| commit | 97094d2ffd7d00261e6d7cc5d4a62dc7c2c89b64 | |
| author | Richard Biener <rguenther@suse.de> | |
| Wed, 13 Dec 2023 07:54:49 +0000 (13 08:54 +0100) | ||
| committer | Richard Biener <rguenther@suse.de> | |
| Wed, 13 Dec 2023 07:59:01 +0000 (13 08:59 +0100) | ||
| tree | f31a79bc61326149ad06a29fbf07a418571b339a | treesnapshot (tar.gz zip) |
| parent | 8e0568d8ac9dbfc8199f970c5c7f26b9735e0e7b | commitdiff |
middle-end/111591 - explain why TBAA doesn't need adjustment
While tidying the prototype patch I've done for the reduced testcase
in PR111591 and in that process trying to produce a testcase that
is miscompiled by stack slot coalescing and the TBAA info that
remains un-altered I've realized we do not need to adjust TBAA info.
The following documents this in the place we adjust points-to info
which we do need to adjust.
PR middle-end/111591
* cfgexpand.cc (update_alias_info_with_stack_vars): Document
why not adjusting TBAA info on accesses is OK.
While tidying the prototype patch I've done for the reduced testcase
in PR111591 and in that process trying to produce a testcase that
is miscompiled by stack slot coalescing and the TBAA info that
remains un-altered I've realized we do not need to adjust TBAA info.
The following documents this in the place we adjust points-to info
which we do need to adjust.
PR middle-end/111591
* cfgexpand.cc (update_alias_info_with_stack_vars): Document
why not adjusting TBAA info on accesses is OK.
| gcc/cfgexpand.cc | diffblobblamehistory |