1 ; RUN: opt -S < %s -loop-vectorize -force-vector-interleave=2 -force-vector-width=4 | FileCheck %s
2 ; RUN: opt -S < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 | FileCheck %s --check-prefix=FORCE-VEC
4 target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
5 target triple = "aarch64--linux-gnueabi"
7 ; Test integer induction variable of step 2:
8 ; for (int i = 0; i < 1024; i+=2) {
13 ; CHECK-LABEL: @ind_plus2(
14 ; CHECK: load <4 x i32>, <4 x i32>*
15 ; CHECK: load <4 x i32>, <4 x i32>*
16 ; CHECK: mul nsw <4 x i32>
17 ; CHECK: mul nsw <4 x i32>
18 ; CHECK: add nsw <4 x i32>
19 ; CHECK: add nsw <4 x i32>
20 ; CHECK: %index.next = add i64 %index, 8
21 ; CHECK: icmp eq i64 %index.next, 512
23 ; FORCE-VEC-LABEL: @ind_plus2(
24 ; FORCE-VEC: %wide.load = load <2 x i32>, <2 x i32>*
25 ; FORCE-VEC: mul nsw <2 x i32>
26 ; FORCE-VEC: add nsw <2 x i32>
27 ; FORCE-VEC: %index.next = add i64 %index, 2
28 ; FORCE-VEC: icmp eq i64 %index.next, 512
29 define i32 @ind_plus2(i32* %A) {
33 for.body: ; preds = %entry, %for.body
34 %A.addr = phi i32* [ %A, %entry ], [ %inc.ptr, %for.body ]
35 %i = phi i32 [ 0, %entry ], [ %add1, %for.body ]
36 %sum = phi i32 [ 0, %entry ], [ %add, %for.body ]
37 %inc.ptr = getelementptr inbounds i32, i32* %A.addr, i64 1
38 %0 = load i32, i32* %A.addr, align 4
39 %mul = mul nsw i32 %0, %i
40 %add = add nsw i32 %mul, %sum
41 %add1 = add nsw i32 %i, 2
42 %cmp = icmp slt i32 %add1, 1024
43 br i1 %cmp, label %for.body, label %for.end
45 for.end: ; preds = %for.body
46 %add.lcssa = phi i32 [ %add, %for.body ]
51 ; Test integer induction variable of step -2:
52 ; for (int i = 1024; i > 0; i-=2) {
57 ; CHECK-LABEL: @ind_minus2(
58 ; CHECK: load <4 x i32>, <4 x i32>*
59 ; CHECK: load <4 x i32>, <4 x i32>*
60 ; CHECK: mul nsw <4 x i32>
61 ; CHECK: mul nsw <4 x i32>
62 ; CHECK: add nsw <4 x i32>
63 ; CHECK: add nsw <4 x i32>
64 ; CHECK: %index.next = add i64 %index, 8
65 ; CHECK: icmp eq i64 %index.next, 512
67 ; FORCE-VEC-LABEL: @ind_minus2(
68 ; FORCE-VEC: %wide.load = load <2 x i32>, <2 x i32>*
69 ; FORCE-VEC: mul nsw <2 x i32>
70 ; FORCE-VEC: add nsw <2 x i32>
71 ; FORCE-VEC: %index.next = add i64 %index, 2
72 ; FORCE-VEC: icmp eq i64 %index.next, 512
73 define i32 @ind_minus2(i32* %A) {
77 for.body: ; preds = %entry, %for.body
78 %A.addr = phi i32* [ %A, %entry ], [ %inc.ptr, %for.body ]
79 %i = phi i32 [ 1024, %entry ], [ %sub, %for.body ]
80 %sum = phi i32 [ 0, %entry ], [ %add, %for.body ]
81 %inc.ptr = getelementptr inbounds i32, i32* %A.addr, i64 1
82 %0 = load i32, i32* %A.addr, align 4
83 %mul = mul nsw i32 %0, %i
84 %add = add nsw i32 %mul, %sum
85 %sub = add nsw i32 %i, -2
86 %cmp = icmp sgt i32 %i, 2
87 br i1 %cmp, label %for.body, label %for.end
89 for.end: ; preds = %for.body
90 %add.lcssa = phi i32 [ %add, %for.body ]
95 ; Test pointer induction variable of step 2. As currently we don't support
96 ; masked load/store, vectorization is possible but not beneficial. If loop
97 ; vectorization is not enforced, LV will only do interleave.
98 ; for (int i = 0; i < 1024; i++) {
101 ; sum += tmp0 * tmp1;
104 ; CHECK-LABEL: @ptr_ind_plus2(
105 ; CHECK: %[[V0:.*]] = load <8 x i32>
106 ; CHECK: %[[V1:.*]] = load <8 x i32>
107 ; CHECK: shufflevector <8 x i32> %[[V0]], <8 x i32> undef, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
108 ; CHECK: shufflevector <8 x i32> %[[V1]], <8 x i32> undef, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
109 ; CHECK: shufflevector <8 x i32> %[[V0]], <8 x i32> undef, <4 x i32> <i32 1, i32 3, i32 5, i32 7>
110 ; CHECK: shufflevector <8 x i32> %[[V1]], <8 x i32> undef, <4 x i32> <i32 1, i32 3, i32 5, i32 7>
111 ; CHECK: mul nsw <4 x i32>
112 ; CHECK: mul nsw <4 x i32>
113 ; CHECK: add nsw <4 x i32>
114 ; CHECK: add nsw <4 x i32>
115 ; CHECK: %index.next = add i64 %index, 8
116 ; CHECK: icmp eq i64 %index.next, 1024
118 ; FORCE-VEC-LABEL: @ptr_ind_plus2(
119 ; FORCE-VEC: %[[V:.*]] = load <4 x i32>
120 ; FORCE-VEC: shufflevector <4 x i32> %[[V]], <4 x i32> undef, <2 x i32> <i32 0, i32 2>
121 ; FORCE-VEC: shufflevector <4 x i32> %[[V]], <4 x i32> undef, <2 x i32> <i32 1, i32 3>
122 ; FORCE-VEC: mul nsw <2 x i32>
123 ; FORCE-VEC: add nsw <2 x i32>
124 ; FORCE-VEC: %index.next = add i64 %index, 2
125 ; FORCE-VEC: icmp eq i64 %index.next, 1024
126 define i32 @ptr_ind_plus2(i32* %A) {
130 for.body: ; preds = %for.body, %entry
131 %A.addr = phi i32* [ %A, %entry ], [ %inc.ptr1, %for.body ]
132 %sum = phi i32 [ 0, %entry ], [ %add, %for.body ]
133 %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
134 %inc.ptr = getelementptr inbounds i32, i32* %A.addr, i64 1
135 %0 = load i32, i32* %A.addr, align 4
136 %inc.ptr1 = getelementptr inbounds i32, i32* %A.addr, i64 2
137 %1 = load i32, i32* %inc.ptr, align 4
138 %mul = mul nsw i32 %1, %0
139 %add = add nsw i32 %mul, %sum
140 %inc = add nsw i32 %i, 1
141 %exitcond = icmp eq i32 %inc, 1024
142 br i1 %exitcond, label %for.end, label %for.body
144 for.end: ; preds = %for.body
145 %add.lcssa = phi i32 [ %add, %for.body ]