; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 ; RUN: opt < %s -passes='print,simple-loop-unswitch' -verify-scev -S | FileCheck %s ; This is a reproducer for https://github.com/llvm/llvm-project/issues/61080 ; ; Note that the print in the beginning of the pipeline is ; needed for reproducing the original problem, as we need something that ; calculate SCEV before the loop unswitch, to verify that we invalidate SCEV ; correctly while doing the unswitch. ; ; Verify that we no longer hit that assert. Also perform checks to show the IR ; transformation that is going on in this test. define i32 @foo(i1 %not) { ; CHECK-LABEL: define i32 @foo ; CHECK-SAME: (i1 [[NOT:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[FALSE:%.*]] = and i1 true, false ; CHECK-NEXT: br i1 [[NOT]], label [[ENTRY_SPLIT_US:%.*]], label [[ENTRY_SPLIT:%.*]] ; CHECK: entry.split.us: ; CHECK-NEXT: br i1 [[FALSE]], label [[ENTRY_SPLIT_US_SPLIT_US:%.*]], label [[ENTRY_SPLIT_US_SPLIT:%.*]] ; CHECK: entry.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND_US_US:%.*]] ; CHECK: for.cond.us.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_US_US:%.*]] ; CHECK: for.cond.split.us.us.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US_SPLIT_US_SPLIT_US:%.*]] ; CHECK: for.cond.split.us.split.us.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US_SPLIT_US:%.*]] ; CHECK: entry.split.us.split: ; CHECK-NEXT: br label [[FOR_COND_US:%.*]] ; CHECK: for.cond.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_US:%.*]] ; CHECK: for.inc11.us: ; CHECK-NEXT: br label [[FOR_COND_US]] ; CHECK: for.cond.split.us.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US11:%.*]] ; CHECK: for.cond5.preheader.us.us9: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_US_US10:%.*]] ; CHECK: for.inc8.us.us: ; CHECK-NEXT: br i1 false, label [[FOR_INC8_FOR_COND5_PREHEADER_CRIT_EDGE_US_US:%.*]], label [[FOR_INC11_SPLIT_US_US:%.*]] ; CHECK: for.inc8.for.cond5.preheader_crit_edge.us.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US_US9:%.*]] ; CHECK: for.end.us.us: ; CHECK-NEXT: br i1 false, label [[FOR_INC8_US_US:%.*]], label [[CLEANUP15_SPLIT_US_SPLIT_US:%.*]] ; CHECK: for.cond5.preheader.split.us.us.us10: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US7_US:%.*]] ; CHECK: for.body7.us.us4.us: ; CHECK-NEXT: br label [[HANDLER_POINTER_OVERFLOW_US_US5_US:%.*]] ; CHECK: handler.pointer_overflow.us.us5.us: ; CHECK-NEXT: br label [[CONT_US_US6_US:%.*]] ; CHECK: cont.us.us6.us: ; CHECK-NEXT: br label [[FOR_END_SPLIT_US_US_US:%.*]] ; CHECK: for.end.split.us.us.us: ; CHECK-NEXT: br label [[FOR_END_US_US:%.*]] ; CHECK: for.cond5.preheader.split.us.split.us7.us: ; CHECK-NEXT: br label [[FOR_BODY7_US_US4_US:%.*]] ; CHECK: for.inc11.split.us.us: ; CHECK-NEXT: br label [[FOR_INC11_US:%.*]] ; CHECK: for.cond.split.us.split.us11: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US_US9]] ; CHECK: for.cond.split.us.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US:%.*]] ; CHECK: cleanup15.split.us.split.us: ; CHECK-NEXT: br label [[CLEANUP15_SPLIT_US:%.*]] ; CHECK: entry.split: ; CHECK-NEXT: br i1 [[FALSE]], label [[ENTRY_SPLIT_SPLIT_US:%.*]], label [[ENTRY_SPLIT_SPLIT:%.*]] ; CHECK: entry.split.split.us: ; CHECK-NEXT: br label [[FOR_COND_US12:%.*]] ; CHECK: for.cond.us12: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_US:%.*]] ; CHECK: for.cond.split.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_SPLIT_US_SPLIT_US:%.*]] ; CHECK: for.cond.split.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_SPLIT_US:%.*]] ; CHECK: entry.split.split: ; CHECK-NEXT: br label [[FOR_COND:%.*]] ; CHECK: for.cond: ; CHECK-NEXT: br label [[FOR_COND_SPLIT:%.*]] ; CHECK: for.cond.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US_US:%.*]] ; CHECK: for.cond5.preheader.us.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_US_US:%.*]] ; CHECK: for.cond5.preheader.split.us.us.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US_SPLIT_US_SPLIT_US:%.*]] ; CHECK: for.cond5.preheader.split.us.split.us.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US_SPLIT_US:%.*]] ; CHECK: cleanup15.split.us: ; CHECK-NEXT: br label [[CLEANUP15:%.*]] ; CHECK: for.cond5.preheader.split.us.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US:%.*]] ; CHECK: for.cond.split: ; CHECK-NEXT: br label [[FOR_COND_SPLIT_SPLIT:%.*]] ; CHECK: for.cond.split.split.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US8:%.*]] ; CHECK: for.cond5.preheader.us8: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US:%.*]] ; CHECK: for.cond5.preheader.split.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_SPLIT_US_SPLIT_US:%.*]] ; CHECK: for.cond5.preheader.split.split.us.split.us: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_SPLIT_US:%.*]] ; CHECK: for.cond.split.split: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER:%.*]] ; CHECK: for.cond5.preheader: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT:%.*]] ; CHECK: for.cond5.preheader.split.us.split.us: ; CHECK-NEXT: br label [[FOR_BODY7_US_US:%.*]] ; CHECK: for.body7.us.us: ; CHECK-NEXT: br label [[HANDLER_POINTER_OVERFLOW_US_US:%.*]] ; CHECK: handler.pointer_overflow.us.us: ; CHECK-NEXT: br label [[CONT_US_US:%.*]] ; CHECK: cont.us.us: ; CHECK-NEXT: br label [[CONT_FOR_BODY7_CRIT_EDGE_US_US:%.*]] ; CHECK: cont.for.body7_crit_edge.us.us: ; CHECK-NEXT: br label [[FOR_BODY7_US_US]] ; CHECK: for.cond5.preheader.split: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_SPLIT:%.*]] ; CHECK: for.cond5.preheader.split.split.us: ; CHECK-NEXT: br label [[FOR_BODY7_US1:%.*]] ; CHECK: for.body7.us1: ; CHECK-NEXT: br label [[CONT_US2:%.*]] ; CHECK: cont.us2: ; CHECK-NEXT: br label [[CONT_FOR_BODY7_CRIT_EDGE_US3:%.*]] ; CHECK: cont.for.body7_crit_edge.us3: ; CHECK-NEXT: br label [[FOR_BODY7_US1]] ; CHECK: for.cond5.preheader.split.split: ; CHECK-NEXT: br label [[FOR_BODY7:%.*]] ; CHECK: for.body7: ; CHECK-NEXT: br label [[CONT:%.*]] ; CHECK: cont: ; CHECK-NEXT: br label [[FOR_END_SPLIT:%.*]] ; CHECK: for.end.split: ; CHECK-NEXT: br label [[FOR_END:%.*]] ; CHECK: for.end: ; CHECK-NEXT: br i1 false, label [[FOR_INC8:%.*]], label [[CLEANUP15_SPLIT:%.*]] ; CHECK: for.inc8: ; CHECK-NEXT: br i1 false, label [[FOR_INC8_FOR_COND5_PREHEADER_CRIT_EDGE:%.*]], label [[FOR_INC11_SPLIT:%.*]] ; CHECK: for.inc8.for.cond5.preheader_crit_edge: ; CHECK-NEXT: br label [[FOR_COND5_PREHEADER]] ; CHECK: for.inc11.split: ; CHECK-NEXT: br label [[FOR_INC11:%.*]] ; CHECK: for.inc11: ; CHECK-NEXT: br label [[FOR_COND]] ; CHECK: cleanup15.split: ; CHECK-NEXT: br label [[CLEANUP15]] ; CHECK: cleanup15: ; CHECK-NEXT: ret i32 0 ; entry: %false = and i1 1, 0 br label %for.cond for.cond: ; preds = %for.inc11, %entry br label %for.cond5.preheader for.cond5.preheader: ; preds = %for.inc8.for.cond5.preheader_crit_edge, %for.cond br label %for.body7 for.body7: ; preds = %cont.for.body7_crit_edge, %for.cond5.preheader br i1 %not, label %handler.pointer_overflow, label %cont handler.pointer_overflow: ; preds = %for.body7 br label %cont cont: ; preds = %handler.pointer_overflow, %for.body7 br i1 %false, label %cont.for.body7_crit_edge, label %for.end cont.for.body7_crit_edge: ; preds = %cont br label %for.body7 for.end: ; preds = %cont br i1 %false, label %for.inc8, label %cleanup15 for.inc8: ; preds = %for.end br i1 %false, label %for.inc8.for.cond5.preheader_crit_edge, label %for.inc11 for.inc8.for.cond5.preheader_crit_edge: ; preds = %for.inc8 br label %for.cond5.preheader for.inc11: ; preds = %for.inc8 br label %for.cond cleanup15: ; preds = %for.end ret i32 0 }