1 ; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch \ 2 ; RUN: -pass-remarks=loop-data-prefetch -S -max-prefetch-iters-ahead=100 \ 3 ; RUN: < %s 2>&1 | FileCheck %s 4 5 ; ModuleID = '/tmp/s.c' 6 source_filename = "/tmp/s.c" 7 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 8 target triple = "arm64-apple-ios5.0.0" 9 10 ; 1 struct MyStruct { 11 ; 2 int field; 12 ; 3 char kk[2044]; 13 ; 4 } *my_struct; 14 ; 5 15 ; 6 int f(struct MyStruct *p, int N) { 16 ; 7 int total = 0; 17 ; 8 for (int i = 0; i < N; i++) { 18 ; 9 total += my_struct[i].field; 19 ; 10 } 20 ; 11 return total; 21 ; 12 } 22 23 ; CHECK: remark: /tmp/s.c:9:27: prefetched memory access 24 25 %struct.MyStruct = type { i32, [2044 x i8] } 26 27 @my_struct = common global %struct.MyStruct* null, align 8 28 29 define i32 @f(%struct.MyStruct* nocapture readnone %p, i32 %N) !dbg !6 { 30 entry: 31 %cmp6 = icmp sgt i32 %N, 0, !dbg !8 32 br i1 %cmp6, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !9 33 34 for.body.lr.ph: ; preds = %entry 35 %0 = load %struct.MyStruct*, %struct.MyStruct** @my_struct, align 8, !dbg !10, !tbaa !11 36 br label %for.body, !dbg !9 37 38 for.cond.cleanup: ; preds = %for.body, %entry 39 %total.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] 40 ret i32 %total.0.lcssa, !dbg !15 41 42 for.body: ; preds = %for.body, %for.body.lr.ph 43 %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] 44 %total.07 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ] 45 %field = getelementptr inbounds %struct.MyStruct, %struct.MyStruct* %0, i64 %indvars.iv, i32 0, !dbg !16 46 %1 = load i32, i32* %field, align 4, !dbg !16, !tbaa !17 47 %add = add nsw i32 %1, %total.07, !dbg !20 48 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !9 49 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !9 50 %exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !9 51 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !9 52 } 53 54 !llvm.dbg.cu = !{!0} 55 !llvm.module.flags = !{!3, !4} 56 !llvm.ident = !{!5} 57 58 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2) 59 !1 = !DIFile(filename: "/tmp/s.c", directory: "/tmp") 60 !2 = !{} 61 !3 = !{i32 2, !"Debug Info Version", i32 3} 62 !4 = !{i32 1, !"PIC Level", i32 2} 63 !5 = !{!"clang version 3.9.0"} 64 !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, variables: !2) 65 !7 = !DISubroutineType(types: !2) 66 !8 = !DILocation(line: 8, column: 21, scope: !6) 67 !9 = !DILocation(line: 8, column: 3, scope: !6) 68 !10 = !DILocation(line: 9, column: 14, scope: !6) 69 !11 = !{!12, !12, i64 0} 70 !12 = !{!"any pointer", !13, i64 0} 71 !13 = !{!"omnipotent char", !14, i64 0} 72 !14 = !{!"Simple C/C++ TBAA"} 73 !15 = !DILocation(line: 11, column: 3, scope: !6) 74 !16 = !DILocation(line: 9, column: 27, scope: !6) 75 !17 = !{!18, !19, i64 0} 76 !18 = !{!"MyStruct", !19, i64 0, !13, i64 4} 77 !19 = !{!"int", !13, i64 0} 78 !20 = !DILocation(line: 9, column: 11, scope: !6) 79
