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https://github.com/RPCS3/llvm-mirror.git
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0eee52640f
This patch implements PR31013 by introducing a
DIGlobalVariableExpression that holds a pair of DIGlobalVariable and
DIExpression.
Currently, DIGlobalVariables holds a DIExpression. This is not the
best way to model this:
(1) The DIGlobalVariable should describe the source level variable,
not how to get to its location.
(2) It makes it unsafe/hard to update the expressions when we call
replaceExpression on the DIGLobalVariable.
(3) It makes it impossible to represent a global variable that is in
more than one location (e.g., a variable with multiple
DW_OP_LLVM_fragment-s). We also moved away from attaching the
DIExpression to DILocalVariable for the same reasons.
<rdar://problem/29250149>
https://llvm.org/bugs/show_bug.cgi?id=31013
Differential Revision: https://reviews.llvm.org/D26769
llvm-svn: 289902
104 lines
5.5 KiB
LLVM
104 lines
5.5 KiB
LLVM
; RUN: llc -filetype=obj -o - < %s | llvm-dwarfdump - | FileCheck %s
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;
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; Created using clang -g -O3 from:
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; struct S0 {
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; short f0;
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; int f3;
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; } a;
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; void fn1(short p1) {
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; struct S0 b, c = {3};
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; b.f3 = p1;
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; a = b = c;
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; }
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;
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; int main() { return 0; }
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;
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; This is similar to the bug in test/DebugInfo/ARM/PR26163.ll, except that there is an
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; extra non-overlapping range first. Thus, we make sure that the backend actually looks
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; at all expressions when determining whether to merge ranges, not just the first one.
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; AS in 26163, we expect two ranges (as opposed to one), the first one being zero sized
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;
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;
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; CHECK: 0x00000025: Beginning address offset: 0x0000000000000004
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; CHECK: Ending address offset: 0x0000000000000004
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; CHECK: Location description: 10 03 93 04 55 93 02
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; constu 0x00000003, piece 0x00000004, rdi, piece 0x00000002
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; CHECK: Beginning address offset: 0x0000000000000004
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; CHECK: Ending address offset: 0x0000000000000014
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; CHECK: Location description: 10 03 93 04 10 00
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; constu 0x00000003, piece 0x00000004, constu 0x00000000, piece 0x00000004
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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%struct.S0 = type { i16, i32 }
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@a = common global %struct.S0 zeroinitializer, align 4, !dbg !21
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
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; The attributes are here to force the zero-sized range not to be at the start of
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; the function, which has special interpretation in DWARF. The fact that this happens
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; at all is probably an LLVM bug.
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attributes #0 = { "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
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define void @fn1(i16 signext %p1) #0 !dbg !4 {
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entry:
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tail call void @llvm.dbg.value(metadata i16 %p1, i64 0, metadata !9, metadata !26), !dbg !27
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tail call void @llvm.dbg.declare(metadata %struct.S0* undef, metadata !10, metadata !26), !dbg !28
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tail call void @llvm.dbg.declare(metadata %struct.S0* undef, metadata !16, metadata !26), !dbg !29
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tail call void @llvm.dbg.value(metadata i32 3, i64 0, metadata !16, metadata !30), !dbg !29
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tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !16, metadata !31), !dbg !29
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tail call void @llvm.dbg.value(metadata i16 %p1, i64 0, metadata !10, metadata !32), !dbg !28
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tail call void @llvm.dbg.value(metadata i32 3, i64 0, metadata !10, metadata !30), !dbg !28
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tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !10, metadata !31), !dbg !28
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store i32 3, i32* bitcast (%struct.S0* @a to i32*), align 4, !dbg !33
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store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @a, i64 0, i32 1), align 4, !dbg !33
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ret void, !dbg !34
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}
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define i32 @main() !dbg !17 {
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entry:
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ret i32 0, !dbg !35
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!22, !23, !24}
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!llvm.ident = !{!25}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (https://github.com/llvm-mirror/clang 8f258397c5afd7a708bd95770c718e81d08fb11a) (https://github.com/llvm-mirror/llvm 18481855bdfa1b4a424f81be8525db002671348d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !20)
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!1 = !DIFile(filename: "small.c", directory: "/Users/kfischer/Projects/clangbug")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !8)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null, !7}
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!7 = !DIBasicType(name: "short", size: 16, align: 16, encoding: DW_ATE_signed)
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!8 = !{!9, !10, !16}
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!9 = !DILocalVariable(name: "p1", arg: 1, scope: !4, file: !1, line: 5, type: !7)
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!10 = !DILocalVariable(name: "b", scope: !4, file: !1, line: 6, type: !11)
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!11 = !DICompositeType(tag: DW_TAG_structure_type, name: "S0", file: !1, line: 1, size: 64, align: 32, elements: !12)
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!12 = !{!13, !14}
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!13 = !DIDerivedType(tag: DW_TAG_member, name: "f0", scope: !11, file: !1, line: 2, baseType: !7, size: 16, align: 16)
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!14 = !DIDerivedType(tag: DW_TAG_member, name: "f3", scope: !11, file: !1, line: 3, baseType: !15, size: 32, align: 32, offset: 32)
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!15 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!16 = !DILocalVariable(name: "c", scope: !4, file: !1, line: 6, type: !11)
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!17 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 11, type: !18, isLocal: false, isDefinition: true, scopeLine: 11, isOptimized: true, unit: !0, variables: !2)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!15}
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!20 = !{!21}
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!21 = !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "a", scope: !0, file: !1, line: 4, type: !11, isLocal: false, isDefinition: true))
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!22 = !{i32 2, !"Dwarf Version", i32 2}
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!23 = !{i32 2, !"Debug Info Version", i32 3}
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!24 = !{i32 1, !"PIC Level", i32 2}
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!25 = !{!"clang version 3.9.0 (https://github.com/llvm-mirror/clang 8f258397c5afd7a708bd95770c718e81d08fb11a) (https://github.com/llvm-mirror/llvm 18481855bdfa1b4a424f81be8525db002671348d)"}
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!26 = !DIExpression()
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!27 = !DILocation(line: 5, column: 16, scope: !4)
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!28 = !DILocation(line: 6, column: 13, scope: !4)
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!29 = !DILocation(line: 6, column: 16, scope: !4)
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!30 = !DIExpression(DW_OP_LLVM_fragment, 0, 32)
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!31 = !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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!32 = !DIExpression(DW_OP_LLVM_fragment, 32, 16)
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!33 = !DILocation(line: 8, column: 9, scope: !4)
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!34 = !DILocation(line: 9, column: 1, scope: !4)
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!35 = !DILocation(line: 11, column: 14, scope: !17)
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