1; RUN: llvm-reduce --abort-on-invalid-reduction --delta-passes=basic-blocks --test FileCheck --test-arg --check-prefixes=CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t 2; RUN: FileCheck %s < %t 3 4 5; Check that no invalid reduction is produced. Remaining unreachable 6; blocks can leave instructions that dominate uses. When %bb3 was made 7; unreachable it produced this verifier error: 8; Instruction does not dominate all uses! 9; %i4 = icmp eq i32 0, 0 10; %i6 = select i1 %i4, i1 false, i1 false 11 12 13; CHECK: define void @func() { 14; CHECK-NEXT: bb: 15; CHECK-NEXT: br label %bb1 16 17; CHECK: bb1: 18; CHECK-NEXT: label %bb3 19 20; CHECK: bb2: 21; CHECK-NEXT: br i1 false, label %bb1, label %bb2 22 23; CHECK: bb3: 24; CHECK-NEXT: %i = phi i32 [ 0, %bb1 ] 25; CHECK: %i4 = icmp eq i32 0, 0 26; CHECK-NEXT: br label %bb5 27 28; CHECK: bb5: 29; CHECK-NEXT: %i6 = select i1 %i4, i1 false, i1 false 30; CHECK-NEXT: store i32 0 31; CHECK-NEXT: ret void 32define void @func() { 33bb: 34 br label %bb1 35 36bb1: ; preds = %bb2, %bb 37 br label %bb3 38 39bb2: ; preds = %bb2 40 br i1 false, label %bb1, label %bb2 41 42bb3: ; preds = %bb1 43 %i = phi i32 [ 0, %bb1 ] 44 %i4 = icmp eq i32 0, 0 45 br label %bb5 46 47bb5: ; preds = %bb3 48 %i6 = select i1 %i4, i1 false, i1 false 49 ; CHECK-INTERESTINGNESS: store 50 store i32 0, ptr undef, align 4 51 ret void 52} 53