77 lines
3.5 KiB
LLVM
77 lines
3.5 KiB
LLVM
; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
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; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
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; Make sure poison value tracking works in the presence of @llvm.dbg
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; intrinsics. Unfortunately, I was not able to reduce this file
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; further while still keeping the debug info well formed.
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define void @foo(i32 %n, i32* %arr) !dbg !7 {
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; CHECK-LABEL: Classifying expressions for: @foo
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entry:
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%cmp1 = icmp slt i32 0, %n, !dbg !12
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br i1 %cmp1, label %for.body.lr.ph, label %for.end, !dbg !15
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for.body.lr.ph: ; preds = %entry
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br label %for.body, !dbg !15
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for.body: ; preds = %for.inc, %for.body.lr.ph
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%i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
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%add = add nsw i32 %i.02, 50, !dbg !16
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call void @llvm.dbg.value(metadata i32 %add, i64 0, metadata !18, metadata !19), !dbg !20
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%idxprom = sext i32 %add to i64, !dbg !21
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; CHECK: %idxprom = sext i32 %add to i64
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; CHECK-NEXT: --> {50,+,1}<nuw><nsw><%for.body>
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%arrayidx = getelementptr inbounds i32, i32* %arr, i64 %idxprom, !dbg !21
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store i32 100, i32* %arrayidx, align 4, !dbg !22
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br label %for.inc, !dbg !23
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for.inc: ; preds = %for.body
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%inc = add nsw i32 %i.02, 1, !dbg !24
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%cmp = icmp slt i32 %inc, %n, !dbg !12
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br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !15, !llvm.loop !25
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for.cond.for.end_crit_edge: ; preds = %for.inc
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br label %for.end, !dbg !15
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for.end: ; preds = %for.cond.for.end_crit_edge, %entry
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ret void, !dbg !27
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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)
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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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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (llvm/trunk 271857)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "x.c", directory: "/Users/sanjoy/Code/clang/build/debug+asserts-x86")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 2}
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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 3.9.0 (llvm/trunk 271857)"}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10, !11}
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!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64)
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!12 = !DILocation(line: 2, column: 24, scope: !13)
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!13 = distinct !DILexicalBlock(scope: !14, file: !1, line: 2, column: 6)
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!14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 6)
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!15 = !DILocation(line: 2, column: 6, scope: !14)
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!16 = !DILocation(line: 3, column: 14, scope: !17)
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!17 = distinct !DILexicalBlock(scope: !13, file: !1, line: 2, column: 34)
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!18 = !DILocalVariable(name: "k", scope: !17, file: !1, line: 3, type: !10)
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!19 = !DIExpression()
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!20 = !DILocation(line: 3, column: 8, scope: !17)
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!21 = !DILocation(line: 4, column: 4, scope: !17)
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!22 = !DILocation(line: 4, column: 11, scope: !17)
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!23 = !DILocation(line: 5, column: 6, scope: !17)
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!24 = !DILocation(line: 2, column: 30, scope: !13)
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!25 = distinct !{!25, !26}
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!26 = !DILocation(line: 2, column: 6, scope: !7)
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!27 = !DILocation(line: 6, column: 1, scope: !7)
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