diff options
| author | Richard Biener <rguenther@suse.de> | 2022-08-02 12:19:25 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-08-02 13:29:36 +0200 |
| commit | 0f3514756e0b4d8993ee43dcd958974eb1424061 (patch) | |
| tree | da9ea9303cf132fb3366aced5f89916efe01a856 | |
| parent | 84beef30a51988e77e9df3104ed6203756172d65 (diff) | |
tree-optimization/106497 - more forward threader can-copy-bb
This adds EDGE_COPY_SRC_JOINER_BLOCK sources to the set of blocks
we need to check we can duplicate.
PR tree-optimization/106497
* tree-ssa-threadupdate.cc (fwd_jt_path_registry::update_cfg):
Also verify we can copy EDGE_COPY_SRC_JOINER_BLOCK.
* gcc.dg/torture/pr106497.c: New testcase.
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr106497.c | 20 | ||||
| -rw-r--r-- | gcc/tree-ssa-threadupdate.cc | 3 |
2 files changed, 22 insertions, 1 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr106497.c b/gcc/testsuite/gcc.dg/torture/pr106497.c new file mode 100644 index 00000000000..601200de9e3 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr106497.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-fno-tree-dce" } */ + +int n; + +__attribute__ ((pure,returns_twice)) int +bar (void); + +int +foo (int x) +{ + n = 0; + + bar (); + + if (x && n) + return 0; + + foo (x); +} diff --git a/gcc/tree-ssa-threadupdate.cc b/gcc/tree-ssa-threadupdate.cc index 0f2b319d44a..59c268a3567 100644 --- a/gcc/tree-ssa-threadupdate.cc +++ b/gcc/tree-ssa-threadupdate.cc @@ -2679,7 +2679,8 @@ fwd_jt_path_registry::update_cfg (bool may_peel_loop_headers) { edge e = (*path)[j]->e; if (m_removed_edges->find_slot (e, NO_INSERT) - || ((*path)[j]->type == EDGE_COPY_SRC_BLOCK + || (((*path)[j]->type == EDGE_COPY_SRC_BLOCK + || (*path)[j]->type == EDGE_COPY_SRC_JOINER_BLOCK) && !can_duplicate_block_p (e->src))) break; } |