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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-04-11 17:32:54 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-04-11 17:32:54 +0000 |
| commit | 7bcba067fbc02490829567b87b878bf92a42a047 (patch) | |
| tree | d0aea9c90c9f68ddc9d3b8158f8c669005edd1b5 | |
| parent | 7bbc6c394bfcdc8a31d41866cd474574e6987059 (diff) | |
| download | gcc-7bcba067fbc02490829567b87b878bf92a42a047.tar.gz | |
PR tree-optimization/65735
* tree-ssa-threadedge.c (fsm_find_control_statement_thread_paths):
Remove visited_phis argument, add visited_bbs, avoid recursing into the
same bb rather than just into the same phi node.
(thread_through_normal_block): Adjust caller.
* gcc.c-torture/compile/pr65735.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222011 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr65735.c | 21 | ||||
| -rw-r--r-- | gcc/tree-ssa-threadedge.c | 12 |
4 files changed, 40 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d00103179d2..ce59ef8087b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2015-04-11 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/65735 + * tree-ssa-threadedge.c (fsm_find_control_statement_thread_paths): + Remove visited_phis argument, add visited_bbs, avoid recursing into the + same bb rather than just into the same phi node. + (thread_through_normal_block): Adjust caller. + 2015-04-11 Gerald Pfeifer <gerald@pfeifer.com> * doc/contrib.texi (Contributors): Add Ira Rosen. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 1d724979895..75c3b44cf26 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2015-04-11 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/65735 + * gcc.c-torture/compile/pr65735.c: New test. + 2015-04-11 H.J. Lu <hongjiu.lu@intel.com> PR middle-end/65554 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr65735.c b/gcc/testsuite/gcc.c-torture/compile/pr65735.c new file mode 100644 index 00000000000..c30de8ea398 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr65735.c @@ -0,0 +1,21 @@ +/* PR tree-optimization/65735 */ + +int foo (void); + +void +bar (int a, int b, int c) +{ + while (!a) + { + c = foo (); + if (c == 7) + c = b; + switch (c) + { + case 1: + a = b++; + if (b) + b = 1; + } + } +} diff --git a/gcc/tree-ssa-threadedge.c b/gcc/tree-ssa-threadedge.c index 7187d065e91..90c1e2af94a 100644 --- a/gcc/tree-ssa-threadedge.c +++ b/gcc/tree-ssa-threadedge.c @@ -1015,7 +1015,7 @@ static int max_threaded_paths; static void fsm_find_control_statement_thread_paths (tree expr, - hash_set<gimple> *visited_phis, + hash_set<basic_block> *visited_bbs, vec<basic_block, va_gc> *&path, bool seen_loop_phi) { @@ -1034,7 +1034,7 @@ fsm_find_control_statement_thread_paths (tree expr, return; /* Avoid infinite recursion. */ - if (visited_phis->add (def_stmt)) + if (visited_bbs->add (var_bb)) return; gphi *phi = as_a <gphi *> (def_stmt); @@ -1109,7 +1109,7 @@ fsm_find_control_statement_thread_paths (tree expr, { vec_safe_push (path, bbi); /* Recursively follow SSA_NAMEs looking for a constant definition. */ - fsm_find_control_statement_thread_paths (arg, visited_phis, path, + fsm_find_control_statement_thread_paths (arg, visited_bbs, path, seen_loop_phi); path->pop (); @@ -1391,13 +1391,13 @@ thread_through_normal_block (edge e, vec<basic_block, va_gc> *bb_path; vec_alloc (bb_path, n_basic_blocks_for_fn (cfun)); vec_safe_push (bb_path, e->dest); - hash_set<gimple> *visited_phis = new hash_set<gimple>; + hash_set<basic_block> *visited_bbs = new hash_set<basic_block>; max_threaded_paths = PARAM_VALUE (PARAM_MAX_FSM_THREAD_PATHS); - fsm_find_control_statement_thread_paths (cond, visited_phis, bb_path, + fsm_find_control_statement_thread_paths (cond, visited_bbs, bb_path, false); - delete visited_phis; + delete visited_bbs; vec_free (bb_path); } return 0; |