gnu /
gcc /
f953c8bc5bf314a57a6ba347ee6f5f5e3f1dad53 tree-optimization/104156 - fix unswitching compare-debug issue
When hoisting guards the unswitching pass does not properly ignore
debug stmts when looking for uses outside of the loop of defs
produced in the skipped region. The following rectifies this
by instead collecting them and resetting them after the transform.
2022-01-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/104156
* tree-ssa-loop-unswitch.cc (tree_unswitch_outer_loop):
Collect and reset debug stmts with out-of-loop uses when
hoisting guards.
(find_loop_guard): Adjust.
(empty_bb_without_guard_p): Likewise. Ignore debug stmts.
(used_outside_loop_p): Push debug uses to a vector of
debug stmts to reset.
(hoist_guard): Adjust -fopt-info category.
* gcc.dg/loop-unswitch-6.c: New testcase.
2 files changed
