1; RUN: opt -passes=loop-vectorize -force-vector-width=4 -enable-vplan-native-path -S %s | FileCheck %s 2 3; Vectorize explict marked outer loop using vplan native path. Inner loop 4; contains simple double add reduction. IR is compiled and modified by hand 5; from following C code: 6; void inner_loop_reduction(const ptr restrict in_a, const ptr restrict in_b, ptr restrict out) 7; { 8; #pragma clang loop vectorize(enable) 9; for (int i = 0; i < 1000; ++i) { 10; double a = in_a[i]; 11; double b = in_b[i]; 12; for (int j = 0; j < 10000; ++j) { 13; a = a + b; 14; } 15; out[i] = a; 16; } 17; } 18define void @inner_loop_reduction(ptr noalias nocapture readonly %a.in, ptr noalias nocapture readonly %b.in, ptr noalias nocapture %c.out) { 19; CHECK-LABEL: @inner_loop_reduction( 20 21; CHECK: vector.body: 22; CHECK-NEXT: %[[FOR1_INDEX:.*]] = phi i64 [ 0, %[[LABEL_PR:.*]] ], [ %{{.*}}, %[[LABEL_FOR1_LATCH:.*]] ] 23; CHECK: %[[VEC_INDEX:.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %[[LABEL_PR]] ], [ %{{.*}}, %[[LABEL_FOR1_LATCH]] ] 24; CHECK-NEXT: %[[A_PTR:.*]] = getelementptr inbounds double, ptr %a.in, <4 x i64> %[[VEC_INDEX]] 25; CHECK-NEXT: %[[MASKED_GATHER1:.*]] = call <4 x double> @llvm.masked.gather.v4f64.v4p0(<4 x ptr> %[[A_PTR]], i32 8, <4 x i1> splat (i1 true), <4 x double> poison) 26; CHECK-NEXT: %[[B_PTR:.*]] = getelementptr inbounds double, ptr %b.in, <4 x i64> %[[VEC_INDEX]] 27; CHECK-NEXT: %[[MASKED_GATHER2:.*]] = call <4 x double> @llvm.masked.gather.v4f64.v4p0(<4 x ptr> %[[B_PTR]], i32 8, <4 x i1> splat (i1 true), <4 x double> poison) 28; CHECK-NEXT: br label %[[FOR2_HEADER:.*]] 29 30; CHECK: [[FOR2_HEADER]]: 31; CHECK-NEXT: %[[FOR2_INDEX:.*]] = phi <4 x i32> [ zeroinitializer, %vector.body ], [ %[[FOR2_INDEX_NEXT:.*]], %[[FOR2_HEADER]] ] 32; CHECK-NEXT: %[[REDUCTION:.*]] = phi <4 x double> [ %[[MASKED_GATHER1]], %vector.body ], [ %[[REDUCTION_NEXT:.*]], %[[FOR2_HEADER]] ] 33; CHECK-NEXT: %[[REDUCTION_NEXT]] = fadd <4 x double> %[[MASKED_GATHER2]], %[[REDUCTION]] 34; CHECK-NEXT: %[[FOR2_INDEX_NEXT]] = add nuw nsw <4 x i32> %[[FOR2_INDEX]], splat (i32 1) 35; CHECK-NEXT: %[[VEC_PTR:.*]] = icmp eq <4 x i32> %[[FOR2_INDEX_NEXT]], splat (i32 10000) 36; CHECK-NEXT: %[[EXIT_COND:.*]] = extractelement <4 x i1> %[[VEC_PTR]], i32 0 37; CHECK-NEXT: br i1 %[[EXIT_COND]], label %[[FOR1_LATCH:.*]], label %{{.*}} 38 39; CHECK: [[FOR1_LATCH]]: 40; CHECK-NEXT: %[[REDUCTION:.*]] = phi <4 x double> [ %[[REDUCTION_NEXT]], %[[FOR2_HEADER]] ] 41; CHECK-NEXT: %[[C_PTR:.*]] = getelementptr inbounds double, ptr %c.out, <4 x i64> %[[VEC_INDEX]] 42; CHECK-NEXT: call void @llvm.masked.scatter.v4f64.v4p0(<4 x double> %[[REDUCTION]], <4 x ptr> %[[C_PTR]], i32 8, <4 x i1> splat (i1 true)) 43; CHECK-NEXT: %[[FOR1_INDEX_NEXT:.*]] = add nuw i64 %[[FOR1_INDEX]], 4 44; CHECK-NEXT: %{{.*}} = add <4 x i64> %[[VEC_INDEX]], splat (i64 4) 45; CHECK-NEXT: %[[EXIT_COND:.*]] = icmp eq i64 %[[FOR1_INDEX_NEXT]], 1000 46; CHECK-NEXT: br i1 %[[EXIT_COND]], label %{{.*}}, label %vector.body 47 48entry: 49 br label %for1.header 50 51for1.header: ; preds = %entry 52 %indvar1 = phi i64 [ 0, %entry ], [ %indvar11, %for1.latch ] 53 %a.ptr = getelementptr inbounds double, ptr %a.in, i64 %indvar1 54 %a = load double, ptr %a.ptr, align 8 55 %b.ptr = getelementptr inbounds double, ptr %b.in, i64 %indvar1 56 %b = load double, ptr %b.ptr, align 8 57 br label %for2.header 58 59for2.header: ; preds = %for1.header, %for2.header 60 %indvar2 = phi i32 [ 0, %for1.header ], [ %indvar21, %for2.header ] 61 %a.reduction = phi double [ %a, %for1.header ], [ %a.reduction1, %for2.header ] 62 %a.reduction1 = fadd double %b, %a.reduction 63 %indvar21 = add nuw nsw i32 %indvar2, 1 64 %for2.cond = icmp eq i32 %indvar21, 10000 65 br i1 %for2.cond, label %for1.latch, label %for2.header 66 67for1.latch: ; preds = %for2.header 68 %c.ptr = getelementptr inbounds double, ptr %c.out, i64 %indvar1 69 store double %a.reduction1, ptr %c.ptr, align 8 70 %indvar11 = add nuw nsw i64 %indvar1, 1 71 %for1.cond = icmp eq i64 %indvar11, 1000 72 br i1 %for1.cond, label %exit, label %for1.header, !llvm.loop !0 73 74exit: ; preds = %for1.latch 75 ret void 76} 77 78!0 = distinct !{!0, !1} 79!1 = !{!"llvm.loop.vectorize.enable", i1 true} 80