int arg) +{ + extern struct { int x; } obj; + setjmp(); + obj.x = arg; + arg = arg; + if (obj.x) + func(); + if (obj.x) + func(); +} diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index ff5c800..419da47 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -2035,7 +2035,9 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_, ops[1] = bitsize_int (ref->size); ops[2] = bitsize_int (offset - offset2); tree val = vn_nary_build_or_lookup (rcode, vr->type, ops); - if (val) + if (val + && (TREE_CODE (val) != SSA_NAME + || ! SSA_NAME_OCCURS_IN_ABNORMAL_PHI (val))) { vn_reference_t res = vn_reference_lookup_or_insert_for_pieces (vuse, vr->set, vr->type, vr->operands, val); |