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=4 -force-vector-interleave=2 -S %s | FileCheck %s 3 4; Test case for https://github.com/llvm/llvm-project/issues/118850. 5define void @i65_induction_with_negative_step(ptr %dst) { 6; CHECK-LABEL: define void @i65_induction_with_negative_step( 7; CHECK-SAME: ptr [[DST:%.*]]) { 8; CHECK-NEXT: [[ENTRY:.*]]: 9; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]] 10; CHECK: [[VECTOR_PH]]: 11; CHECK-NEXT: br label %[[VECTOR_BODY:.*]] 12; CHECK: [[VECTOR_BODY]]: 13; CHECK-NEXT: [[INDEX:%.*]] = phi i65 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ] 14; CHECK-NEXT: [[VECTOR_RECUR:%.*]] = phi <4 x i64> [ <i64 poison, i64 poison, i64 poison, i64 0>, %[[VECTOR_PH]] ], [ [[STEP_ADD:%.*]], %[[VECTOR_BODY]] ] 15; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 -1, i64 -2, i64 -3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ] 16; CHECK-NEXT: [[STEP_ADD]] = add <4 x i64> [[VEC_IND]], splat (i64 -4) 17; CHECK-NEXT: [[OFFSET_IDX:%.*]] = sub i65 0, [[INDEX]] 18; CHECK-NEXT: [[TMP0:%.*]] = trunc i65 [[OFFSET_IDX]] to i64 19; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[TMP0]], 0 20; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <4 x i64> [[VECTOR_RECUR]], <4 x i64> [[VEC_IND]], <4 x i32> <i32 3, i32 4, i32 5, i32 6> 21; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <4 x i64> [[VEC_IND]], <4 x i64> [[STEP_ADD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6> 22; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[TMP1]] 23; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[TMP4]], i32 0 24; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i64, ptr [[TMP5]], i32 -3 25; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i64, ptr [[TMP4]], i32 -4 26; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[TMP7]], i32 -3 27; CHECK-NEXT: [[REVERSE:%.*]] = shufflevector <4 x i64> [[TMP2]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 28; CHECK-NEXT: store <4 x i64> [[REVERSE]], ptr [[TMP6]], align 8 29; CHECK-NEXT: [[REVERSE1:%.*]] = shufflevector <4 x i64> [[TMP3]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 30; CHECK-NEXT: store <4 x i64> [[REVERSE1]], ptr [[TMP8]], align 8 31; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i65 [[INDEX]], 8 32; CHECK-NEXT: [[VEC_IND_NEXT]] = add <4 x i64> [[STEP_ADD]], splat (i64 -4) 33; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i65 [[INDEX_NEXT]], 1000 34; CHECK-NEXT: br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] 35; CHECK: [[MIDDLE_BLOCK]]: 36; CHECK-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i64> [[STEP_ADD]], i32 3 37; CHECK-NEXT: br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]] 38; CHECK: [[SCALAR_PH]]: 39; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 1000, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] 40; CHECK-NEXT: [[BC_RESUME_VAL2:%.*]] = phi i65 [ -1000, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] 41; CHECK-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] 42; CHECK-NEXT: br label %[[LOOP:.*]] 43; CHECK: [[LOOP]]: 44; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ] 45; CHECK-NEXT: [[IV_I65:%.*]] = phi i65 [ [[BC_RESUME_VAL2]], %[[SCALAR_PH]] ], [ [[IV_I65_NEXT:%.*]], %[[LOOP]] ] 46; CHECK-NEXT: [[FOR:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], %[[SCALAR_PH]] ], [ [[TRUNC:%.*]], %[[LOOP]] ] 47; CHECK-NEXT: [[TRUNC]] = trunc i65 [[IV_I65]] to i64 48; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[TRUNC]] 49; CHECK-NEXT: store i64 [[FOR]], ptr [[GEP]], align 8 50; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 51; CHECK-NEXT: [[ICMP:%.*]] = icmp eq i64 [[IV_NEXT]], 1000 52; CHECK-NEXT: [[IV_I65_NEXT]] = add i65 [[IV_I65]], -1 53; CHECK-NEXT: br i1 [[ICMP]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP3:![0-9]+]] 54; CHECK: [[EXIT]]: 55; CHECK-NEXT: ret void 56; 57entry: 58 br label %loop 59 60loop: 61 %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] 62 %iv.i65 = phi i65 [ 0, %entry ], [ %iv.i65.next, %loop ] 63 %for = phi i64 [ 0, %entry ], [ %trunc, %loop ] 64 %trunc = trunc i65 %iv.i65 to i64 65 %gep = getelementptr inbounds i64, ptr %dst, i64 %trunc 66 store i64 %for, ptr %gep, align 8 67 %iv.next = add i64 %iv, 1 68 %icmp = icmp eq i64 %iv.next, 1000 69 %iv.i65.next = add i65 %iv.i65, -1 70 br i1 %icmp, label %exit, label %loop 71 72exit: 73 ret void 74} 75;. 76; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]} 77; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1} 78; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"} 79; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]} 80;. 81