On 9/15/2021 2:46 AM, Martin Liška wrote:
Hello. The patch extends the loop unswitching pass so that gswitch statements are supported. The pass now uses ranger which marks switch edges that are known to be unreachable in a versioned loop. Patch can bootstrap on x86_64-linux-gnu and survives regression tests. Ready to be installed? Thanks, Martin gcc/ChangeLog: * tree-cfg.c (gimple_lv_add_condition_to_bb): Support non-gimple expressions that needs to be gimplified. * tree-ssa-loop-unswitch.c (tree_unswitch_loop): Add new cond_edge parameter. (tree_may_unswitch_on): Support gswitch statements. (clean_up_switches): New function. (tree_ssa_unswitch_loops): Call clean_up_switches. (simplify_using_entry_checks): Removed and replaced with ranger. (tree_unswitch_single_loop): Change assumptions. gcc/testsuite/ChangeLog: * gcc.dg/loop-unswitch-6.c: New test. * gcc.dg/loop-unswitch-7.c: New test. * gcc.dg/loop-unswitch-8.c: New test. * gcc.dg/loop-unswitch-9.c: New test.
LGTM. OK. Jeff
