| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=loop-vectorize -mtriple=s390x-ibm-linux -mcpu=z13 -force-vector-width=2 -S %s | FileCheck %s |
| |
| ; Test case from PR44020. |
| |
| ; In func_21, %rec forms a first order recurrence and we predicate to avoid |
| ; scalar iteration overhead for a low trip count loop. Make sure we pick |
| ; the correct insertion point when fixing first order recurrences. |
| |
| @A = external dso_local global [5 x i32], align 4 |
| @B = external dso_local global [5 x i32], align 4 |
| |
| define void @func_21() { |
| ; CHECK-LABEL: @func_21( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] |
| ; CHECK: vector.ph: |
| ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE4:%.*]] ] |
| ; CHECK-NEXT: [[VECTOR_RECUR:%.*]] = phi <2 x i32> [ <i32 poison, i32 0>, [[VECTOR_PH]] ], [ [[TMP12:%.*]], [[PRED_STORE_CONTINUE4]] ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_STORE_CONTINUE4]] ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ule <2 x i64> [[VEC_IND]], splat (i64 4) |
| ; CHECK-NEXT: [[TMP3:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0 |
| ; CHECK-NEXT: br i1 [[TMP3]], label [[PRED_LOAD_IF:%.*]], label [[PRED_LOAD_CONTINUE:%.*]] |
| ; CHECK: pred.load.if: |
| ; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds [5 x i32], ptr @A, i64 0, i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP5:%.*]] = load i32, ptr [[TMP4]], align 4 |
| ; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x i32> poison, i32 [[TMP5]], i32 0 |
| ; CHECK-NEXT: br label [[PRED_LOAD_CONTINUE]] |
| ; CHECK: pred.load.continue: |
| ; CHECK-NEXT: [[TMP7:%.*]] = phi <2 x i32> [ poison, [[VECTOR_BODY]] ], [ [[TMP6]], [[PRED_LOAD_IF]] ] |
| ; CHECK-NEXT: [[TMP8:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1 |
| ; CHECK-NEXT: br i1 [[TMP8]], label [[PRED_LOAD_IF1:%.*]], label [[PRED_LOAD_CONTINUE2:%.*]] |
| ; CHECK: pred.load.if1: |
| ; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds [5 x i32], ptr @A, i64 0, i64 [[TMP1]] |
| ; CHECK-NEXT: [[TMP10:%.*]] = load i32, ptr [[TMP9]], align 4 |
| ; CHECK-NEXT: [[TMP11:%.*]] = insertelement <2 x i32> [[TMP7]], i32 [[TMP10]], i32 1 |
| ; CHECK-NEXT: br label [[PRED_LOAD_CONTINUE2]] |
| ; CHECK: pred.load.continue2: |
| ; CHECK-NEXT: [[TMP12]] = phi <2 x i32> [ [[TMP7]], [[PRED_LOAD_CONTINUE]] ], [ [[TMP11]], [[PRED_LOAD_IF1]] ] |
| ; CHECK-NEXT: [[TMP13:%.*]] = shufflevector <2 x i32> [[VECTOR_RECUR]], <2 x i32> [[TMP12]], <2 x i32> <i32 1, i32 2> |
| ; CHECK-NEXT: [[TMP14:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0 |
| ; CHECK-NEXT: br i1 [[TMP14]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]] |
| ; CHECK: pred.store.if: |
| ; CHECK-NEXT: [[TMP15:%.*]] = getelementptr inbounds [5 x i32], ptr @B, i64 0, i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP16:%.*]] = extractelement <2 x i32> [[TMP13]], i32 0 |
| ; CHECK-NEXT: store i32 [[TMP16]], ptr [[TMP15]], align 4 |
| ; CHECK-NEXT: br label [[PRED_STORE_CONTINUE]] |
| ; CHECK: pred.store.continue: |
| ; CHECK-NEXT: [[TMP17:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1 |
| ; CHECK-NEXT: br i1 [[TMP17]], label [[PRED_STORE_IF3:%.*]], label [[PRED_STORE_CONTINUE4]] |
| ; CHECK: pred.store.if3: |
| ; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds [5 x i32], ptr @B, i64 0, i64 [[TMP1]] |
| ; CHECK-NEXT: [[TMP19:%.*]] = extractelement <2 x i32> [[TMP13]], i32 1 |
| ; CHECK-NEXT: store i32 [[TMP19]], ptr [[TMP18]], align 4 |
| ; CHECK-NEXT: br label [[PRED_STORE_CONTINUE4]] |
| ; CHECK: pred.store.continue4: |
| ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2 |
| ; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], splat (i64 2) |
| ; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], 6 |
| ; CHECK-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] |
| ; CHECK: middle.block: |
| ; CHECK-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <2 x i32> [[TMP12]], i32 1 |
| ; CHECK-NEXT: br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]] |
| ; CHECK: scalar.ph: |
| ; CHECK-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i32 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 6, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ] |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[SCALAR_RECUR:%.*]] = phi i32 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[LV:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[A_PTR:%.*]] = getelementptr inbounds [5 x i32], ptr @A, i64 0, i64 [[INDVARS_IV]] |
| ; CHECK-NEXT: [[LV]] = load i32, ptr [[A_PTR]], align 4 |
| ; CHECK-NEXT: [[B_PTR:%.*]] = getelementptr inbounds [5 x i32], ptr @B, i64 0, i64 [[INDVARS_IV]] |
| ; CHECK-NEXT: store i32 [[SCALAR_RECUR]], ptr [[B_PTR]], align 4 |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 5 |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP3:![0-9]+]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop |
| |
| loop: ; preds = %loop, %entry |
| %rec = phi i32 [ 0, %entry], [ %lv, %loop ] |
| %indvars.iv = phi i64 [ 0, %entry], [ %indvars.iv.next, %loop ] |
| %A.ptr= getelementptr inbounds [5 x i32], ptr @A, i64 0, i64 %indvars.iv |
| %lv = load i32, ptr %A.ptr, align 4 |
| %B.ptr = getelementptr inbounds [5 x i32], ptr @B, i64 0, i64 %indvars.iv |
| store i32 %rec, ptr %B.ptr, align 4 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, 5 |
| br i1 %exitcond, label %exit, label %loop |
| |
| exit: ; preds = %loop |
| ret void |
| } |