forked from OSchip/llvm-project
115 lines
4.9 KiB
LLVM
115 lines
4.9 KiB
LLVM
; RUN: opt -instcombine < %s -S | FileCheck %s
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; This tests dbg.declare lowering for CallInst users of an alloca. The
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; resulting dbg.value expressions should add a deref to the declare's expression.
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; Hand-reduced from this example (-g -Og -mllvm -disable-llvm-optzns -gno-column-info):
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; static volatile int sink;
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; static void escape(int &c) { sink = c; }
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; static bool empty ( int p1 ) { return p1 == 0; }
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; int main() {
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; int d1 = 42;
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; while (!empty(d1))
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; escape(d1);
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; return 0;
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; }
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@_ZL4sink = internal global i32 0, align 4, !dbg !0
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; CHECK-LABEL: @main
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define dso_local i32 @main() !dbg !12 {
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entry:
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%retval = alloca i32, align 4
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%d1 = alloca i32, align 4
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store i32 0, i32* %retval, align 4
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%0 = bitcast i32* %d1 to i8*, !dbg !17
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call void @llvm.lifetime.start.p0i8(i64 4, i8* %0) #4, !dbg !17
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; CHECK: dbg.value(metadata i32 42, metadata [[METADATA_IDX1:![0-9]+]], metadata !DIExpression())
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; CHECK-NEXT: store
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call void @llvm.dbg.declare(metadata i32* %d1, metadata !16, metadata !DIExpression()), !dbg !17
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store i32 42, i32* %d1, align 4, !dbg !17
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br label %while.cond, !dbg !22
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while.cond: ; preds = %while.body, %entry
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; CHECK: dbg.value(metadata i32 %1, metadata [[METADATA_IDX1]], metadata !DIExpression())
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; CHECK-NEXT: call zeroext i1 @_ZL5emptyi
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%1 = load i32, i32* %d1, align 4, !dbg !22
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%call = call zeroext i1 @_ZL5emptyi(i32 %1), !dbg !22
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%lnot = xor i1 %call, true, !dbg !22
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br i1 %lnot, label %while.body, label %while.end, !dbg !22
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while.body: ; preds = %while.cond
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; CHECK: dbg.value(metadata i32* %d1, metadata [[METADATA_IDX1]], metadata !DIExpression(DW_OP_deref))
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; CHECK-NEXT: call void @_ZL6escapeRi
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call void @_ZL6escapeRi(i32* dereferenceable(4) %d1), !dbg !23
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br label %while.cond, !dbg !22, !llvm.loop !24
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while.end: ; preds = %while.cond
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%2 = bitcast i32* %d1 to i8*, !dbg !25
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %2) #4, !dbg !25
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ret i32 0, !dbg !26
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}
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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define internal zeroext i1 @_ZL5emptyi(i32 %p1) !dbg !27 {
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ret i1 false
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}
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define internal void @_ZL6escapeRi(i32* dereferenceable(4) %c) #3 !dbg !34 {
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ret void
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}
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!8, !9, !10}
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!llvm.ident = !{!11}
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; CHECK: DIGlobalVariableExpression
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; CHECK: [[METADATA_IDX1]] = !DILocalVariable(name: "d1"
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "sink", linkageName: "_ZL4sink", scope: !2, file: !3, line: 2, type: !6, isLocal: true, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
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!3 = !DIFile(filename: "lower-dbg-declare.cpp", directory: "")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)
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!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"wchar_size", i32 4}
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!11 = !{!"clang"}
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!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 5, type: !13, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !15)
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!13 = !DISubroutineType(types: !14)
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!14 = !{!7}
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!15 = !{!16}
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!16 = !DILocalVariable(name: "d1", scope: !12, file: !3, line: 6, type: !7)
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!17 = !DILocation(line: 6, scope: !12)
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!22 = !DILocation(line: 7, scope: !12)
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!23 = !DILocation(line: 8, scope: !12)
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!24 = distinct !{!24, !22, !23}
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!25 = !DILocation(line: 10, scope: !12)
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!26 = !DILocation(line: 9, scope: !12)
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!27 = distinct !DISubprogram(name: "empty", linkageName: "_ZL5emptyi", scope: !3, file: !3, line: 4, type: !28, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !31)
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!28 = !DISubroutineType(types: !29)
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!29 = !{!30, !7}
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!30 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
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!31 = !{!32}
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!32 = !DILocalVariable(name: "p1", arg: 1, scope: !27, file: !3, line: 4, type: !7)
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!33 = !DILocation(line: 4, scope: !27)
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!34 = distinct !DISubprogram(name: "escape", linkageName: "_ZL6escapeRi", scope: !3, file: !3, line: 3, type: !35, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !38)
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!35 = !DISubroutineType(types: !36)
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!36 = !{null, !37}
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!37 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !7, size: 64)
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!38 = !{!39}
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!39 = !DILocalVariable(name: "c", arg: 1, scope: !34, file: !3, line: 3, type: !37)
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!42 = !DILocation(line: 3, scope: !34)
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