[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 --- Comment #8 from Jakub Jelinek --- E.g. PR93385.
[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 Jakub Jelinek changed: What|Removed |Added CC||jakub at gcc dot gnu.org --- Comment #7 from Jakub Jelinek --- Martin, any progress on this? Feels like PRs we've discussed in the past (and some of them have been fixed), where IPA passes assume something isn't really needed to be computed because all its uses will be dead, but doesn't actually DCE them and because DCE is disabled, it is still needed?
[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 Richard Biener changed: What|Removed |Added Priority|P3 |P2 Last reconfirmed|2022-12-07 00:00:00 |2022-12-21 --- Comment #6 from Richard Biener --- Martin, can you please have a look? Summary for node main/10: Returns value No parameter information. Summary for edge main/10->k/9: return value ignored Summary for node k/9: No parameter information. Summary for edge k/9->i/8: return value used only to compute caller return value Summary for node i/8: Returns value No parameter information. the k->i edge info looks misleading (the caller returns nothing), but the uses are all "dead". Eventually those dead stmts are now supposed to be cleaned up by the inliner because of the possibility of -fno-[tree-]dce, just in this case that isn't working? Not sure if really P2, but I guess return value removal isn't yet handled in that code path?
[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 Martin Liška changed: What|Removed |Added CC||jamborm at gcc dot gnu.org --- Comment #5 from Martin Liška --- (In reply to Andrew Pinski from comment #4) > Most likely due to r10-3311-gff6686d2e5f797 (the new IPA-SRA). Yes, it's since the revision.
[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 Andrew Pinski changed: What|Removed |Added Keywords|needs-bisection | --- Comment #4 from Andrew Pinski --- Most likely due to r10-3311-gff6686d2e5f797 (the new IPA-SRA).
[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 Andrew Pinski changed: What|Removed |Added Last reconfirmed||2022-12-07 Status|UNCONFIRMED |NEW Keywords||needs-bisection Ever confirmed|0 |1 --- Comment #3 from Andrew Pinski --- Confirmed.
[Bug ipa/108007] [10/11/12/13 Regression] wrong code at -Os and above with "-fno-dce -fno-tree-dce" on x86_64-linux-gnu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108007 Andrew Pinski changed: What|Removed |Added Summary|wrong code at -Os and above |[10/11/12/13 Regression] |with "-fno-dce |wrong code at -Os and above |-fno-tree-dce" on |with "-fno-dce |x86_64-linux-gnu|-fno-tree-dce" on ||x86_64-linux-gnu Known to fail||10.1.0, 11.1.0, 12.2.0 Target Milestone|--- |10.5 CC||marxin at gcc dot gnu.org Version|unknown |13.0 Component|tree-optimization |ipa Known to work||9.1.0 --- Comment #2 from Andrew Pinski --- == IPA-SRA decisions == Evaluating analysis results for i/8 Will remove return value. Created new node i.isra/12
