| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=loop-bound-split -S < %s | FileCheck %s |
| |
| ; LoopBoundSplit pass should fail to split this test's loop because the split |
| ; condition is false in first iteration of the loop. |
| |
| define i16 @main(i16 %qqq) { |
| ; CHECK-LABEL: @main( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[T0:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[T8:%.*]], [[CONT19:%.*]] ] |
| ; CHECK-NEXT: [[T1:%.*]] = shl nuw nsw i16 [[T0]], 1 |
| ; CHECK-NEXT: [[T2:%.*]] = add i16 [[T1]], [[QQQ:%.*]] |
| ; CHECK-NEXT: [[DOTNOT9:%.*]] = icmp ult i16 [[T2]], [[QQQ]] |
| ; CHECK-NEXT: br i1 [[DOTNOT9]], label [[HANDLER_POINTER_OVERFLOW:%.*]], label [[CONT15_CRITEDGE:%.*]] |
| ; CHECK: handler.pointer_overflow: |
| ; CHECK-NEXT: call void @__ubsan_handle_pointer_overflow() |
| ; CHECK-NEXT: br label [[CONT19]] |
| ; CHECK: cont15.critedge: |
| ; CHECK-NEXT: br label [[CONT19]] |
| ; CHECK: cont19: |
| ; CHECK-NEXT: [[T8]] = add nuw nsw i16 [[T0]], 1 |
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i16 [[T8]], 3 |
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY]] |
| ; CHECK: for.cond.cleanup: |
| ; CHECK-NEXT: ret i16 0 |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: |
| %t0 = phi i16 [ 0, %entry ], [ %t8, %cont19 ] |
| %t1 = shl nuw nsw i16 %t0, 1 |
| %t2 = add i16 %t1, %qqq |
| %.not9 = icmp ult i16 %t2, %qqq |
| br i1 %.not9, label %handler.pointer_overflow, label %cont15.critedge |
| |
| handler.pointer_overflow: |
| call void @__ubsan_handle_pointer_overflow() |
| br label %cont19 |
| |
| cont15.critedge: |
| br label %cont19 |
| |
| cont19: |
| %t8 = add nuw nsw i16 %t0, 1 |
| %exitcond.not = icmp eq i16 %t8, 3 |
| br i1 %exitcond.not, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret i16 0 |
| } |
| |
| declare dso_local void @__ubsan_handle_pointer_overflow() |