[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 --- Comment #6 from GCC Commits --- The releases/gcc-14 branch has been updated by Jan Hubicka : https://gcc.gnu.org/g:c5397d343ff1365fcebcf3ebabe140608874aac3 commit r14-10487-gc5397d343ff1365fcebcf3ebabe140608874aac3 Author: Jan Hubicka Date: Mon Jul 22 18:01:57 2024 +0200 Compare loop bounds in ipa-icf Hi, this testcase shows another poblem with missing comparators for metadata in ICF. With value ranges available to loop optimizations during early opts we can estimate number of iterations based on guarding condition that can be split away by the fnsplit pass. This patch disables ICF when number of iteraitons does not match. Bootstrapped/regtesed x86_64-linux, will commit it shortly gcc/ChangeLog: PR ipa/115277 * ipa-icf-gimple.cc (func_checker::compare_loops): compare loop bounds. gcc/testsuite/ChangeLog: * gcc.c-torture/compile/pr115277.c: New test. (cherry picked from commit 0d19fbc7b0760ce665fa6a88cd40cfa0311358d7)
[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 Sam James changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2024-07-22 Ever confirmed|0 |1 --- Comment #5 from Sam James --- honza, should that be in execute/ instead?
[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 --- Comment #4 from GCC Commits --- The master branch has been updated by Jan Hubicka : https://gcc.gnu.org/g:0d19fbc7b0760ce665fa6a88cd40cfa0311358d7 commit r15-2200-g0d19fbc7b0760ce665fa6a88cd40cfa0311358d7 Author: Jan Hubicka Date: Mon Jul 22 18:01:57 2024 +0200 Compare loop bounds in ipa-icf Hi, this testcase shows another poblem with missing comparators for metadata in ICF. With value ranges available to loop optimizations during early opts we can estimate number of iterations based on guarding condition that can be split away by the fnsplit pass. This patch disables ICF when number of iteraitons does not match. Bootstrapped/regtesed x86_64-linux, will commit it shortly gcc/ChangeLog: PR ipa/115277 * ipa-icf-gimple.cc (func_checker::compare_loops): compare loop bounds. gcc/testsuite/ChangeLog: * gcc.c-torture/compile/pr115277.c: New test.
[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 Richard Biener changed: What|Removed |Added Target Milestone|--- |13.4
[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 --- Comment #3 from Jan Hubicka --- > What about gcc 13? GCC 13 also misoptimizes. Honza
[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 --- Comment #2 from Martin Jambor --- (In reply to Jan Hubicka from comment #1) > Reproduces on 14 and trunk. GCC 12 is not able to determine the loop bound > during early optimizations What about gcc 13?
[Bug middle-end/115277] [13/14/15 regression] ICF needs to match loop bound estimates
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115277 Jan Hubicka changed: What|Removed |Added Summary|ICF needs to match loop |[13/14/15 regression] ICF |bound estimates |needs to match loop bound ||estimates --- Comment #1 from Jan Hubicka --- Reproduces on 14 and trunk. GCC 12 is not able to determine the loop bound during early optimizations
