82 lines
3.3 KiB
LLVM
82 lines
3.3 KiB
LLVM
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; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch \
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; RUN: -pass-remarks=loop-data-prefetch -S -max-prefetch-iters-ahead=100 \
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; RUN: < %s 2>&1 | FileCheck %s
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; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -passes=loop-data-prefetch \
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; RUN: -pass-remarks=loop-data-prefetch -S -max-prefetch-iters-ahead=100 \
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; RUN: < %s 2>&1 | FileCheck %s
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; ModuleID = '/tmp/s.c'
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source_filename = "/tmp/s.c"
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-ios5.0.0"
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; 1 struct MyStruct {
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; 2 int field;
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; 3 char kk[2044];
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; 4 } *my_struct;
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; 5
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; 6 int f(struct MyStruct *p, int N) {
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; 7 int total = 0;
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; 8 for (int i = 0; i < N; i++) {
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; 9 total += my_struct[i].field;
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; 10 }
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; 11 return total;
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; 12 }
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; CHECK: remark: /tmp/s.c:9:27: prefetched memory access
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%struct.MyStruct = type { i32, [2044 x i8] }
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@my_struct = common global %struct.MyStruct* null, align 8
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define i32 @f(%struct.MyStruct* nocapture readnone %p, i32 %N) !dbg !6 {
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entry:
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%cmp6 = icmp sgt i32 %N, 0, !dbg !8
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br i1 %cmp6, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !9
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for.body.lr.ph: ; preds = %entry
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%0 = load %struct.MyStruct*, %struct.MyStruct** @my_struct, align 8, !dbg !10, !tbaa !11
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br label %for.body, !dbg !9
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for.cond.cleanup: ; preds = %for.body, %entry
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%total.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
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ret i32 %total.0.lcssa, !dbg !15
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for.body: ; preds = %for.body, %for.body.lr.ph
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%indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
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%total.07 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
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%field = getelementptr inbounds %struct.MyStruct, %struct.MyStruct* %0, i64 %indvars.iv, i32 0, !dbg !16
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%1 = load i32, i32* %field, align 4, !dbg !16, !tbaa !17
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%add = add nsw i32 %1, %total.07, !dbg !20
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !9
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !9
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%exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !9
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br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !9
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
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!1 = !DIFile(filename: "/tmp/s.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"PIC Level", i32 2}
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!5 = !{!"clang version 3.9.0"}
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!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)
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!7 = !DISubroutineType(types: !2)
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!8 = !DILocation(line: 8, column: 21, scope: !6)
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!9 = !DILocation(line: 8, column: 3, scope: !6)
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!10 = !DILocation(line: 9, column: 14, scope: !6)
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!11 = !{!12, !12, i64 0}
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!12 = !{!"any pointer", !13, i64 0}
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!13 = !{!"omnipotent char", !14, i64 0}
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!14 = !{!"Simple C/C++ TBAA"}
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!15 = !DILocation(line: 11, column: 3, scope: !6)
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!16 = !DILocation(line: 9, column: 27, scope: !6)
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!17 = !{!18, !19, i64 0}
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!18 = !{!"MyStruct", !19, i64 0, !13, i64 4}
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!19 = !{!"int", !13, i64 0}
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!20 = !DILocation(line: 9, column: 11, scope: !6)
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