| commit | 8ebcea91e24964ec52ca2caf9f8585f3a785f7d5 | |
| author | Richard Biener <rguenther@suse.de> | |
| Thu, 9 Nov 2023 08:41:10 +0000 (9 09:41 +0100) | ||
| committer | Richard Biener <rguenther@suse.de> | |
| Thu, 9 Nov 2023 10:48:32 +0000 (9 11:48 +0100) | ||
| tree | d9ab4a5e57fcda68b7116ac9466be0e821124caa | treesnapshot (tar.gz zip) |
| parent | a0273d257ccf4d01997368d85f008094ab84db73 | commitdiff |
tree-optimization/112444 - avoid bougs PHI value-numbering
With .DEFERRED_INIT ssa_undefined_value_p () can return true for
values we did not visit (because they proved unreachable) but
are not .VN_TOP. Avoid using those as value which, because they
are not visited, are assumed to be defined outside of the region.
PR tree-optimization/112444
* tree-ssa-sccvn.cc (visit_phi): Avoid using not visited
defs as undefined vals.
* gcc.dg/torture/pr112444.c: New testcase.
With .DEFERRED_INIT ssa_undefined_value_p () can return true for
values we did not visit (because they proved unreachable) but
are not .VN_TOP. Avoid using those as value which, because they
are not visited, are assumed to be defined outside of the region.
PR tree-optimization/112444
* tree-ssa-sccvn.cc (visit_phi): Avoid using not visited
defs as undefined vals.
* gcc.dg/torture/pr112444.c: New testcase.
| gcc/testsuite/gcc.dg/torture/pr112444.c | [new file with mode: 0644] | blob |
| gcc/tree-ssa-sccvn.cc | diffblobblamehistory |