[Bug tree-optimization/111878] [14 Regression] ICE: in get_loop_exit_edges, at cfgloop.cc:1204 with -O3 -fgraphite-identity -fsave-optimization-record/-fdump-tree-graphite/-fopt-info since r14-4708-gd
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111878 Sam James changed: What|Removed |Added CC||tnfchris at gcc dot gnu.org Summary|[14 Regression] ICE: in |[14 Regression] ICE: in |get_loop_exit_edges, at |get_loop_exit_edges, at |cfgloop.cc:1204 with -O3|cfgloop.cc:1204 with -O3 |-fgraphite-identity |-fgraphite-identity |-fsave-optimization-record/ |-fsave-optimization-record/ |-fdump-tree-graphite/-fopt- |-fdump-tree-graphite/-fopt- |info|info since ||r14-4708-gd65e38e616e7ac --- Comment #6 from Sam James --- d65e38e616e7ac8157ef04b55beb6670f2c0f142 is the first bad commit commit d65e38e616e7ac8157ef04b55beb6670f2c0f142 Author: Tamar Christina Date: Wed Oct 18 09:02:12 2023 +0100 middle-end: Refactor vectorizer loop conditionals and separate out IV to new variables i.e. r14-4708-gd65e38e616e7ac
[Bug tree-optimization/111878] [14 Regression] ICE: in get_loop_exit_edges, at cfgloop.cc:1204 with -O3 -fgraphite-identity -fsave-optimization-record/-fdump-tree-graphite/-fopt-info since r14-4708-gd
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111878 Tamar Christina changed: What|Removed |Added Assignee|unassigned at gcc dot gnu.org |tnfchris at gcc dot gnu.org --- Comment #7 from Tamar Christina --- Thanks for the report. Graphite is feeding it a junk loop. The loop's latch block is invalid. In fact the block isn't even part of the loop. Since the loop structure Graphite passes it is broken, get_loop_exit_edges (..) asserts. Previously for this situation the call would silently return NULL for such loops. I'd argue this is a bug in Graphite, but will restore the return NULL for broken loops.
[Bug tree-optimization/111878] [14 Regression] ICE: in get_loop_exit_edges, at cfgloop.cc:1204 with -O3 -fgraphite-identity -fsave-optimization-record/-fdump-tree-graphite/-fopt-info since r14-4708-gd
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111878 --- Comment #8 from CVS Commits --- The master branch has been updated by Tamar Christina : https://gcc.gnu.org/g:7a496b7ce105185be12e023e749c90d5f7561879 commit r14-5529-g7a496b7ce105185be12e023e749c90d5f7561879 Author: Tamar Christina Date: Thu Nov 16 12:11:22 2023 + middle-end: skip checking loop exits if loop malformed [PR111878] Before my refactoring if the loop->latch was incorrect then find_loop_location skipped checking the edges and would eventually return a dummy location. It turns out that a loop can have loops_state_satisfies_p (LOOPS_HAVE_RECORDED_EXITS) but also not have a latch in which case get_loop_exit_edges traps. This restores the old behavior. gcc/ChangeLog: PR tree-optimization/111878 * tree-vect-loop-manip.cc (find_loop_location): Skip edges check if latch incorrect. gcc/testsuite/ChangeLog: PR tree-optimization/111878 * gcc.dg/graphite/pr111878.c: New test.
[Bug tree-optimization/111878] [14 Regression] ICE: in get_loop_exit_edges, at cfgloop.cc:1204 with -O3 -fgraphite-identity -fsave-optimization-record/-fdump-tree-graphite/-fopt-info since r14-4708-gd
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111878 Tamar Christina changed: What|Removed |Added Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #9 from Tamar Christina --- Fixed, thanks for the report.
