e09758224b
This patch makes jump-threading handle non-instruction debug-info stored in DPValues in the same way that it updates dbg.values nowadays. This involves re-targetting their operands as with dbg.values getting moved from one block to another, and manually cloning them when duplicating blocks. The SSAUpdater class also grows some functions for SSA-updating DPValues in the same way as dbg.values. All of this is largely covered by existing debug-info tests, except for the cloning of DPValues attached to elidable instructions and branches, where I've added a test to thread-debug-info.ll. Where previously we could rely on dbg.values being copied and cloned as normal instructions are, as we need to explicitly perform that operation now I've added some explicit testing for it.
80 lines
4.1 KiB
LLVM
80 lines
4.1 KiB
LLVM
; RUN: opt -passes=jump-threading -S < %s | FileCheck %s
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; RUN: opt -passes=jump-threading -S < %s --try-experimental-debuginfo-iterators | FileCheck %s
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define dso_local i32 @_Z3fooi(i32 %a) !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 %a, metadata !12, metadata !DIExpression()), !dbg !13
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call void @llvm.dbg.value(metadata i32 1, metadata !14, metadata !DIExpression()), !dbg !13
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%tobool = icmp ne i32 %a, 0, !dbg !15
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br i1 %tobool, label %if.then, label %if.end, !dbg !17
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if.then: ; preds = %entry
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call void @_Z4callv(), !dbg !18
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call void @llvm.dbg.value(metadata i32 0, metadata !14, metadata !DIExpression()), !dbg !13
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br label %if.end, !dbg !20
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if.end: ; preds = %if.then, %entry
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%c.0 = phi i32 [ 0, %if.then ], [ 1, %entry ], !dbg !13
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call void @llvm.dbg.value(metadata i32 %c.0, metadata !14, metadata !DIExpression()), !dbg !13
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%tobool1 = icmp ne i32 %c.0, 0, !dbg !21
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br i1 %tobool1, label %if.else, label %if.then2, !dbg !23
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; CHECK-LABEL: if.then2:
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; CHECK: call void @llvm.dbg.value({{.+}}, metadata ![[B:[0-9]+]], metadata !DIExpression())
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; CHECK: call void @llvm.dbg.value({{.+}}, metadata ![[B:[0-9]+]], metadata !DIExpression())
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; CHECK-NOT: call void @llvm.dbg.value({{.+}}, metadata ![[B]], metadata !DIExpression())
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if.then2: ; preds = %if.end
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call void @llvm.dbg.value(metadata i32 4, metadata !24, metadata !DIExpression()), !dbg !13
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br label %if.end3, !dbg !25
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; CHECK-LABEL: if.end3:
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if.else: ; preds = %if.end
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call void @llvm.dbg.value(metadata i32 6, metadata !24, metadata !DIExpression()), !dbg !13
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br label %if.end3
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if.end3: ; preds = %if.else, %if.then2
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%b.0 = phi i32 [ 6, %if.else ], [ 4, %if.then2 ], !dbg !27
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call void @llvm.dbg.value(metadata i32 %b.0, metadata !24, metadata !DIExpression()), !dbg !13
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ret i32 %b.0, !dbg !28
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare dso_local void @_Z4callv()
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, 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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; CHECK: ![[B]] = !DILocalVariable(name: "b"
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "/")
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!2 = !{}
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!3 = !{i32 7, !"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 = !{!"clang version 10.0.0"}
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!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !8, file: !8, line: 3, type: !9, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DIFile(filename: "./test.cpp", directory: "/")
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !8, line: 3, type: !11)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocalVariable(name: "c", scope: !7, file: !8, line: 4, type: !11)
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!15 = !DILocation(line: 5, column: 7, scope: !16)
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!16 = distinct !DILexicalBlock(scope: !7, file: !8, line: 5, column: 7)
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!17 = !DILocation(line: 5, column: 7, scope: !7)
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!18 = !DILocation(line: 6, column: 5, scope: !19)
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!19 = distinct !DILexicalBlock(scope: !16, file: !8, line: 5, column: 10)
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!20 = !DILocation(line: 8, column: 3, scope: !19)
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!21 = !DILocation(line: 9, column: 8, scope: !22)
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!22 = distinct !DILexicalBlock(scope: !7, file: !8, line: 9, column: 7)
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!23 = !DILocation(line: 9, column: 7, scope: !7)
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!24 = !DILocalVariable(name: "b", scope: !7, file: !8, line: 4, type: !11)
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!25 = !DILocation(line: 11, column: 3, scope: !26)
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!26 = distinct !DILexicalBlock(scope: !22, file: !8, line: 9, column: 11)
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!27 = !DILocation(line: 0, scope: !22)
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!28 = !DILocation(line: 14, column: 3, scope: !7)
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