| commit | 745ec2135aabfbe2c0fb7780309837d17e8986d4 | |
| author | Richard Biener <rguenther@suse.de> | |
| Thu, 17 Aug 2023 13:21:33 +0000 (17 15:21 +0200) | ||
| committer | Richard Biener <rguenther@suse.de> | |
| Fri, 18 Aug 2023 13:04:48 +0000 (18 15:04 +0200) | ||
| tree | cace58db1231dc2feb420dac5f24b84305790328 | treesnapshot (tar.gz zip) |
| parent | 35b5762a740d4506d7acac65d0f8375640362492 | commitdiff |
tree-optimization/111019 - invariant motion and aliasing
The following fixes a bad choice in representing things to the alias
oracle by LIM which while correct in pieces is inconsistent with itself.
When canonicalizing a ref to a bare deref instead of leaving the base
object and the extracted offset the same and just substituting an
alternate ref the following replaces the base and the offset as well,
avoiding the confusion that otherwise will arise in
aliasing_matching_component_refs_p.
PR tree-optimization/111019
* tree-ssa-loop-im.cc (gather_mem_refs_stmt): When canonicalizing
also scrap base and offset in case the ref is indirect.
* g++.dg/torture/pr111019.C: New testcase.
The following fixes a bad choice in representing things to the alias
oracle by LIM which while correct in pieces is inconsistent with itself.
When canonicalizing a ref to a bare deref instead of leaving the base
object and the extracted offset the same and just substituting an
alternate ref the following replaces the base and the offset as well,
avoiding the confusion that otherwise will arise in
aliasing_matching_component_refs_p.
PR tree-optimization/111019
* tree-ssa-loop-im.cc (gather_mem_refs_stmt): When canonicalizing
also scrap base and offset in case the ref is indirect.
* g++.dg/torture/pr111019.C: New testcase.
| gcc/testsuite/g++.dg/torture/pr111019.C | [new file with mode: 0644] | blob |
| gcc/tree-ssa-loop-im.cc | diffblobblamehistory |