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1; RUN: opt -loop-distribute -S < %s 2>&1 \
2; RUN:     | FileCheck %s --check-prefix=ALWAYS --check-prefix=NO_REMARKS
3; RUN: opt -loop-distribute -S -pass-remarks-missed=loop-distribute < %s 2>&1 \
4; RUN:     | FileCheck %s --check-prefix=ALWAYS --check-prefix=MISSED_REMARKS
5; RUN: opt -loop-distribute -S -pass-remarks-analysis=loop-distribute < %s 2>&1 \
6; RUN:     | FileCheck %s --check-prefix=ALWAYS --check-prefix=ANALYSIS_REMARKS
7; RUN: opt -loop-distribute -S -pass-remarks=loop-distribute < %s 2>&1 \
8; RUN:     | FileCheck %s --check-prefix=ALWAYS --check-prefix=REMARKS
9
10; This is the input program:
11;
12;     1	void forced (char *A, char *B, char *C, int N) {
13;     2	#pragma clang loop distribute(enable)
14;     3	  for(int i = 0; i < N; i++) {
15;     4	    A[i] = B[i] * C[i];
16;     5	  }
17;     6	}
18;     7
19;     8	void not_forced (char *A, char *B, char *C, int N) {
20;     9	  for(int i = 0; i < N; i++) {
21;    10	    A[i] = B[i] * C[i];
22;    11	  }
23;    12	}
24;    13
25;    14 void success (char *A, char *B, char *C, char *D, char *E, int N) {
26;    15   for(int i = 0; i < N; i++) {
27;    16     A[i + 1] = A[i] + B[i];
28;    17     C[i] = D[i] * E[i];
29;    18   }
30;    19 }
31
32target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
33target triple = "x86_64-apple-macosx10.11.0"
34
35; MISSED_REMARKS: remark:  /tmp/t.c:3:3: loop not distributed: use -Rpass-analysis=loop-distribute for more info
36; ALWAYS:         remark: /tmp/t.c:3:3: loop not distributed: memory operations are safe for vectorization
37; ALWAYS:         warning: /tmp/t.c:3:3: loop not disributed: failed explicitly specified loop distribution
38
39define void @forced(i8* %A, i8* %B, i8* %C, i32 %N) !dbg !7 {
40entry:
41  %cmp12 = icmp sgt i32 %N, 0, !dbg !9
42  br i1 %cmp12, label %ph, label %for.cond.cleanup, !dbg !10
43
44ph:
45  br label %for.body
46
47for.body:
48  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %ph ]
49  %arrayidx = getelementptr inbounds i8, i8* %B, i64 %indvars.iv, !dbg !12
50  %0 = load i8, i8* %arrayidx, align 1, !dbg !12, !tbaa !13
51  %arrayidx2 = getelementptr inbounds i8, i8* %C, i64 %indvars.iv, !dbg !16
52  %1 = load i8, i8* %arrayidx2, align 1, !dbg !16, !tbaa !13
53  %mul = mul i8 %1, %0, !dbg !17
54  %arrayidx6 = getelementptr inbounds i8, i8* %A, i64 %indvars.iv, !dbg !18
55  store i8 %mul, i8* %arrayidx6, align 1, !dbg !19, !tbaa !13
56  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10
57  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !10
58  %exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !10
59  br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !10, !llvm.loop !20
60
61for.cond.cleanup:
62  ret void, !dbg !11
63}
64
65; NO_REMARKS-NOT: remark: /tmp/t.c:9:3: loop not distributed: memory operations are safe for vectorization
66; MISSED_REMARKS: remark: /tmp/t.c:9:3: loop not distributed: use -Rpass-analysis=loop-distribute for more info
67; ANALYSIS_REMARKS: remark: /tmp/t.c:9:3: loop not distributed: memory operations are safe for vectorization
68; ALWAYS-NOT: warning: /tmp/t.c:9:3: loop not disributed: failed explicitly specified loop distribution
69
70define void @not_forced(i8* %A, i8* %B, i8* %C, i32 %N) !dbg !22 {
71entry:
72  %cmp12 = icmp sgt i32 %N, 0, !dbg !23
73  br i1 %cmp12, label %ph, label %for.cond.cleanup, !dbg !24
74
75ph:
76  br label %for.body
77
78for.body:
79  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %ph ]
80  %arrayidx = getelementptr inbounds i8, i8* %B, i64 %indvars.iv, !dbg !26
81  %0 = load i8, i8* %arrayidx, align 1, !dbg !26, !tbaa !13
82  %arrayidx2 = getelementptr inbounds i8, i8* %C, i64 %indvars.iv, !dbg !27
83  %1 = load i8, i8* %arrayidx2, align 1, !dbg !27, !tbaa !13
84  %mul = mul i8 %1, %0, !dbg !28
85  %arrayidx6 = getelementptr inbounds i8, i8* %A, i64 %indvars.iv, !dbg !29
86  store i8 %mul, i8* %arrayidx6, align 1, !dbg !30, !tbaa !13
87  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !24
88  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !24
89  %exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !24
90  br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !24
91
92for.cond.cleanup:
93  ret void, !dbg !25
94}
95
96; REMARKS: remark: /tmp/t.c:15:3: distributed loop
97
98define void @success(i8* %A, i8* %B, i8* %C, i8* %D, i8* %E, i32 %N) !dbg !31 {
99entry:
100  %cmp28 = icmp sgt i32 %N, 0, !dbg !32
101  br i1 %cmp28, label %ph, label %for.cond.cleanup, !dbg !33
102
103ph:
104  br label %for.body
105
106for.body:
107  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %ph ]
108  %arrayidx = getelementptr inbounds i8, i8* %A, i64 %indvars.iv, !dbg !35
109  %0 = load i8, i8* %arrayidx, align 1, !dbg !35, !tbaa !13
110  %arrayidx2 = getelementptr inbounds i8, i8* %B, i64 %indvars.iv, !dbg !36
111  %1 = load i8, i8* %arrayidx2, align 1, !dbg !36, !tbaa !13
112  %add = add i8 %1, %0, !dbg !37
113  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !33
114  %arrayidx7 = getelementptr inbounds i8, i8* %A, i64 %indvars.iv.next, !dbg !38
115  store i8 %add, i8* %arrayidx7, align 1, !dbg !39, !tbaa !13
116  %arrayidx9 = getelementptr inbounds i8, i8* %D, i64 %indvars.iv, !dbg !40
117  %2 = load i8, i8* %arrayidx9, align 1, !dbg !40, !tbaa !13
118  %arrayidx12 = getelementptr inbounds i8, i8* %E, i64 %indvars.iv, !dbg !41
119  %3 = load i8, i8* %arrayidx12, align 1, !dbg !41, !tbaa !13
120  %mul = mul i8 %3, %2, !dbg !42
121  %arrayidx16 = getelementptr inbounds i8, i8* %C, i64 %indvars.iv, !dbg !43
122  store i8 %mul, i8* %arrayidx16, align 1, !dbg !44, !tbaa !13
123  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !33
124  %exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !33
125  br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !33
126
127for.cond.cleanup:
128  ret void, !dbg !34
129}
130
131!llvm.dbg.cu = !{!0}
132!llvm.module.flags = !{!3, !4}
133
134!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 267633) (llvm/trunk 267675)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
135!1 = !DIFile(filename: "/tmp/t.c", directory: "/tmp")
136!2 = !{}
137!3 = !{i32 2, !"Dwarf Version", i32 2}
138!4 = !{i32 2, !"Debug Info Version", i32 3}
139!7 = distinct !DISubprogram(name: "forced", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
140!8 = !DISubroutineType(types: !2)
141!9 = !DILocation(line: 3, column: 20, scope: !7)
142!10 = !DILocation(line: 3, column: 3, scope: !7)
143!11 = !DILocation(line: 6, column: 1, scope: !7)
144!12 = !DILocation(line: 4, column: 12, scope: !7)
145!13 = !{!14, !14, i64 0}
146!14 = !{!"omnipotent char", !15, i64 0}
147!15 = !{!"Simple C/C++ TBAA"}
148!16 = !DILocation(line: 4, column: 19, scope: !7)
149!17 = !DILocation(line: 4, column: 17, scope: !7)
150!18 = !DILocation(line: 4, column: 5, scope: !7)
151!19 = !DILocation(line: 4, column: 10, scope: !7)
152!20 = distinct !{!20, !21}
153!21 = !{!"llvm.loop.distribute.enable", i1 true}
154!22 = distinct !DISubprogram(name: "not_forced", scope: !1, file: !1, line: 8, type: !8, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
155!23 = !DILocation(line: 9, column: 20, scope: !22)
156!24 = !DILocation(line: 9, column: 3, scope: !22)
157!25 = !DILocation(line: 12, column: 1, scope: !22)
158!26 = !DILocation(line: 10, column: 12, scope: !22)
159!27 = !DILocation(line: 10, column: 19, scope: !22)
160!28 = !DILocation(line: 10, column: 17, scope: !22)
161!29 = !DILocation(line: 10, column: 5, scope: !22)
162!30 = !DILocation(line: 10, column: 10, scope: !22)
163!31 = distinct !DISubprogram(name: "success", scope: !1, file: !1, line: 14, type: !8, isLocal: false, isDefinition: true, scopeLine: 14, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
164!32 = !DILocation(line: 15, column: 20, scope: !31)
165!33 = !DILocation(line: 15, column: 3, scope: !31)
166!34 = !DILocation(line: 19, column: 1, scope: !31)
167!35 = !DILocation(line: 16, column: 16, scope: !31)
168!36 = !DILocation(line: 16, column: 23, scope: !31)
169!37 = !DILocation(line: 16, column: 21, scope: !31)
170!38 = !DILocation(line: 16, column: 5, scope: !31)
171!39 = !DILocation(line: 16, column: 14, scope: !31)
172!40 = !DILocation(line: 17, column: 12, scope: !31)
173!41 = !DILocation(line: 17, column: 19, scope: !31)
174!42 = !DILocation(line: 17, column: 17, scope: !31)
175!43 = !DILocation(line: 17, column: 5, scope: !31)
176!44 = !DILocation(line: 17, column: 10, scope: !31)
177