76 lines
3.4 KiB
LLVM
76 lines
3.4 KiB
LLVM
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; RUN: opt %s -S -o - -loop-unroll | FileCheck %s
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; generated at -O3 from:
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; void f() {
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; for (int i = 1; i <=32; i <<=2 )
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; bar(i>>1);
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; }
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source_filename = "/tmp/loop.c"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.13.0"
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; Function Attrs: nounwind ssp uwtable
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define void @f() local_unnamed_addr #0 !dbg !8 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 1, metadata !12, metadata !DIExpression()), !dbg !15
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br label %for.body, !dbg !16
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for.cond.cleanup: ; preds = %for.body
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ret void, !dbg !17
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for.body: ; preds = %entry, %for.body
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%i.04 = phi i32 [ 1, %entry ], [ %shl, %for.body ]
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tail call void @llvm.dbg.value(metadata i32 %i.04, metadata !12, metadata !DIExpression()), !dbg !15
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%shr = ashr i32 %i.04, 1, !dbg !18
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; The loop gets unrolled entirely.
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; CHECK: call void @llvm.dbg.value(metadata i32 1, metadata !12, metadata !DIExpression()), !dbg !15
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; CHECK: call void @llvm.dbg.value(metadata i32 4, metadata !12, metadata !DIExpression()), !dbg !15
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; CHECK: call void @llvm.dbg.value(metadata i32 16, metadata !12, metadata !DIExpression()), !dbg !15
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; CHECK: call void @llvm.dbg.value(metadata i32 64, metadata !12, metadata !DIExpression()), !dbg !15
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%call = tail call i32 (i32, ...) bitcast (i32 (...)* @bar to i32 (i32, ...)*)(i32 %shr) #3, !dbg !20
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%shl = shl i32 %i.04, 2, !dbg !21
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tail call void @llvm.dbg.value(metadata i32 %shl, metadata !12, metadata !DIExpression()), !dbg !15
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%cmp = icmp slt i32 %shl, 33, !dbg !22
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br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !16, !llvm.loop !23
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}
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declare i32 @bar(...) local_unnamed_addr
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind ssp uwtable }
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attributes #2 = { nounwind readnone speculatable }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 317113) (llvm/trunk 317122)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "/tmp/loop.c", directory: "/Data/llvm")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!"clang version 6.0.0 (trunk 317113) (llvm/trunk 317122)"}
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!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !11)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null}
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!11 = !{!12}
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!12 = !DILocalVariable(name: "i", scope: !13, file: !1, line: 2, type: !14)
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!13 = distinct !DILexicalBlock(scope: !8, file: !1, line: 2, column: 3)
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!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!15 = !DILocation(line: 2, column: 12, scope: !13)
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!16 = !DILocation(line: 2, column: 3, scope: !13)
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!17 = !DILocation(line: 4, column: 1, scope: !8)
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!18 = !DILocation(line: 3, column: 10, scope: !19)
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!19 = distinct !DILexicalBlock(scope: !13, file: !1, line: 2, column: 3)
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!20 = !DILocation(line: 3, column: 5, scope: !19)
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!21 = !DILocation(line: 2, column: 29, scope: !19)
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!22 = !DILocation(line: 2, column: 21, scope: !19)
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!23 = distinct !{!23, !16, !24}
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!24 = !DILocation(line: 3, column: 13, scope: !13)
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