xref: /llvm-project/llvm/test/DebugInfo/Generic/assignment-tracking/mldst-motion/diamond.ll (revision 094572701dce4aaf36f4521d6cf750420d39f206)
1; RUN: opt -passes=mldst-motion -S %s -o - \
2; RUN: | FileCheck %s
3; RUN: opt --try-experimental-debuginfo-iterators -passes=mldst-motion -S %s -o - \
4; RUN: | FileCheck %s
5
6;; $ cat test.cpp
7;; int cond;
8;; void esc(int*);
9;; void fun() {
10;;   int a[4];
11;;   if (cond)
12;;     a[1] = 1;
13;;   else
14;;     a[1] = 2;
15;;   esc(a);
16;; }
17;;
18;;
19;; mldst-motion will merge and sink the stores in if.then and if.else into
20;; if.end. Ensure the merged store has a DIAssignID linking it to the two
21;; dbg.assign intrinsics which have been left in their original blocks.
22
23; CHECK: if.then:
24; CHECK-NEXT: #dbg_assign(i32 1,{{.+}}, !DIExpression(DW_OP_LLVM_fragment, 32, 32), ![[ID:[0-9]+]], ptr %1, !DIExpression(),
25
26; CHECK: if.else:
27; CHECK-NEXT: #dbg_assign(i32 2,{{.+}}, !DIExpression(DW_OP_LLVM_fragment, 32, 32), ![[ID]], ptr %1, !DIExpression(),
28
29; CHECK: if.end:
30; CHECK: store i32 %.sink, ptr %1, align 4{{.+}}, !DIAssignID ![[ID]]
31
32@cond = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
33
34define dso_local void @_Z3funv() !dbg !11 {
35entry:
36  %a = alloca [4 x i32], align 16, !DIAssignID !19
37  call void @llvm.dbg.assign(metadata i1 undef, metadata !15, metadata !DIExpression(), metadata !19, metadata ptr %a, metadata !DIExpression()), !dbg !20
38  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %a) #4, !dbg !21
39  %0 = load i32, ptr @cond, align 4, !dbg !22
40  %tobool.not = icmp eq i32 %0, 0, !dbg !22
41  br i1 %tobool.not, label %if.else, label %if.then, !dbg !28
42
43if.then:                                          ; preds = %entry
44  %arrayidx = getelementptr inbounds [4 x i32], ptr %a, i64 0, i64 1, !dbg !29
45  store i32 1, ptr %arrayidx, align 4, !dbg !30, !DIAssignID !31
46  call void @llvm.dbg.assign(metadata i32 1, metadata !15, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32), metadata !31, metadata ptr %arrayidx, metadata !DIExpression()), !dbg !20
47  br label %if.end, !dbg !29
48
49if.else:                                          ; preds = %entry
50  %arrayidx1 = getelementptr inbounds [4 x i32], ptr %a, i64 0, i64 1, !dbg !32
51  store i32 2, ptr %arrayidx1, align 4, !dbg !33, !DIAssignID !34
52  call void @llvm.dbg.assign(metadata i32 2, metadata !15, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32), metadata !34, metadata ptr %arrayidx1, metadata !DIExpression()), !dbg !20
53  br label %if.end
54
55if.end:                                           ; preds = %if.else, %if.then
56  %arraydecay = getelementptr inbounds [4 x i32], ptr %a, i64 0, i64 0, !dbg !35
57  call void @_Z3escPi(ptr noundef nonnull %arraydecay), !dbg !36
58  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %a) #4, !dbg !37
59  ret void, !dbg !37
60}
61
62declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
63declare !dbg !38 dso_local void @_Z3escPi(ptr noundef)
64declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
65declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
66
67!llvm.dbg.cu = !{!2}
68!llvm.module.flags = !{!6, !7, !8, !9, !1000}
69!llvm.ident = !{!10}
70
71!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
72!1 = distinct !DIGlobalVariable(name: "cond", scope: !2, file: !3, line: 1, type: !5, isLocal: false, isDefinition: true)
73!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, nameTableKind: None)
74!3 = !DIFile(filename: "test.cpp", directory: "/")
75!4 = !{!0}
76!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
77!6 = !{i32 7, !"Dwarf Version", i32 5}
78!7 = !{i32 2, !"Debug Info Version", i32 3}
79!8 = !{i32 1, !"wchar_size", i32 4}
80!9 = !{i32 7, !"uwtable", i32 1}
81!10 = !{!"clang version 14.0.0"}
82!11 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funv", scope: !3, file: !3, line: 3, type: !12, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !14)
83!12 = !DISubroutineType(types: !13)
84!13 = !{null}
85!14 = !{!15}
86!15 = !DILocalVariable(name: "a", scope: !11, file: !3, line: 4, type: !16)
87!16 = !DICompositeType(tag: DW_TAG_array_type, baseType: !5, size: 128, elements: !17)
88!17 = !{!18}
89!18 = !DISubrange(count: 4)
90!19 = distinct !DIAssignID()
91!20 = !DILocation(line: 0, scope: !11)
92!21 = !DILocation(line: 4, column: 3, scope: !11)
93!22 = !DILocation(line: 5, column: 7, scope: !23)
94!23 = distinct !DILexicalBlock(scope: !11, file: !3, line: 5, column: 7)
95!28 = !DILocation(line: 5, column: 7, scope: !11)
96!29 = !DILocation(line: 6, column: 5, scope: !23)
97!30 = !DILocation(line: 6, column: 10, scope: !23)
98!31 = distinct !DIAssignID()
99!32 = !DILocation(line: 8, column: 5, scope: !23)
100!33 = !DILocation(line: 8, column: 10, scope: !23)
101!34 = distinct !DIAssignID()
102!35 = !DILocation(line: 9, column: 7, scope: !11)
103!36 = !DILocation(line: 9, column: 3, scope: !11)
104!37 = !DILocation(line: 10, column: 1, scope: !11)
105!38 = !DISubprogram(name: "esc", linkageName: "_Z3escPi", scope: !3, file: !3, line: 2, type: !39, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !42)
106!39 = !DISubroutineType(types: !40)
107!40 = !{null, !41}
108!41 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
109!42 = !{}
110!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
111