1 ; RUN: opt -passes=loop-vectorize -pass-remarks-analysis=loop-vectorize < %s 2>&1 | FileCheck %s
6 ; 4 void f(int a, int n) {
7 ; 5 for (int i = 0; i < n; ++i) {
13 ; CHECK: remark: /tmp/s.c:5:3: loop not vectorized: value that could not be identified as reduction is used outside the loop
15 ; %a.addr.08 is the phi corresponding to the remark. It does not have debug
16 ; location attached. In this case we should use the debug location of the
17 ; loop rather than emitting <unknown>:0:0:
19 ; ModuleID = '/tmp/s.c'
20 source_filename = "/tmp/s.c"
21 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
23 @out = external local_unnamed_addr global [0 x i32], align 4
24 @map = external local_unnamed_addr global [0 x i32], align 4
26 ; Function Attrs: norecurse nounwind ssp uwtable
27 define void @f(i32 %a, i32 %n) local_unnamed_addr #0 !dbg !6 {
29 %cmp7 = icmp sgt i32 %n, 0, !dbg !8
30 br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup, !dbg !9
32 for.body.preheader: ; preds = %entry
33 %wide.trip.count = zext i32 %n to i64, !dbg !9
34 br label %for.body, !dbg !10
36 for.cond.cleanup: ; preds = %for.body, %entry
39 for.body: ; preds = %for.body.preheader, %for.body
40 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
41 %a.addr.08 = phi i32 [ %0, %for.body ], [ %a, %for.body.preheader ]
43 %arrayidx = getelementptr inbounds [0 x i32], ptr @out, i64 0, i64 %indvars.iv, !dbg !10
44 store i32 %a.addr.08, ptr %arrayidx, align 4, !dbg !12, !tbaa !13
45 %idxprom1 = sext i32 %a.addr.08 to i64, !dbg !17
46 %arrayidx2 = getelementptr inbounds [0 x i32], ptr @map, i64 0, i64 %idxprom1, !dbg !17
47 %0 = load i32, ptr %arrayidx2, align 4, !dbg !17, !tbaa !13
48 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !9
49 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count, !dbg !9
50 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !9, !llvm.loop !18
53 attributes #0 = { norecurse nounwind ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="core2" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
56 !llvm.module.flags = !{!3, !4}
59 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 281293) (llvm/trunk 281290)", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
60 !1 = !DIFile(filename: "/tmp/s.c", directory: "/tmp")
62 !3 = !{i32 2, !"Debug Info Version", i32 3}
63 !4 = !{i32 1, !"PIC Level", i32 2}
64 !5 = !{!"clang version 4.0.0 (trunk 281293) (llvm/trunk 281290)"}
65 !6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 4, type: !7, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
66 !7 = !DISubroutineType(types: !2)
67 !8 = !DILocation(line: 5, column: 21, scope: !6)
68 !9 = !DILocation(line: 5, column: 3, scope: !6)
69 !10 = !DILocation(line: 6, column: 5, scope: !6)
70 !11 = !DILocation(line: 9, column: 1, scope: !6)
71 !12 = !DILocation(line: 6, column: 12, scope: !6)
72 !13 = !{!14, !14, i64 0}
73 !14 = !{!"int", !15, i64 0}
74 !15 = !{!"omnipotent char", !16, i64 0}
75 !16 = !{!"Simple C/C++ TBAA"}
76 !17 = !DILocation(line: 7, column: 9, scope: !6)
77 !18 = distinct !{!18, !9}