1; RUN: opt < %s -loop-vectorize -S -pass-remarks-missed='loop-vectorize' -pass-remarks-analysis='loop-vectorize' 2>&1 | FileCheck %s
2
3; C/C++ code for tests
4; void test(int *A, int Length) {
5; #pragma clang loop vectorize(enable) interleave(enable)
6;   for (int i = 0; i < Length; i++) {
7;     A[i] = i;
8;     if (A[i] > Length)
9;       break;
10;   }
11; }
12
13; void test_disabled(int *A, int Length) {
14; #pragma clang loop vectorize(disable) interleave(disable)
15;   for (int i = 0; i < Length; i++)
16;     A[i] = i;
17; }
18
19; void test_array_bounds(int *A, int *B, int Length) {
20; #pragma clang loop vectorize(enable)
21;   for (int i = 0; i < Length; i++)
22;     A[i] = A[B[i]];
23; }
24
25; File, line, and column should match those specified in the metadata
26; CHECK: remark: source.cpp:4:5: loop not vectorized: could not determine number of loop iterations
27; CHECK: remark: source.cpp:4:5: loop not vectorized: use -Rpass-analysis=loop-vectorize for more info
28; CHECK: remark: source.cpp:13:5: loop not vectorized: vectorization and interleaving are explicitly disabled, or vectorize width and interleave count are both set to 1
29; CHECK: remark: source.cpp:19:5: loop not vectorized: cannot identify array bounds
30; CHECK: remark: source.cpp:19:5: loop not vectorized: use -Rpass-analysis=loop-vectorize for more info
31; CHECK: warning: source.cpp:19:5: loop not vectorized: failed explicitly specified loop vectorization
32
33; CHECK: _Z4testPii
34; CHECK-NOT: x i32>
35; CHECK: ret
36
37; CHECK: _Z13test_disabledPii
38; CHECK-NOT: x i32>
39; CHECK: ret
40
41; CHECK: _Z17test_array_boundsPiS_i
42; CHECK-NOT: x i32>
43; CHECK: ret
44
45target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
46
47; Function Attrs: nounwind optsize ssp uwtable
48define void @_Z4testPii(i32* nocapture %A, i32 %Length) #0 !dbg !4 {
49entry:
50  %cmp10 = icmp sgt i32 %Length, 0, !dbg !12
51  br i1 %cmp10, label %for.body, label %for.end, !dbg !12, !llvm.loop !14
52
53for.body:                                         ; preds = %entry, %for.body
54  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
55  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !16
56  %0 = trunc i64 %indvars.iv to i32, !dbg !16
57  %ld = load i32, i32* %arrayidx, align 4
58  store i32 %0, i32* %arrayidx, align 4, !dbg !16, !tbaa !18
59  %cmp3 = icmp sle i32 %ld, %Length, !dbg !22
60  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !12
61  %1 = trunc i64 %indvars.iv.next to i32
62  %cmp = icmp slt i32 %1, %Length, !dbg !12
63  %or.cond = and i1 %cmp3, %cmp, !dbg !22
64  br i1 %or.cond, label %for.body, label %for.end, !dbg !22
65
66for.end:                                          ; preds = %for.body, %entry
67  ret void, !dbg !24
68}
69
70; Function Attrs: nounwind optsize ssp uwtable
71define void @_Z13test_disabledPii(i32* nocapture %A, i32 %Length) #0 !dbg !7 {
72entry:
73  %cmp4 = icmp sgt i32 %Length, 0, !dbg !25
74  br i1 %cmp4, label %for.body, label %for.end, !dbg !25, !llvm.loop !27
75
76for.body:                                         ; preds = %entry, %for.body
77  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
78  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !30
79  %0 = trunc i64 %indvars.iv to i32, !dbg !30
80  store i32 %0, i32* %arrayidx, align 4, !dbg !30, !tbaa !18
81  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !25
82  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !25
83  %exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !25
84  br i1 %exitcond, label %for.end, label %for.body, !dbg !25, !llvm.loop !27
85
86for.end:                                          ; preds = %for.body, %entry
87  ret void, !dbg !31
88}
89
90; Function Attrs: nounwind optsize ssp uwtable
91define void @_Z17test_array_boundsPiS_i(i32* nocapture %A, i32* nocapture readonly %B, i32 %Length) #0 !dbg !8 {
92entry:
93  %cmp9 = icmp sgt i32 %Length, 0, !dbg !32
94  br i1 %cmp9, label %for.body.preheader, label %for.end, !dbg !32, !llvm.loop !34
95
96for.body.preheader:                               ; preds = %entry
97  br label %for.body, !dbg !35
98
99for.body:                                         ; preds = %for.body.preheader, %for.body
100  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
101  %arrayidx = getelementptr inbounds i32, i32* %B, i64 %indvars.iv, !dbg !35
102  %0 = load i32, i32* %arrayidx, align 4, !dbg !35, !tbaa !18
103  %idxprom1 = sext i32 %0 to i64, !dbg !35
104  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %idxprom1, !dbg !35
105  %1 = load i32, i32* %arrayidx2, align 4, !dbg !35, !tbaa !18
106  %arrayidx4 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !35
107  store i32 %1, i32* %arrayidx4, align 4, !dbg !35, !tbaa !18
108  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !32
109  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !32
110  %exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !32
111  br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !32, !llvm.loop !34
112
113for.end.loopexit:                                 ; preds = %for.body
114  br label %for.end
115
116for.end:                                          ; preds = %for.end.loopexit, %entry
117  ret void, !dbg !36
118}
119
120attributes #0 = { nounwind }
121
122!llvm.dbg.cu = !{!0}
123!llvm.module.flags = !{!9, !10}
124!llvm.ident = !{!11}
125
126!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0", isOptimized: true, runtimeVersion: 6, emissionKind: LineTablesOnly, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
127!1 = !DIFile(filename: "source.cpp", directory: ".")
128!2 = !{}
129!4 = distinct !DISubprogram(name: "test", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
130!5 = !DIFile(filename: "source.cpp", directory: ".")
131!6 = !DISubroutineType(types: !2)
132!7 = distinct !DISubprogram(name: "test_disabled", line: 10, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 10, file: !1, scope: !5, type: !6, variables: !2)
133!8 = distinct !DISubprogram(name: "test_array_bounds", line: 16, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 16, file: !1, scope: !5, type: !6, variables: !2)
134!9 = !{i32 2, !"Dwarf Version", i32 2}
135!10 = !{i32 2, !"Debug Info Version", i32 3}
136!11 = !{!"clang version 3.5.0"}
137!12 = !DILocation(line: 3, column: 8, scope: !13)
138!13 = distinct !DILexicalBlock(line: 3, column: 3, file: !1, scope: !4)
139!14 = !{!14, !15, !15}
140!15 = !{!"llvm.loop.vectorize.enable", i1 true}
141!16 = !DILocation(line: 4, column: 5, scope: !17)
142!17 = distinct !DILexicalBlock(line: 3, column: 36, file: !1, scope: !13)
143!18 = !{!19, !19, i64 0}
144!19 = !{!"int", !20, i64 0}
145!20 = !{!"omnipotent char", !21, i64 0}
146!21 = !{!"Simple C/C++ TBAA"}
147!22 = !DILocation(line: 5, column: 9, scope: !23)
148!23 = distinct !DILexicalBlock(line: 5, column: 9, file: !1, scope: !17)
149!24 = !DILocation(line: 8, column: 1, scope: !4)
150!25 = !DILocation(line: 12, column: 8, scope: !26)
151!26 = distinct !DILexicalBlock(line: 12, column: 3, file: !1, scope: !7)
152!27 = !{!27, !28, !29}
153!28 = !{!"llvm.loop.interleave.count", i32 1}
154!29 = !{!"llvm.loop.vectorize.width", i32 1}
155!30 = !DILocation(line: 13, column: 5, scope: !26)
156!31 = !DILocation(line: 14, column: 1, scope: !7)
157!32 = !DILocation(line: 18, column: 8, scope: !33)
158!33 = distinct !DILexicalBlock(line: 18, column: 3, file: !1, scope: !8)
159!34 = !{!34, !15}
160!35 = !DILocation(line: 19, column: 5, scope: !33)
161!36 = !DILocation(line: 20, column: 1, scope: !8)
162