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| author | Richard Biener <rguenther@suse.de> | 2022-09-02 13:36:13 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-09-02 14:33:07 +0200 |
| commit | be1b42de9c151d46c89f9a8f82d4c5839a19ea94 (patch) | |
| tree | edf8f4c735300d5b6fb3d2a4d5fa28e3296c03cb /ar-lib | |
| parent | d72ca12b846a9f5c01674b280b1817876c77888f (diff) | |
| download | gcc-be1b42de9c151d46c89f9a8f82d4c5839a19ea94.zip gcc-be1b42de9c151d46c89f9a8f82d4c5839a19ea94.tar.gz gcc-be1b42de9c151d46c89f9a8f82d4c5839a19ea94.tar.bz2 | |
tree-optimization/106809 - compile time hog in VN
The dominated_by_p_w_unex function is prone to high compile time.
With GCC 12 we introduced a VN run for uninit diagnostics which now
runs into a degenerate case with bison generated code. Fortunately
this case is easy to fix with a simple extra check - a more
general fix needs more work.
PR tree-optimization/106809
* tree-ssa-sccvn.cc (dominaged_by_p_w_unex): Check we have
more than one successor before doing extra work.
* gcc.dg/torture/pr106809.c: New testcase.
Diffstat (limited to 'ar-lib')
0 files changed, 0 insertions, 0 deletions