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| author | Richard Biener <rguenther@suse.de> | 2021-08-27 09:47:49 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-08-27 09:51:26 +0200 |
| commit | 41439e1f6d2da1e86538c726f0603cffd5dd098e (patch) | |
| tree | 65fca8bcd2717417c16756e02f9a2270e859da91 /gcc/config/darwin.c | |
| parent | 44a545a6abdd330083c1d12ad70092defbba702a (diff) | |
| download | gcc-41439e1f6d2da1e86538c726f0603cffd5dd098e.zip gcc-41439e1f6d2da1e86538c726f0603cffd5dd098e.tar.gz gcc-41439e1f6d2da1e86538c726f0603cffd5dd098e.tar.bz2 | |
tree-optimization/45178 - DCE of dead control flow in infinite loop
This fixes DCE to be able to elide dead control flow in an
infinite loop without an exit edge. This special situation is
handled well by the code finding an edge to preserve since there's
no chance it will find the exit edge and make the loop finite.
2021-08-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/45178
* tree-ssa-dce.c (find_obviously_necessary_stmts): For
infinite loops without exit do not mark control dependent
edges of the latch necessary.
* gcc.dg/tree-ssa/ssa-dce-3.c: Adjust testcase.
Diffstat (limited to 'gcc/config/darwin.c')
0 files changed, 0 insertions, 0 deletions