1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s
4 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
6 ; Make sure we vectorize this loop:
7 ; int foo(float *a, float *b, int n) {
8 ; for (int i=0; i<n; ++i)
12 define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp {
15 ; CHECK-NEXT: [[CMP6:%.*]] = icmp sgt i32 [[N:%.*]], 0, !dbg !4
16 ; CHECK-NEXT: br i1 [[CMP6]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]], !dbg !4
17 ; CHECK: for.body.preheader:
18 ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1, !dbg !9
19 ; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64, !dbg !9
20 ; CHECK-NEXT: [[TMP2:%.*]] = add nuw nsw i64 [[TMP1]], 1, !dbg !9
21 ; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP2]], 4, !dbg !9
22 ; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]], !dbg !9
23 ; CHECK: vector.memcheck:
24 ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[N]], -1, !dbg !9
25 ; CHECK-NEXT: [[TMP4:%.*]] = zext i32 [[TMP3]] to i64, !dbg !9
26 ; CHECK-NEXT: [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1, !dbg !9
27 ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr float, float* [[A:%.*]], i64 [[TMP5]], !dbg !9
28 ; CHECK-NEXT: [[SCEVGEP4:%.*]] = getelementptr float, float* [[B:%.*]], i64 [[TMP5]], !dbg !9
29 ; CHECK-NEXT: [[BOUND0:%.*]] = icmp ugt float* [[SCEVGEP4]], [[A]], !dbg !9
30 ; CHECK-NEXT: [[BOUND1:%.*]] = icmp ugt float* [[SCEVGEP]], [[B]], !dbg !9
31 ; CHECK-NEXT: [[MEMCHECK_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]], !dbg !9
32 ; CHECK-NEXT: br i1 [[MEMCHECK_CONFLICT]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]], !dbg !9
34 ; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[TMP2]], 8589934588, !dbg !9
35 ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]], !dbg !9
37 ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ], !dbg !9
38 ; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds float, float* [[B]], i64 [[INDEX]], !dbg !9
39 ; CHECK-NEXT: [[TMP8:%.*]] = bitcast float* [[TMP7]] to <4 x float>*, !dbg !9
40 ; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x float>, <4 x float>* [[TMP8]], align 4, !dbg !9, !alias.scope !10
41 ; CHECK-NEXT: [[TMP9:%.*]] = fmul <4 x float> [[WIDE_LOAD]], <float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00>, !dbg !9
42 ; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds float, float* [[A]], i64 [[INDEX]], !dbg !9
43 ; CHECK-NEXT: [[TMP11:%.*]] = bitcast float* [[TMP10]] to <4 x float>*, !dbg !9
44 ; CHECK-NEXT: store <4 x float> [[TMP9]], <4 x float>* [[TMP11]], align 4, !dbg !9, !alias.scope !13, !noalias !10
45 ; CHECK-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 4, !dbg !9
46 ; CHECK-NEXT: [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]], !dbg !9
47 ; CHECK-NEXT: br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !dbg !9, !llvm.loop !15
48 ; CHECK: middle.block:
49 ; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP2]], [[N_VEC]]
50 ; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]], !dbg !9
52 ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ], [ 0, [[VECTOR_MEMCHECK]] ]
53 ; CHECK-NEXT: br label [[FOR_BODY:%.*]], !dbg !9
55 ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], !dbg !9
56 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, float* [[B]], i64 [[INDVARS_IV]], !dbg !9
57 ; CHECK-NEXT: [[TMP13:%.*]] = load float, float* [[ARRAYIDX]], align 4, !dbg !9
58 ; CHECK-NEXT: [[MUL:%.*]] = fmul float [[TMP13]], 3.000000e+00, !dbg !9
59 ; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds float, float* [[A]], i64 [[INDVARS_IV]], !dbg !9
60 ; CHECK-NEXT: store float [[MUL]], float* [[ARRAYIDX2]], align 4, !dbg !9
61 ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1, !dbg !9
62 ; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32, !dbg !9
63 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]], !dbg !9
64 ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], !dbg !9, !llvm.loop !17
65 ; CHECK: for.end.loopexit:
66 ; CHECK-NEXT: br label [[FOR_END]], !dbg !18
68 ; CHECK-NEXT: ret i32 undef, !dbg !18
71 %cmp6 = icmp sgt i32 %n, 0, !dbg !6
72 br i1 %cmp6, label %for.body, label %for.end, !dbg !6
74 for.body: ; preds = %entry, %for.body
75 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ], !dbg !7
76 %arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv, !dbg !7
77 %0 = load float, float* %arrayidx, align 4, !dbg !7
78 %mul = fmul float %0, 3.000000e+00, !dbg !7
79 %arrayidx2 = getelementptr inbounds float, float* %a, i64 %indvars.iv, !dbg !7
80 store float %mul, float* %arrayidx2, align 4, !dbg !7
81 %indvars.iv.next = add i64 %indvars.iv, 1, !dbg !7
82 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !7
83 %exitcond = icmp eq i32 %lftr.wideiv, %n, !dbg !7
84 br i1 %exitcond, label %for.end, label %for.body, !dbg !7
86 for.end: ; preds = %for.body, %entry
87 ret i32 undef, !dbg !8
90 ; Make sure that we try to vectorize loops with a runtime check if the
91 ; dependency check fails.
93 ; CHECK-LABEL: test_runtime_check
95 define void @test_runtime_check(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) {
100 %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
101 %ind.sum = add i64 %iv, %offset
102 %arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum
103 %l1 = load float, float* %arr.idx, align 4
104 %ind.sum2 = add i64 %iv, %offset2
105 %arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2
106 %l2 = load float, float* %arr.idx2, align 4
107 %m = fmul fast float %b, %l2
108 %ad = fadd fast float %l1, %m
109 store float %ad, float* %arr.idx, align 4
110 %iv.next = add nuw nsw i64 %iv, 1
111 %exitcond = icmp eq i64 %iv.next, %n
112 br i1 %exitcond, label %loopexit, label %for.body
118 ; Check we do not generate runtime checks if we found a known dependence preventing
119 ; vectorization. In this case, it is a read of c[i-1] followed by a write of c[i].
120 ; The runtime checks would always fail.
122 ; void test_runtime_check2(float *a, float b, unsigned offset, unsigned offset2, unsigned n, float *c) {
123 ; for (unsigned i = 1; i < n; i++) {
124 ; a[i+o1] += a[i+o2] + b;
129 ; CHECK-LABEL: test_runtime_check2
130 ; CHECK-NOT: <4 x float>
131 define void @test_runtime_check2(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n, float* %c) {
136 %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
137 %ind.sum = add i64 %iv, %offset
138 %arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum
139 %l1 = load float, float* %arr.idx, align 4
140 %ind.sum2 = add i64 %iv, %offset2
141 %arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2
142 %l2 = load float, float* %arr.idx2, align 4
143 %m = fmul fast float %b, %l2
144 %ad = fadd fast float %l1, %m
145 store float %ad, float* %arr.idx, align 4
146 %c.ind = add i64 %iv, -1
147 %c.idx = getelementptr inbounds float, float* %c, i64 %c.ind
148 %lc = load float, float* %c.idx, align 4
149 %vc = fadd float %lc, 1.0
150 %c.idx2 = getelementptr inbounds float, float* %c, i64 %iv
151 store float %vc, float* %c.idx2
152 %iv.next = add nuw nsw i64 %iv, 1
153 %exitcond = icmp eq i64 %iv.next, %n
154 br i1 %exitcond, label %loopexit, label %for.body
160 ; CHECK: !9 = !DILocation(line: 101, column: 1, scope: !{{.*}})
162 !llvm.module.flags = !{!0, !1}
164 !0 = !{i32 2, !"Dwarf Version", i32 4}
165 !1 = !{i32 2, !"Debug Info Version", i32 3}
168 !3 = !DISubroutineType(types: !2)
169 !4 = !DIFile(filename: "test.cpp", directory: "/tmp")
170 !5 = distinct !DISubprogram(name: "foo", scope: !4, file: !4, line: 99, type: !3, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, unit: !9, retainedNodes: !2)
171 !6 = !DILocation(line: 100, column: 1, scope: !5)
172 !7 = !DILocation(line: 101, column: 1, scope: !5)
173 !8 = !DILocation(line: 102, column: 1, scope: !5)
174 !9 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
176 isOptimized: true, flags: "-O2",
177 splitDebugFilename: "abc.debug", emissionKind: 2)
178 !10 = !DIFile(filename: "path/to/file", directory: "/path/to/dir")
179 !11 = !{i32 2, !"Debug Info Version", i32 3}