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72 lines
3.2 KiB
LLVM
72 lines
3.2 KiB
LLVM
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; RUN: opt -S -strip-nonlinetable-debuginfo %s -o %t
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; RUN: cat %t | FileCheck %s
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; RUN: cat %t | FileCheck %s --check-prefix=NEGATIVE
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; void f(volatile int *i) {
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; while (--*i) {}
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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-macosx10.12.0"
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define void @f(i32* %i) local_unnamed_addr #0 !dbg !7 {
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entry:
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tail call void @llvm.dbg.value(metadata i32* %i, i64 0, metadata !14, metadata !15), !dbg !16
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br label %while.cond, !dbg !17
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while.cond: ; preds = %while.cond, %entry
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%0 = load volatile i32, i32* %i, align 4, !dbg !18, !tbaa !19
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%dec = add nsw i32 %0, -1, !dbg !18
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store volatile i32 %dec, i32* %i, align 4, !dbg !18, !tbaa !19
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%tobool = icmp eq i32 %dec, 0, !dbg !17
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; CHECK: !llvm.loop ![[LOOP:[0-9]+]]
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br i1 %tobool, label %while.end, label %while.cond, !dbg !17, !llvm.loop !23
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while.end: ; preds = %while.cond
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ret void, !dbg !25
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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; CHECK: ![[CU:.*]] = distinct !DICompileUnit(language: DW_LANG_C99,
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; CHECK-SAME: emissionKind: LineTablesOnly
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; NEGATIVE-NOT: !DICompileUnit({{.*}} emissionKind: FullDebug
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 (trunk 298880) (llvm/trunk 298875)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "/tmp/loop.c", directory: "/")
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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, !"PIC Level", i32 2}
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!6 = !{!"clang version 5.0.0 (trunk 298880) (llvm/trunk 298875)"}
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; CHECK: ![[F:[0-9]]] = distinct !DISubprogram(name: "f", scope: !1
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!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !13)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
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!11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !12)
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; NEGATIVE-NOT: !DIBasicType(name: "int",
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !{!14}
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!14 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!15 = !DIExpression()
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!16 = !DILocation(line: 1, column: 22, scope: !7)
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; CHECK: ![[BEGIN:[0-9]+]] = !DILocation(line: 2, column: 3, scope: ![[F]])
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!17 = !DILocation(line: 2, column: 3, scope: !7)
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!18 = !DILocation(line: 2, column: 10, scope: !7)
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!19 = !{!20, !20, i64 0}
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!20 = !{!"int", !21, i64 0}
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!21 = !{!"omnipotent char", !22, i64 0}
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!22 = !{!"Simple C/C++ TBAA"}
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; CHECK: ![[LOOP]] = distinct !{![[LOOP]], ![[BEGIN]], ![[END:[0-9]+]]}
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!23 = distinct !{!23, !17, !24}
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; CHECK: ![[END]] = !DILocation(line: 3, column: 3, scope: ![[F]])
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!24 = !DILocation(line: 3, column: 3, scope: !7)
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!25 = !DILocation(line: 4, column: 1, scope: !7)
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