1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 2; RUN: opt -p loop-vectorize -force-vector-width=2 -epilogue-vectorization-force-VF=2 -S %s | FileCheck %s 3 4target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64" 5 6; Test case for https://github.com/llvm/llvm-project/issues/122558. 7define void @vector_trip_count_0_as_btc_is_all_1(ptr %dst) #0 { 8; CHECK-LABEL: define void @vector_trip_count_0_as_btc_is_all_1( 9; CHECK-SAME: ptr [[DST:%.*]]) { 10; CHECK-NEXT: [[ENTRY:.*]]: 11; CHECK-NEXT: br label %[[LOOP:.*]] 12; CHECK: [[LOOP]]: 13; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ] 14; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1 15; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i32, ptr [[DST]], i32 [[IV]] 16; CHECK-NEXT: store i32 [[IV_NEXT]], ptr [[GEP]], align 4 17; CHECK-NEXT: [[EC:%.*]] = icmp eq i32 [[IV_NEXT]], 0 18; CHECK-NEXT: br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP]] 19; CHECK: [[EXIT]]: 20; CHECK-NEXT: ret void 21; 22entry: 23 br label %loop 24 25loop: 26 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ] 27 %iv.next = add i32 %iv, -1 28 %gep = getelementptr inbounds i32, ptr %dst, i32 %iv 29 store i32 %iv.next, ptr %gep, align 4 30 %ec = icmp eq i32 %iv.next, 0 31 br i1 %ec, label %exit, label %loop 32 33exit: 34 ret void 35} 36