https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85157
Bug ID: 85157
Summary: [parloops] Prevent canonicalize_loop_ivs failure in
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
In the commit r258713 "[parloops] Handle canonicalize_loop_ivs failure" (a
stage4 fix for PR83126) we bail out of gen_parallel_loop if we detect that
canonicalize_loop_ivs failed to do what we expected it to do: to rewrite all
simple loop ivs based on an a new canonical loop iv.
We need to fix this properly: rather than bail out, we need to ensure that the
rewrite succeeds, as the TODO added in gen_parallel_loop in r258713 mentions:
...
TODO: Fix this properly by ensuring that the call to
canonicalize_loop_ivs succeeds. */
..
