mirror of
https://github.com/RPCS3/llvm.git
synced 2026-08-28 05:10:05 -04:00
Adrian Prantl
69e607f200
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312144 91177308-0d34-0410-b5e6-96231b3b80d8
114 lines
4.5 KiB
LLVM
114 lines
4.5 KiB
LLVM
; REQUIRES: object-emission
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; Check that when variables are allocated on the stack we generate debug locations
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; for the stack location directly instead of generating a register+offset indirection.
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; RUN: llc -O2 -filetype=obj -disable-post-ra -mtriple=x86_64-unknown-linux-gnu < %s \
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; RUN: | llvm-dwarfdump - | FileCheck %s
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;
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; int data = 17;
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; int sum = 0;
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; int zero = 0;
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; int *ptr;
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;
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; extern void foo(int i, int *p);
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;
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; int main()
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; {
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; int val;
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; val = data;
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; foo(1, &val);
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; foo(2, &data);
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; return zero;
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; }
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;
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; CHECK: .debug_info contents
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: NULL
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; CHECK: DW_TAG_variable
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; CHECK: DW_AT_location [DW_FORM_sec_offset] ({{.*}}
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; CHECK-NEXT: {{0x.*}} - {{0x.*}}: DW_OP_reg0 RAX
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; CHECK-NEXT: {{0x.*}} - {{0x.*}}: DW_OP_breg7 RSP+4, DW_OP_deref)
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; CHECK-NEXT: DW_AT_name {{.*}}"val"
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; ModuleID = 'frame.c'
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source_filename = "frame.c"
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@data = global i32 17, align 4, !dbg !0
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@sum = local_unnamed_addr global i32 0, align 4, !dbg !6
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@zero = local_unnamed_addr global i32 0, align 4, !dbg !9
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@ptr = common local_unnamed_addr global i32* null, align 8, !dbg !11
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define i32 @main() local_unnamed_addr !dbg !17 {
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entry:
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%val = alloca i32, align 4
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%0 = bitcast i32* %val to i8*, !dbg !22
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call void @llvm.lifetime.start(i64 4, i8* %0), !dbg !22
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%1 = load i32, i32* @data, align 4, !dbg !23, !tbaa !24
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tail call void @llvm.dbg.value(metadata i32 %1, metadata !21, metadata !28), !dbg !29
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store i32 %1, i32* %val, align 4, !dbg !30, !tbaa !24
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tail call void @llvm.dbg.value(metadata i32* %val, metadata !21, metadata !31), !dbg !29
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call void @foo(i32 1, i32* nonnull %val), !dbg !32
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call void @foo(i32 2, i32* nonnull @data), !dbg !33
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%2 = load i32, i32* @zero, align 4, !dbg !34, !tbaa !24
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call void @llvm.lifetime.end(i64 4, i8* %0), !dbg !35
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ret i32 %2, !dbg !36
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start(i64, i8* nocapture) #0
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declare void @foo(i32, i32*) local_unnamed_addr
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) #0
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { argmemonly nounwind }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!14, !15}
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!llvm.ident = !{!16}
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!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "data", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (trunk 273961)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "frame.c", directory: "/home/user/test")
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!4 = !{}
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!5 = !{!0, !6, !9, !11}
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!6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = !DIGlobalVariable(name: "sum", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = distinct !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
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!10 = !DIGlobalVariable(name: "zero", scope: !2, file: !3, line: 3, type: !8, isLocal: false, isDefinition: true)
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!11 = distinct !DIGlobalVariableExpression(var: !12, expr: !DIExpression())
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!12 = !DIGlobalVariable(name: "ptr", scope: !2, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true)
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!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64)
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!14 = !{i32 2, !"Dwarf Version", i32 4}
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!15 = !{i32 2, !"Debug Info Version", i32 3}
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!16 = !{!"clang version 3.9.0 (trunk 273961)"}
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!17 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 8, type: !18, isLocal: false, isDefinition: true, scopeLine: 9, isOptimized: true, unit: !2, variables: !20)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!8}
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!20 = !{!21}
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!21 = !DILocalVariable(name: "val", scope: !17, file: !3, line: 10, type: !8)
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!22 = !DILocation(line: 10, column: 3, scope: !17)
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!23 = !DILocation(line: 11, column: 9, scope: !17)
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!24 = !{!25, !25, i64 0}
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!25 = !{!"int", !26, i64 0}
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!26 = !{!"omnipotent char", !27, i64 0}
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!27 = !{!"Simple C/C++ TBAA"}
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!28 = !DIExpression()
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!29 = !DILocation(line: 10, column: 7, scope: !17)
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!30 = !DILocation(line: 11, column: 7, scope: !17)
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!31 = !DIExpression(DW_OP_deref)
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!32 = !DILocation(line: 12, column: 3, scope: !17)
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!33 = !DILocation(line: 13, column: 3, scope: !17)
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!34 = !DILocation(line: 14, column: 10, scope: !17)
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!35 = !DILocation(line: 15, column: 1, scope: !17)
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!36 = !DILocation(line: 14, column: 3, scope: !17)
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