xref: /llvm-project/llvm/test/DebugInfo/Generic/assignment-tracking/instcombine/sink-store.ll (revision 094572701dce4aaf36f4521d6cf750420d39f206) 
1; RUN: opt %s -S -passes=instcombine | FileCheck %s
2; RUN: opt --try-experimental-debuginfo-iterators %s -S -passes=instcombine | FileCheck %s
3
4;; Check that instcombine merges the DIAssignID metadata when merging two
5;; stores into a successor. Filecheck directives inline.
6;;
7;; Generated from the following source:
8;; int c;
9;; void esc(int*);
10;; int get();
11;; void fun() {
12;;   int local;
13;;   if (c) {
14;;     get();
15;;     local = 2;
16;;   } else {
17;;     local = 2;
18;;   }
19;;   esc(&local);
20;; }
21
22; CHECK: if.then:
23; CHECK-NEXT: %call = call
24; CHECK-NEXT: #dbg_assign(i32 2, ![[LOCAL:[0-9]+]], !DIExpression(), ![[MERGED_ID:[0-9]+]], ptr %local, !DIExpression(),
25
26; CHECK: if.else:
27; CHECK-NEXT: #dbg_assign(i32 2, ![[LOCAL]], !DIExpression(), ![[MERGED_ID]], ptr %local, !DIExpression(),
28
29; CHECK: if.end:
30; CHECK-NEXT: store i32 2, ptr %local{{.*}}!DIAssignID ![[MERGED_ID]]
31
32; CHECK: ![[LOCAL]] = !DILocalVariable(name: "local",
33
34@c = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
35
36; Function Attrs: uwtable mustprogress
37define dso_local void @_Z3funv() local_unnamed_addr !dbg !11 {
38entry:
39  %local = alloca i32, align 4
40  %0 = bitcast ptr %local to ptr, !dbg !16
41  call void @llvm.lifetime.start.p0(i64 4, ptr %0), !dbg !16
42  %1 = load i32, ptr @c, align 4, !dbg !17
43  %tobool = icmp ne i32 %1, 0, !dbg !17
44  br i1 %tobool, label %if.then, label %if.else, !dbg !23
45
46if.then:                                          ; preds = %entry
47  %call = call i32 @_Z3getv(), !dbg !24
48  store i32 2, ptr %local, align 4, !dbg !26, !DIAssignID !27
49  call void @llvm.dbg.assign(metadata i32 2, metadata !15, metadata !DIExpression(), metadata !27, metadata ptr %local, metadata !DIExpression()), !dbg !26
50  br label %if.end, !dbg !28
51
52if.else:                                          ; preds = %entry
53  store i32 2, ptr %local, align 4, !dbg !29, !DIAssignID !31
54  call void @llvm.dbg.assign(metadata i32 2, metadata !15, metadata !DIExpression(), metadata !31, metadata ptr %local, metadata !DIExpression()), !dbg !29
55  br label %if.end
56
57if.end:                                           ; preds = %if.else, %if.then
58  call void @_Z3escPi(ptr %local), !dbg !32
59  call void @llvm.lifetime.end.p0(i64 4, ptr %0), !dbg !33
60  ret void, !dbg !33
61}
62
63declare !dbg !34 dso_local i32 @_Z3getv() local_unnamed_addr
64declare !dbg !37 dso_local void @_Z3escPi(ptr) local_unnamed_addr
65declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
66declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
67declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
68
69!llvm.dbg.cu = !{!2}
70!llvm.module.flags = !{!7, !8, !9, !1000}
71!llvm.ident = !{!10}
72
73!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
74!1 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
75!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
76!3 = !DIFile(filename: "test.cpp", directory: "/")
77!4 = !{}
78!5 = !{!0}
79!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
80!7 = !{i32 7, !"Dwarf Version", i32 4}
81!8 = !{i32 2, !"Debug Info Version", i32 3}
82!9 = !{i32 1, !"wchar_size", i32 4}
83!10 = !{!"clang version 12.0.0"}
84!11 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funv", scope: !3, file: !3, line: 4, type: !12, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !14)
85!12 = !DISubroutineType(types: !13)
86!13 = !{null}
87!14 = !{!15}
88!15 = !DILocalVariable(name: "local", scope: !11, file: !3, line: 5, type: !6)
89!16 = !DILocation(line: 5, column: 3, scope: !11)
90!17 = !DILocation(line: 6, column: 7, scope: !18)
91!18 = distinct !DILexicalBlock(scope: !11, file: !3, line: 6, column: 7)
92!23 = !DILocation(line: 6, column: 7, scope: !11)
93!24 = !DILocation(line: 7, column: 5, scope: !25)
94!25 = distinct !DILexicalBlock(scope: !18, file: !3, line: 6, column: 10)
95!26 = !DILocation(line: 8, column: 11, scope: !25)
96!27 = distinct !DIAssignID()
97!28 = !DILocation(line: 9, column: 3, scope: !25)
98!29 = !DILocation(line: 10, column: 11, scope: !30)
99!30 = distinct !DILexicalBlock(scope: !18, file: !3, line: 9, column: 10)
100!31 = distinct !DIAssignID()
101!32 = !DILocation(line: 12, column: 3, scope: !11)
102!33 = !DILocation(line: 13, column: 1, scope: !11)
103!34 = !DISubprogram(name: "get", linkageName: "_Z3getv", scope: !3, file: !3, line: 3, type: !35, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)
104!35 = !DISubroutineType(types: !36)
105!36 = !{!6}
106!37 = !DISubprogram(name: "esc", linkageName: "_Z3escPi", scope: !3, file: !3, line: 2, type: !38, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)
107!38 = !DISubroutineType(types: !39)
108!39 = !{null, !40}
109!40 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !6, size: 64)
110!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
111