xref: /llvm-project/llvm/test/DebugInfo/assignment-tracking/X86/lower-offset-expression.ll (revision 3a05e01d1a76984fe1532bd237edbbb7ed9db6ea) 
1; RUN: llc %s -stop-after=finalize-isel -o - \
2; RUN: | FileCheck %s
3
4
5; RUN: llc --try-experimental-debuginfo-iterators %s -stop-after=finalize-isel -o - \
6; RUN: | FileCheck %s
7
8;; Handwritten test.
9
10;; Here we have dbg.assign intrinsics with fragments (in the value-expression)
11;; and address-expressions that involve arithmetic. The generated DBG_VALUE
12;; intructions needs a DIExpression that:
13;;     a) Uses the fragment from the value-expression,
14;;     b) Uses the offset expression of the address-expression,
15;;     c) Has a DW_OP_deref appended.
16
17; CHECK: DBG_VALUE %stack.0.a, $noreg, {{.+}}, !DIExpression(DW_OP_plus_uconst, 8, DW_OP_deref, DW_OP_LLVM_fragment, 64, 32), debug-location
18
19target triple = "x86_64-unknown-linux-gnu"
20
21define dso_local void @fun() !dbg !7 {
22entry:
23  %a = alloca <4 x i32>, !DIAssignID !24
24  call void @llvm.dbg.assign(metadata i32 undef, metadata !16, metadata !DIExpression(), metadata !24, metadata ptr %a, metadata !DIExpression()), !dbg !34
25  ;; unlink and undef a dbg.assign to avoid using sidetable for var loc.
26  call void @llvm.dbg.assign(metadata i32 undef, metadata !16, metadata !DIExpression(), metadata !26, metadata ptr undef, metadata !DIExpression()), !dbg !34
27  %idx2 = getelementptr inbounds i32, ptr %a, i32 2
28  store i32 100, ptr %idx2, !DIAssignID !25
29  call void @llvm.dbg.assign(metadata i32 100, metadata !16, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 32), metadata !25, metadata ptr %a, metadata !DIExpression(DW_OP_plus_uconst, 8)), !dbg !34
30  ret void
31}
32
33declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
34
35!llvm.dbg.cu = !{!0}
36!llvm.module.flags = !{!3, !4, !5, !1000}
37!llvm.ident = !{!6}
38
39!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
40!1 = !DIFile(filename: "test.cpp", directory: "/")
41!2 = !{}
42!3 = !{i32 7, !"Dwarf Version", i32 4}
43!4 = !{i32 2, !"Debug Info Version", i32 3}
44!5 = !{i32 1, !"wchar_size", i32 4}
45!6 = !{!"clang version 12.0.0"}
46!7 = distinct !DISubprogram(name: "fun", linkageName: "fun", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
47!8 = !DISubroutineType(types: !9)
48!9 = !{null, !10, !10, !10, !10}
49!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
50!11 = !{!16}
51!16 = !DILocalVariable(name: "quad", scope: !7, file: !1, line: 4, type: !17)
52!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 128, elements: !18)
53!18 = !{!19}
54!19 = !DISubrange(count: 4)
55!23 = !DILocation(line: 0, scope: !7)
56!24 = distinct !DIAssignID()
57!25 = distinct !DIAssignID()
58!26 = distinct !DIAssignID()
59!34 = !DILocation(line: 0, column: 0, scope: !7)
60!44 = !{!45, !45, i64 0}
61!45 = !{!"float", !46, i64 0}
62!46 = !{!"omnipotent char", !47, i64 0}
63!47 = !{!"Simple C++ TBAA"}
64!48 = !DILocation(line: 11, column: 3, scope: !7)
65!49 = !DILocation(line: 12, column: 1, scope: !7)
66!50 = !DISubprogram(name: "get", linkageName: "_Z3getv", scope: !1, file: !1, line: 1, type: !51, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
67!51 = !DISubroutineType(types: !52)
68!52 = !{!10}
69!53 = !DISubprogram(name: "ext", linkageName: "_Z3extPf", scope: !1, file: !1, line: 2, type: !54, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
70!54 = !DISubroutineType(types: !55)
71!55 = !{!10, !56}
72!56 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
73
74!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
75