99 lines
4.9 KiB
LLVM
99 lines
4.9 KiB
LLVM
; RUN: opt -passes=mem2reg -S %s -o - \
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; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
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; RUN: opt --try-experimental-debuginfo-iterators -passes=mem2reg -S %s -o - \
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; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
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;; Test assignment tracking debug info when mem2reg promotes an alloca with
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;; stores requiring insertion of a phi. Check the output when the stores are
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;; tagged and also untagged (test manually updated for the latter by linking a
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;; dbg.assgin for another variable "b" to the alloca).
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; CHECK: entry:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %a, metadata ![[B:[0-9]+]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %a, metadata ![[A:[0-9]+]]
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; CHECK: if.then:
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; CHECK-NEXT: %add =
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %add, metadata ![[B]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %add, metadata ![[A]]
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; CHECK: if.else:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 -1, metadata ![[B]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 -1, metadata ![[A]]
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; CHECK: if.end:
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; CHECK-NEXT: %a.addr.0 = phi i32
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %a.addr.0, metadata ![[A]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %a.addr.0, metadata ![[B]]
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; CHECK-DAG: ![[A]] = !DILocalVariable(name: "a",
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; CHECK-DAG: ![[B]] = !DILocalVariable(name: "b",
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;; $ cat test.cpp
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;; int f(int a) {
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;; if (a)
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;; a += 1;
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;; else
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;; a = -1;
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;; return a;
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;; }
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define dso_local noundef i32 @_Z1fi(i32 noundef %a) #0 !dbg !7 {
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entry:
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%a.addr = alloca i32, align 4, !DIAssignID !13
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call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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call void @llvm.dbg.assign(metadata i1 undef, metadata !30, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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store i32 %a, ptr %a.addr, align 4, !DIAssignID !19
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call void @llvm.dbg.assign(metadata i32 %a, metadata !12, metadata !DIExpression(), metadata !19, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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%0 = load i32, ptr %a.addr, align 4, !dbg !20
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%tobool = icmp ne i32 %0, 0, !dbg !20
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br i1 %tobool, label %if.then, label %if.else, !dbg !22
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if.then: ; preds = %entry
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%1 = load i32, ptr %a.addr, align 4, !dbg !23
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%add = add nsw i32 %1, 1, !dbg !23
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store i32 %add, ptr %a.addr, align 4, !dbg !23, !DIAssignID !24
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call void @llvm.dbg.assign(metadata i32 %add, metadata !12, metadata !DIExpression(), metadata !24, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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br label %if.end, !dbg !25
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if.else: ; preds = %entry
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store i32 -1, ptr %a.addr, align 4, !dbg !26, !DIAssignID !27
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call void @llvm.dbg.assign(metadata i32 -1, metadata !12, metadata !DIExpression(), metadata !27, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%2 = load i32, ptr %a.addr, align 4, !dbg !28
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ret i32 %2, !dbg !29
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}
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declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !1000}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "/")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 1}
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!6 = !{!"clang version 14.0.0"}
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!7 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!13 = distinct !DIAssignID()
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!14 = !DILocation(line: 0, scope: !7)
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!19 = distinct !DIAssignID()
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!20 = !DILocation(line: 2, column: 7, scope: !21)
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!21 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 7)
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!22 = !DILocation(line: 2, column: 7, scope: !7)
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!23 = !DILocation(line: 3, column: 7, scope: !21)
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!24 = distinct !DIAssignID()
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!25 = !DILocation(line: 3, column: 5, scope: !21)
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!26 = !DILocation(line: 5, column: 7, scope: !21)
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!27 = distinct !DIAssignID()
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!28 = !DILocation(line: 6, column: 10, scope: !7)
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!29 = !DILocation(line: 6, column: 3, scope: !7)
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!30 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 1, type: !10)
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!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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