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67886a34d2
Summary: Most DIExpressions are empty or very simple. When they are complex, they tend to be unique, so checking them inline is reasonable. This also avoids the need for CodeGen passes to append to the llvm.dbg.mir named md node. See also PR22780, for making DIExpression not be an MDNode. Reviewers: aprantl, dexonsmith, dblaikie Subscribers: qcolombet, javed.absar, eraman, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37075 llvm-svn: 311594
70 lines
3.0 KiB
LLVM
70 lines
3.0 KiB
LLVM
; RUN: llc %s -stop-after=livedebugvars -o %t
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; RUN: cat %t | FileCheck %s
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;
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; Test that we can emit debug info for large values that are split
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; up across multiple registers by the SelectionDAG type legalizer.
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;
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; // Compile with -O1 -m32.
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; long long foo (long long a, long long b)
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; {
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; long long res = b+1;
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; if ( a == b )
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; return res;
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; return 0;
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; }
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;
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; CHECK-DAG: DBG_VALUE debug-use %{{[a-z]+}}, debug-use _, !{{[0-9]+}}, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !{{[0-9]+}}
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; CHECK-DAG: DBG_VALUE debug-use %{{[a-z]+}}, debug-use _, !{{[0-9]+}}, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !{{[0-9]+}}
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; ModuleID = 'sdagsplit-1.c'
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i386"
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; Function Attrs: nounwind readnone
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define i64 @foo(i64 %a, i64 %b) local_unnamed_addr #0 !dbg !8 {
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entry:
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tail call void @llvm.dbg.value(metadata i64 %a, metadata !13, metadata !16), !dbg !17
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tail call void @llvm.dbg.value(metadata i64 %b, metadata !14, metadata !16), !dbg !18
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tail call void @llvm.dbg.value(metadata i64 %add, metadata !15, metadata !16), !dbg !19
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%cmp = icmp eq i64 %a, %b, !dbg !20
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%add = add nsw i64 %b, 1, !dbg !22
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%retval.0 = select i1 %cmp, i64 %add, i64 0, !dbg !23
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ret i64 %retval.0, !dbg !24
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind readnone speculatable }
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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 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "sdagsplit-1.c", directory: "/X86")
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!2 = !{}
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!3 = !{i32 1, !"NumRegisterParameters", i32 0}
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!4 = !{i32 2, !"Dwarf Version", i32 2}
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!5 = !{i32 2, !"Debug Info Version", i32 3}
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!6 = !{i32 1, !"wchar_size", i32 4}
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!7 = !{!"clang version 6.0.0 "}
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!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !12)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !11, !11}
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!11 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
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!12 = !{!13, !14, !15}
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!13 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 2, type: !11)
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!14 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 2, type: !11)
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!15 = !DILocalVariable(name: "res", scope: !8, file: !1, line: 4, type: !11)
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!16 = !DIExpression()
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!17 = !DILocation(line: 2, column: 26, scope: !8)
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!18 = !DILocation(line: 2, column: 39, scope: !8)
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!19 = !DILocation(line: 4, column: 12, scope: !8)
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!20 = !DILocation(line: 5, column: 9, scope: !21)
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!21 = distinct !DILexicalBlock(scope: !8, file: !1, line: 5, column: 7)
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!22 = !DILocation(line: 4, column: 19, scope: !8)
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!23 = !DILocation(line: 5, column: 7, scope: !8)
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!24 = !DILocation(line: 8, column: 1, scope: !8)
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