1 ; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s | FileCheck %s
3 ; This test case was generated from the following debug.c program,
4 ; using: clang debug.c -g -O1 -S -o dbg_value_phi_isel1.ll -emit-llvm
5 ; --------------------------------------
11 ; for (int u = 0; u < end; ++u) {
16 ; volatile int arr[80];
17 ; for (int q = 0; q < 64; ++q) {
23 ; --------------------------------------
26 ; ModuleID = 'debug.c'
27 source_filename = "debug.c"
28 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
29 target triple = "x86_64-unknown-linux-gnu"
31 @end = dso_local local_unnamed_addr global i32 10, align 4, !dbg !0
33 ; Function Attrs: nounwind uwtable
34 define dso_local i32 @main() local_unnamed_addr #0 !dbg !11 {
35 ; CHECK-LABEL: name: main
37 %arr = alloca [80 x i32], align 16
38 call void @llvm.dbg.value(metadata i32 9, metadata !15, metadata !DIExpression()), !dbg !26
39 call void @llvm.dbg.value(metadata i32 13, metadata !16, metadata !DIExpression()), !dbg !27
40 call void @llvm.dbg.value(metadata i32 0, metadata !17, metadata !DIExpression()), !dbg !28
41 %0 = load i32, i32* @end, align 4, !dbg !29, !tbaa !31
42 %cmp20 = icmp sgt i32 %0, 0, !dbg !35
43 br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !36
45 for.body.lr.ph: ; preds = %entry
46 %1 = load i32, i32* @end, align 4, !tbaa !31
47 br label %for.body, !dbg !36
49 for.cond.cleanup: ; preds = %for.body, %entry
50 ; CHECK-LABEL: bb.{{.*}}.for.cond.cleanup:
51 ; CHECK: [[REG1:%[0-9]+]]:gr32 = PHI
52 ; CHECK-NEXT: DBG_VALUE [[REG1]]
53 %x.0.lcssa = phi i32 [ 9, %entry ], [ %add, %for.body ]
54 call void @llvm.dbg.value(metadata i32 %x.0.lcssa, metadata !15, metadata !DIExpression()), !dbg !26
55 %2 = bitcast [80 x i32]* %arr to i8*, !dbg !37
56 call void @llvm.lifetime.start.p0i8(i64 320, i8* nonnull %2) #3, !dbg !37
57 call void @llvm.dbg.declare(metadata [80 x i32]* %arr, metadata !19, metadata !DIExpression()), !dbg !38
58 call void @llvm.dbg.value(metadata i32 0, metadata !24, metadata !DIExpression()), !dbg !39
59 br label %for.body4, !dbg !40
61 for.body: ; preds = %for.body.lr.ph, %for.body
62 ; CHECK-LABEL: bb.{{.*}}.for.body:
63 ; CHECK: [[REG2:%[0-9]+]]:gr32 = PHI
64 ; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
65 ; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI
66 ; CHECK-NEXT: DBG_VALUE [[REG2]]
67 ; CHECK-NEXT: DBG_VALUE [[REG3]]
68 ; CHECK-NEXT: DBG_VALUE [[REG4]]
69 %u.023 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
70 %y.022 = phi i32 [ 13, %for.body.lr.ph ], [ %mul, %for.body ]
71 %x.021 = phi i32 [ 9, %for.body.lr.ph ], [ %add, %for.body ]
72 call void @llvm.dbg.value(metadata i32 %u.023, metadata !17, metadata !DIExpression()), !dbg !28
73 call void @llvm.dbg.value(metadata i32 %y.022, metadata !16, metadata !DIExpression()), !dbg !27
74 call void @llvm.dbg.value(metadata i32 %x.021, metadata !15, metadata !DIExpression()), !dbg !26
75 %add = add nuw nsw i32 %y.022, %x.021, !dbg !41
76 %mul = mul nsw i32 %y.022, 3, !dbg !43
77 %inc = add nuw nsw i32 %u.023, 1, !dbg !44
78 call void @llvm.dbg.value(metadata i32 %inc, metadata !17, metadata !DIExpression()), !dbg !28
79 call void @llvm.dbg.value(metadata i32 %mul, metadata !16, metadata !DIExpression()), !dbg !27
80 call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !26
81 %cmp = icmp slt i32 %inc, %1, !dbg !35
82 br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !36, !llvm.loop !45
84 for.cond.cleanup3: ; preds = %for.body4
85 call void @llvm.lifetime.end.p0i8(i64 320, i8* nonnull %2) #3, !dbg !47
86 ret i32 %x.0.lcssa, !dbg !48
88 for.body4: ; preds = %for.body4, %for.cond.cleanup
89 %indvars.iv = phi i64 [ 0, %for.cond.cleanup ], [ %indvars.iv.next, %for.body4 ]
90 call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !24, metadata !DIExpression()), !dbg !39
91 %arrayidx = getelementptr inbounds [80 x i32], [80 x i32]* %arr, i64 0, i64 %indvars.iv, !dbg !49
92 %3 = trunc i64 %indvars.iv to i32, !dbg !52
93 %4 = add i32 %3, 3, !dbg !52
94 store volatile i32 %4, i32* %arrayidx, align 4, !dbg !52, !tbaa !31
95 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !53
96 call void @llvm.dbg.value(metadata i32 undef, metadata !24, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !39
97 %exitcond = icmp eq i64 %indvars.iv.next, 64, !dbg !54
98 br i1 %exitcond, label %for.cond.cleanup3, label %for.body4, !dbg !40, !llvm.loop !55
101 ; Function Attrs: argmemonly nounwind
102 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
104 ; Function Attrs: nounwind readnone speculatable
105 declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
107 ; Function Attrs: argmemonly nounwind
108 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
110 ; Function Attrs: nounwind readnone speculatable
111 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
113 attributes #0 = { nounwind uwtable }
114 attributes #1 = { argmemonly nounwind }
115 attributes #2 = { nounwind readnone speculatable }
116 attributes #3 = { nounwind }
119 !llvm.module.flags = !{!7, !8, !9}
122 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
123 !1 = distinct !DIGlobalVariable(name: "end", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
124 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (x)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
125 !3 = !DIFile(filename: "debug.c", directory: "")
128 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
129 !7 = !{i32 2, !"Dwarf Version", i32 4}
130 !8 = !{i32 2, !"Debug Info Version", i32 3}
131 !9 = !{i32 1, !"wchar_size", i32 4}
132 !10 = !{!"clang version 7.0.0 (x)"}
133 !11 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !14)
134 !12 = !DISubroutineType(types: !13)
136 !14 = !{!15, !16, !17, !19, !24}
137 !15 = !DILocalVariable(name: "x", scope: !11, file: !3, line: 4, type: !6)
138 !16 = !DILocalVariable(name: "y", scope: !11, file: !3, line: 5, type: !6)
139 !17 = !DILocalVariable(name: "u", scope: !18, file: !3, line: 6, type: !6)
140 !18 = distinct !DILexicalBlock(scope: !11, file: !3, line: 6, column: 3)
141 !19 = !DILocalVariable(name: "arr", scope: !11, file: !3, line: 11, type: !20)
142 !20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !21, size: 2560, elements: !22)
143 !21 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
145 !23 = !DISubrange(count: 80)
146 !24 = !DILocalVariable(name: "q", scope: !25, file: !3, line: 12, type: !6)
147 !25 = distinct !DILexicalBlock(scope: !11, file: !3, line: 12, column: 3)
148 !26 = !DILocation(line: 4, column: 7, scope: !11)
149 !27 = !DILocation(line: 5, column: 7, scope: !11)
150 !28 = !DILocation(line: 6, column: 12, scope: !18)
151 !29 = !DILocation(line: 6, column: 23, scope: !30)
152 !30 = distinct !DILexicalBlock(scope: !18, file: !3, line: 6, column: 3)
153 !31 = !{!32, !32, i64 0}
154 !32 = !{!"int", !33, i64 0}
155 !33 = !{!"omnipotent char", !34, i64 0}
156 !34 = !{!"Simple C/C++ TBAA"}
157 !35 = !DILocation(line: 6, column: 21, scope: !30)
158 !36 = !DILocation(line: 6, column: 3, scope: !18)
159 !37 = !DILocation(line: 11, column: 3, scope: !11)
160 !38 = !DILocation(line: 11, column: 16, scope: !11)
161 !39 = !DILocation(line: 12, column: 12, scope: !25)
162 !40 = !DILocation(line: 12, column: 3, scope: !25)
163 !41 = !DILocation(line: 7, column: 7, scope: !42)
164 !42 = distinct !DILexicalBlock(scope: !30, file: !3, line: 6, column: 33)
165 !43 = !DILocation(line: 8, column: 11, scope: !42)
166 !44 = !DILocation(line: 6, column: 28, scope: !30)
167 !45 = distinct !{!45, !36, !46}
168 !46 = !DILocation(line: 9, column: 3, scope: !18)
169 !47 = !DILocation(line: 17, column: 1, scope: !11)
170 !48 = !DILocation(line: 16, column: 3, scope: !11)
171 !49 = !DILocation(line: 13, column: 5, scope: !50)
172 !50 = distinct !DILexicalBlock(scope: !51, file: !3, line: 12, column: 32)
173 !51 = distinct !DILexicalBlock(scope: !25, file: !3, line: 12, column: 3)
174 !52 = !DILocation(line: 13, column: 12, scope: !50)
175 !53 = !DILocation(line: 12, column: 27, scope: !51)
176 !54 = !DILocation(line: 12, column: 21, scope: !51)
177 !55 = distinct !{!55, !40, !56}
178 !56 = !DILocation(line: 14, column: 3, scope: !25)