public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r13-2031] tree-optimization/106593 - fix ICE with backward threading
@ 2022-08-12 11:37 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2022-08-12 11:37 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:4cc0d3ebaee4b54280ff0466d8e5b351a3b5bacc
commit r13-2031-g4cc0d3ebaee4b54280ff0466d8e5b351a3b5bacc
Author: Richard Biener <rguenther@suse.de>
Date: Fri Aug 12 12:20:13 2022 +0200
tree-optimization/106593 - fix ICE with backward threading
With the last re-org I failed to make sure to not add SSA names
nor supported by ranger into m_imports which then triggers an
ICE in range_on_path_entry because range_of_expr returns false.
PR tree-optimization/106593
* tree-ssa-threadbackward.cc (back_threader::find_paths):
If the imports from the conditional do not satisfy
gimple_range_ssa_p don't try to thread anything.
Diff:
---
gcc/tree-ssa-threadbackward.cc | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-ssa-threadbackward.cc b/gcc/tree-ssa-threadbackward.cc
index 546a776bd91..b886027fccf 100644
--- a/gcc/tree-ssa-threadbackward.cc
+++ b/gcc/tree-ssa-threadbackward.cc
@@ -518,7 +518,11 @@ back_threader::find_paths (basic_block bb, tree name)
bitmap_clear (m_imports);
ssa_op_iter iter;
FOR_EACH_SSA_TREE_OPERAND (name, stmt, iter, SSA_OP_USE)
- bitmap_set_bit (m_imports, SSA_NAME_VERSION (name));
+ {
+ if (!gimple_range_ssa_p (name))
+ return;
+ bitmap_set_bit (m_imports, SSA_NAME_VERSION (name));
+ }
// Interesting is the set of imports we still not have see
// the definition of. So while imports only grow, the
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-08-12 11:37 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-08-12 11:37 [gcc r13-2031] tree-optimization/106593 - fix ICE with backward threading Richard Biener
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).