xref: /llvm-project/llvm/test/Transforms/LoopVectorize/X86/induction-step.ll (revision df4a615c988f3ae56f7e68a7df86acb60f16493a) 
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -passes=loop-vectorize -force-vector-width=4 -S %s | FileCheck %s
3
4target triple = "x86_64-unknown-linux-gnu"
5
6define i16 @wide_add_induction_step_live_in(ptr %dst, i64 %N, i16 %off) {
7; CHECK-LABEL: @wide_add_induction_step_live_in(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    [[O_1:%.*]] = add i16 [[OFF:%.*]], 2
10; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 8
11; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
12; CHECK:       vector.ph:
13; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], 8
14; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
15; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i64 [[N_VEC]] to i16
16; CHECK-NEXT:    [[TMP0:%.*]] = mul i16 [[DOTCAST]], [[O_1]]
17; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i16> poison, i16 [[O_1]], i64 0
18; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i16> [[BROADCAST_SPLATINSERT]], <4 x i16> poison, <4 x i32> zeroinitializer
19; CHECK-NEXT:    [[TMP1:%.*]] = mul <4 x i16> splat (i16 4), [[BROADCAST_SPLAT]]
20; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <4 x i16> poison, i16 [[O_1]], i64 0
21; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <4 x i16> [[DOTSPLATINSERT]], <4 x i16> poison, <4 x i32> zeroinitializer
22; CHECK-NEXT:    [[TMP2:%.*]] = mul <4 x i16> <i16 0, i16 1, i16 2, i16 3>, [[DOTSPLAT]]
23; CHECK-NEXT:    [[INDUCTION:%.*]] = add <4 x i16> zeroinitializer, [[TMP2]]
24; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
25; CHECK:       vector.body:
26; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
27; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i16> [ [[INDUCTION]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
28; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <4 x i16> [[VEC_IND]], [[TMP1]]
29; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 0
30; CHECK-NEXT:    [[TMP4:%.*]] = add <4 x i16> [[VEC_IND]], [[BROADCAST_SPLAT]]
31; CHECK-NEXT:    [[TMP9:%.*]] = add <4 x i16> [[STEP_ADD]], [[BROADCAST_SPLAT]]
32; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[DST:%.*]], i64 [[TMP3]]
33; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0
34; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 4
35; CHECK-NEXT:    store <4 x i16> [[TMP4]], ptr [[TMP6]], align 2
36; CHECK-NEXT:    store <4 x i16> [[TMP9]], ptr [[TMP8]], align 2
37; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
38; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i16> [[STEP_ADD]], [[TMP1]]
39; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
40; CHECK-NEXT:    br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
41; CHECK:       middle.block:
42; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
43; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
44; CHECK:       scalar.ph:
45; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
46; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i16 [ [[TMP0]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
47; CHECK-NEXT:    br label [[LOOP:%.*]]
48; CHECK:       loop:
49; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
50; CHECK-NEXT:    [[IV_2:%.*]] = phi i16 [ [[BC_RESUME_VAL1]], [[SCALAR_PH]] ], [ [[ADD:%.*]], [[LOOP]] ]
51; CHECK-NEXT:    [[ADD]] = add i16 [[IV_2]], [[O_1]]
52; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr inbounds i16, ptr [[DST]], i64 [[IV]]
53; CHECK-NEXT:    store i16 [[ADD]], ptr [[GEP_DST]], align 2
54; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
55; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
56; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP3:![0-9]+]]
57; CHECK:       exit:
58; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi i16 [ [[ADD]], [[LOOP]] ], [ [[TMP0]], [[MIDDLE_BLOCK]] ]
59; CHECK-NEXT:    ret i16 [[ADD_LCSSA]]
60;
61entry:
62  %o.1 = add i16 %off, 2
63  br label %loop
64
65loop:
66  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
67  %iv.2 = phi i16 [ 0, %entry ], [ %add, %loop ]
68  %add = add i16 %iv.2, %o.1
69  %gep.dst = getelementptr inbounds i16, ptr %dst, i64 %iv
70  store i16 %add, ptr %gep.dst, align 2
71  %iv.next = add nuw nsw i64 %iv, 1
72  %ec = icmp eq i64 %iv.next, %N
73  br i1 %ec , label %exit, label %loop
74
75exit:
76  ret i16 %add
77}
78
79define i16 @wide_sub_induction_step_live_in(ptr %dst, i64 %N, i16 %off) {
80; CHECK-LABEL: @wide_sub_induction_step_live_in(
81; CHECK-NEXT:  entry:
82; CHECK-NEXT:    [[O_1:%.*]] = add i16 [[OFF:%.*]], 2
83; CHECK-NEXT:    [[TMP0:%.*]] = sub i16 -2, [[OFF]]
84; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 8
85; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
86; CHECK:       vector.ph:
87; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], 8
88; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
89; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i64 [[N_VEC]] to i16
90; CHECK-NEXT:    [[TMP1:%.*]] = mul i16 [[DOTCAST]], [[TMP0]]
91; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i16> poison, i16 [[TMP0]], i64 0
92; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i16> [[BROADCAST_SPLATINSERT]], <4 x i16> poison, <4 x i32> zeroinitializer
93; CHECK-NEXT:    [[TMP2:%.*]] = mul <4 x i16> splat (i16 4), [[BROADCAST_SPLAT]]
94; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <4 x i16> poison, i16 [[TMP0]], i64 0
95; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <4 x i16> [[DOTSPLATINSERT]], <4 x i16> poison, <4 x i32> zeroinitializer
96; CHECK-NEXT:    [[TMP3:%.*]] = mul <4 x i16> <i16 0, i16 1, i16 2, i16 3>, [[DOTSPLAT]]
97; CHECK-NEXT:    [[INDUCTION:%.*]] = add <4 x i16> zeroinitializer, [[TMP3]]
98; CHECK-NEXT:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i16> poison, i16 [[O_1]], i64 0
99; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i16> [[BROADCAST_SPLATINSERT1]], <4 x i16> poison, <4 x i32> zeroinitializer
100; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
101; CHECK:       vector.body:
102; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
103; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i16> [ [[INDUCTION]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
104; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <4 x i16> [[VEC_IND]], [[TMP2]]
105; CHECK-NEXT:    [[TMP4:%.*]] = add i64 [[INDEX]], 0
106; CHECK-NEXT:    [[TMP5:%.*]] = sub <4 x i16> [[VEC_IND]], [[BROADCAST_SPLAT2]]
107; CHECK-NEXT:    [[TMP10:%.*]] = sub <4 x i16> [[STEP_ADD]], [[BROADCAST_SPLAT2]]
108; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[DST:%.*]], i64 [[TMP4]]
109; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i16, ptr [[TMP6]], i32 0
110; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i16, ptr [[TMP6]], i32 4
111; CHECK-NEXT:    store <4 x i16> [[TMP5]], ptr [[TMP7]], align 2
112; CHECK-NEXT:    store <4 x i16> [[TMP10]], ptr [[TMP9]], align 2
113; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
114; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i16> [[STEP_ADD]], [[TMP2]]
115; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
116; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
117; CHECK:       middle.block:
118; CHECK-NEXT:    [[TMP11:%.*]] = extractelement <4 x i16> [[TMP10]], i32 3
119; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
120; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
121; CHECK:       scalar.ph:
122; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
123; CHECK-NEXT:    [[BC_RESUME_VAL3:%.*]] = phi i16 [ [[TMP1]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
124; CHECK-NEXT:    br label [[LOOP:%.*]]
125; CHECK:       loop:
126; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
127; CHECK-NEXT:    [[IV_2:%.*]] = phi i16 [ [[BC_RESUME_VAL3]], [[SCALAR_PH]] ], [ [[SUB:%.*]], [[LOOP]] ]
128; CHECK-NEXT:    [[SUB]] = sub i16 [[IV_2]], [[O_1]]
129; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr inbounds i16, ptr [[DST]], i64 [[IV]]
130; CHECK-NEXT:    store i16 [[SUB]], ptr [[GEP_DST]], align 2
131; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
132; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
133; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP5:![0-9]+]]
134; CHECK:       exit:
135; CHECK-NEXT:    [[SUB_LCSSA:%.*]] = phi i16 [ [[SUB]], [[LOOP]] ], [ [[TMP11]], [[MIDDLE_BLOCK]] ]
136; CHECK-NEXT:    ret i16 [[SUB_LCSSA]]
137;
138entry:
139  %o.1 = add i16 %off, 2
140  br label %loop
141
142loop:
143  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
144  %iv.2 = phi i16 [ 0, %entry ], [ %sub, %loop ]
145  %sub = sub i16 %iv.2, %o.1
146  %gep.dst = getelementptr inbounds i16, ptr %dst, i64 %iv
147  store i16 %sub, ptr %gep.dst, align 2
148  %iv.next = add nuw nsw i64 %iv, 1
149  %ec = icmp eq i64 %iv.next, %N
150  br i1 %ec , label %exit, label %loop
151
152exit:
153  ret i16 %sub
154}
155