1 ; RUN: llc -dwarf-version=4 -filetype=obj -O0 \
2 ; RUN: -mtriple=x86_64-unknown-linux-gnu < %s \
3 ; RUN: | llvm-dwarfdump -v - | FileCheck %s
5 ; Verify that the empty DW_OP_piece operations that are created for the
6 ; optimized-out struct fields `foo' and `baz' are emitted before their
7 ; succeeding fields' symbol location expressions.
9 ; Test file based on foo.c:
22 ; var.bar = var.qux = ptr;
26 ; which was built using:
28 ; clang -O0 -g2 -S -emit-llvm foo.c -o foo.ll
29 ; opt -S -globalopt foo.ll -o foo.opt.ll
31 ; CHECK: DW_AT_name {{.*}}"var"
32 ; CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_piece 0x8, DW_OP_addr 0x0, DW_OP_piece 0x8, DW_OP_piece 0x8, DW_OP_addr 0x0, DW_OP_piece 0x8)
34 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
35 target triple = "x86_64-unknown-linux-gnu"
37 @var.1 = internal unnamed_addr global i8* null, align 8, !dbg !0
38 @var.3 = internal unnamed_addr global i8* null, align 8, !dbg !15
41 !llvm.module.flags = !{!16, !17}
44 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression(DW_OP_LLVM_fragment, 64, 64))
45 !1 = distinct !DIGlobalVariable(name: "var", scope: !2, file: !3, line: 15, type: !7, isLocal: true, isDefinition: true)
46 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
47 !3 = !DIFile(filename: "foo.c", directory: "/")
50 !6 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
51 !7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 10, size: 256, elements: !8)
52 !8 = !{!9, !11, !13, !14}
53 !9 = !DIDerivedType(tag: DW_TAG_member, name: "foo", scope: !7, file: !3, line: 11, baseType: !10, size: 64)
54 !10 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
55 !11 = !DIDerivedType(tag: DW_TAG_member, name: "bar", scope: !7, file: !3, line: 12, baseType: !12, size: 64, offset: 64)
56 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
57 !13 = !DIDerivedType(tag: DW_TAG_member, name: "baz", scope: !7, file: !3, line: 13, baseType: !10, size: 64, offset: 128)
58 !14 = !DIDerivedType(tag: DW_TAG_member, name: "qux", scope: !7, file: !3, line: 14, baseType: !12, size: 64, offset: 192)
59 !15 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression(DW_OP_LLVM_fragment, 192, 64))
60 !16 = !{i32 2, !"Dwarf Version", i32 4}
61 !17 = !{i32 2, !"Debug Info Version", i32 3}
62 !18 = !{!"clang version 7.0.0"}