1 ; Ensure we don't run analyses over loops after they've been deleted. We run 2 ; one version with a no-op loop pass to make sure that the loop doesn't get 3 ; simplified away. 4 ; 5 ; RUN: opt < %s -passes='require<ivusers>,no-op-loop,require<ivusers>' -S \ 6 ; RUN: | FileCheck %s --check-prefixes=CHECK,BEFORE 7 ; RUN: opt < %s -passes='require<ivusers>,loop-deletion,require<ivusers>' -S \ 8 ; RUN: | FileCheck %s --check-prefixes=CHECK,AFTER 9 10 11 define void @foo(i64 %n, i64 %m) nounwind { 12 ; CHECK-LABEL: @foo( 13 14 entry: 15 br label %bb 16 ; CHECK: entry: 17 ; BEFORE-NEXT: br label %bb 18 ; AFTER-NEXT: br label %return 19 20 bb: 21 %x.0 = phi i64 [ 0, %entry ], [ %t0, %bb2 ] 22 %t0 = add i64 %x.0, 1 23 %t1 = icmp slt i64 %x.0, %n 24 br i1 %t1, label %bb2, label %return 25 ; BEFORE: bb: 26 ; BEFORE: br i1 {{.*}}, label %bb2, label %return 27 ; AFTER-NOT: bb: 28 ; AFTER-NOT: br 29 30 bb2: 31 %t2 = icmp slt i64 %x.0, %m 32 br i1 %t1, label %bb, label %return 33 ; BEFORE: bb2: 34 ; BEFORE: br i1 {{.*}}, label %bb, label %return 35 ; AFTER-NOT: bb2: 36 ; AFTER-NOT: br 37 38 return: 39 ret void 40 ; CHECK: return: 41 ; CHECK-NEXT: ret void 42 } 43
