1 ; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -passes=loop-data-prefetch \
2 ; RUN: -pass-remarks=loop-data-prefetch -S -max-prefetch-iters-ahead=100 \
3 ; RUN: -pass-remarks-with-hotness \
4 ; RUN: < %s 2>&1 | FileCheck %s
6 ; ModuleID = '/tmp/s.c'
7 source_filename = "/tmp/s.c"
8 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
9 target triple = "arm64-apple-ios5.0.0"
16 ; 6 int f(struct MyStruct *p, int N) {
18 ; 8 for (int i = 0; i < N; i++) {
19 ; 9 total += my_struct[i].field;
24 ; CHECK: remark: /tmp/s.c:9:27: prefetched memory access (hotness: 600)
26 %struct.MyStruct = type { i32, [2044 x i8] }
28 @my_struct = common global ptr null, align 8
30 define i32 @f(ptr nocapture readnone %p, i32 %N) !dbg !6 !prof !21 {
32 %cmp6 = icmp sgt i32 %N, 0, !dbg !8
33 br i1 %cmp6, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !9, !prof !22
35 for.body.lr.ph: ; preds = %entry
36 %0 = load ptr, ptr @my_struct, align 8, !dbg !10, !tbaa !11
37 br label %for.body, !dbg !9
39 for.cond.cleanup: ; preds = %for.body, %entry
40 %total.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
41 ret i32 %total.0.lcssa, !dbg !15
43 for.body: ; preds = %for.body, %for.body.lr.ph
44 %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
45 %total.07 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
46 %field = getelementptr inbounds %struct.MyStruct, ptr %0, i64 %indvars.iv, i32 0, !dbg !16
47 %1 = load i32, ptr %field, align 4, !dbg !16, !tbaa !17
48 %add = add nsw i32 %1, %total.07, !dbg !20
49 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !9
50 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !9
51 %exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !9
52 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !9, !prof !23
56 !llvm.module.flags = !{!3, !4}
59 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0", 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 3.9.0"}
65 !6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 6, type: !7, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
66 !7 = !DISubroutineType(types: !2)
67 !8 = !DILocation(line: 8, column: 21, scope: !6)
68 !9 = !DILocation(line: 8, column: 3, scope: !6)
69 !10 = !DILocation(line: 9, column: 14, scope: !6)
70 !11 = !{!12, !12, i64 0}
71 !12 = !{!"any pointer", !13, i64 0}
72 !13 = !{!"omnipotent char", !14, i64 0}
73 !14 = !{!"Simple C/C++ TBAA"}
74 !15 = !DILocation(line: 11, column: 3, scope: !6)
75 !16 = !DILocation(line: 9, column: 27, scope: !6)
76 !17 = !{!18, !19, i64 0}
77 !18 = !{!"MyStruct", !19, i64 0, !13, i64 4}
78 !19 = !{!"int", !13, i64 0}
79 !20 = !DILocation(line: 9, column: 11, scope: !6)
80 !21 = !{!"function_entry_count", i64 6}
81 !22 = !{!"branch_weights", i32 2000, i32 1}
82 !23 = !{!"branch_weights", i32 1, i32 99}