1; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s | FileCheck %s
2
3; This test case was generated from the following phi-split.c program,
4; using: clang phi-split.c -g -O1 -S -o - --target=i386 -emit-llvm
5; --------------------------------------
6; long long end = 10;
7;
8; int main() {
9;   long long x = 9;
10;   long long y = 13;
11;   for (long long u = 0; u < end; ++u) {
12;     x += y;
13;     y = y * 3;
14;   }
15;
16;   volatile long long arr[80];
17;   for (long long q = 0; q < 64; ++q) {
18;     arr[q] = q + 3;
19;   }
20;
21;   return x;
22; }
23; --------------------------------------
24;
25
26; ModuleID = 'phi-split.c'
27source_filename = "phi-split.c"
28target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
29target triple = "i386"
30
31@end = dso_local local_unnamed_addr global i64 10, align 8, !dbg !0
32
33; Function Attrs: nounwind
34define dso_local i32 @main() local_unnamed_addr #0 !dbg !12 {
35; CHECK-LABEL: name:            main
36entry:
37  %arr = alloca [80 x i64], align 8
38  call void @llvm.dbg.value(metadata i64 9, metadata !17, metadata !DIExpression()), !dbg !28
39  call void @llvm.dbg.value(metadata i64 13, metadata !18, metadata !DIExpression()), !dbg !29
40  call void @llvm.dbg.value(metadata i64 0, metadata !19, metadata !DIExpression()), !dbg !30
41  %0 = load i64, i64* @end, align 8, !dbg !31
42  %cmp20 = icmp sgt i64 %0, 0, !dbg !37
43  br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !38
44
45for.body.lr.ph:                                   ; preds = %entry
46  %1 = load i64, i64* @end, align 8
47  br label %for.body, !dbg !38
48
49for.cond.cleanup.loopexit:                        ; preds = %for.body
50  %extract.t = trunc i64 %add to i32, !dbg !38
51  br label %for.cond.cleanup, !dbg !39
52
53for.cond.cleanup:                                 ; preds = %for.cond.cleanup.loopexit, %entry
54  %x.0.lcssa.off0 = phi i32 [ 9, %entry ], [ %extract.t, %for.cond.cleanup.loopexit ]
55  call void @llvm.dbg.value(metadata i64 undef, metadata !17, metadata !DIExpression()), !dbg !28
56  %2 = bitcast [80 x i64]* %arr to i8*, !dbg !39
57  call void @llvm.dbg.value(metadata i64 0, metadata !26, metadata !DIExpression()), !dbg !41
58  br label %for.body4, !dbg !42
59
60for.body:                                         ; preds = %for.body.lr.ph, %for.body
61; CHECK-LABEL: bb.{{.*}}.for.body:
62; CHECK:      [[REG2:%[0-9]+]]:gr32 = PHI
63; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
64; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI
65; CHECK-NEXT: [[REG5:%[0-9]+]]:gr32_nosp = PHI
66; CHECK-NEXT: [[REG6:%[0-9]+]]:gr32 = PHI
67; CHECK-NEXT: [[REG7:%[0-9]+]]:gr32 = PHI
68; CHECK-NEXT: DBG_VALUE [[REG2]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
69; CHECK-NEXT: DBG_VALUE [[REG3]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
70; CHECK-NEXT: DBG_VALUE [[REG4]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
71; CHECK-NEXT: DBG_VALUE [[REG5]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
72; CHECK-NEXT: DBG_VALUE [[REG6]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
73; CHECK-NEXT: DBG_VALUE [[REG7]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
74  %u.023 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
75  %y.022 = phi i64 [ 13, %for.body.lr.ph ], [ %mul, %for.body ]
76  %x.021 = phi i64 [ 9, %for.body.lr.ph ], [ %add, %for.body ]
77  call void @llvm.dbg.value(metadata i64 %u.023, metadata !19, metadata !DIExpression()), !dbg !30
78  call void @llvm.dbg.value(metadata i64 %y.022, metadata !18, metadata !DIExpression()), !dbg !29
79  call void @llvm.dbg.value(metadata i64 %x.021, metadata !17, metadata !DIExpression()), !dbg !28
80  %add = add nuw nsw i64 %y.022, %x.021, !dbg !43
81  %mul = mul nsw i64 %y.022, 3, !dbg !45
82  %inc = add nuw nsw i64 %u.023, 1, !dbg !46
83  call void @llvm.dbg.value(metadata i64 %inc, metadata !19, metadata !DIExpression()), !dbg !30
84  call void @llvm.dbg.value(metadata i64 %mul, metadata !18, metadata !DIExpression()), !dbg !29
85  call void @llvm.dbg.value(metadata i64 %add, metadata !17, metadata !DIExpression()), !dbg !28
86  %cmp = icmp slt i64 %inc, %1, !dbg !37
87  br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !38, !llvm.loop !47
88
89for.cond.cleanup3:                                ; preds = %for.body4
90  ret i32 %x.0.lcssa.off0, !dbg !50
91
92for.body4:                                        ; preds = %for.cond.cleanup, %for.body4
93  %q.019 = phi i64 [ 0, %for.cond.cleanup ], [ %inc7, %for.body4 ]
94  call void @llvm.dbg.value(metadata i64 %q.019, metadata !26, metadata !DIExpression()), !dbg !41
95  %add5 = add nuw nsw i64 %q.019, 3, !dbg !51
96  %idxprom = trunc i64 %q.019 to i32, !dbg !54
97  %arrayidx = getelementptr inbounds [80 x i64], [80 x i64]* %arr, i32 0, i32 %idxprom, !dbg !54
98  store volatile i64 %add5, i64* %arrayidx, align 8, !dbg !55
99  %inc7 = add nuw nsw i64 %q.019, 1, !dbg !56
100  call void @llvm.dbg.value(metadata i64 %inc7, metadata !26, metadata !DIExpression()), !dbg !41
101  %cmp2 = icmp ult i64 %inc7, 64, !dbg !57
102  br i1 %cmp2, label %for.body4, label %for.cond.cleanup3, !dbg !42, !llvm.loop !58
103}
104
105; Function Attrs: nounwind readnone speculatable
106declare void @llvm.dbg.value(metadata, metadata, metadata) #1
107
108attributes #0 = { nounwind }
109attributes #1 = { nounwind readnone speculatable }
110
111!llvm.dbg.cu = !{!2}
112!llvm.module.flags = !{!7, !8, !9, !10}
113!llvm.ident = !{!11}
114
115!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
116!1 = distinct !DIGlobalVariable(name: "end", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
117!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)
118!3 = !DIFile(filename: "phi-split.c", directory: "")
119!4 = !{}
120!5 = !{!0}
121!6 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
122!7 = !{i32 1, !"NumRegisterParameters", i32 0}
123!8 = !{i32 2, !"Dwarf Version", i32 4}
124!9 = !{i32 2, !"Debug Info Version", i32 3}
125!10 = !{i32 1, !"wchar_size", i32 4}
126!11 = !{!"clang version 7.0.0  (x)"}
127!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !13, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !16)
128!13 = !DISubroutineType(types: !14)
129!14 = !{!15}
130!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
131!16 = !{!17, !18, !19, !21, !26}
132!17 = !DILocalVariable(name: "x", scope: !12, file: !3, line: 4, type: !6)
133!18 = !DILocalVariable(name: "y", scope: !12, file: !3, line: 5, type: !6)
134!19 = !DILocalVariable(name: "u", scope: !20, file: !3, line: 6, type: !6)
135!20 = distinct !DILexicalBlock(scope: !12, file: !3, line: 6, column: 3)
136!21 = !DILocalVariable(name: "arr", scope: !12, file: !3, line: 11, type: !22)
137!22 = !DICompositeType(tag: DW_TAG_array_type, baseType: !23, size: 5120, elements: !24)
138!23 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
139!24 = !{!25}
140!25 = !DISubrange(count: 80)
141!26 = !DILocalVariable(name: "q", scope: !27, file: !3, line: 12, type: !6)
142!27 = distinct !DILexicalBlock(scope: !12, file: !3, line: 12, column: 3)
143!28 = !DILocation(line: 4, column: 13, scope: !12)
144!29 = !DILocation(line: 5, column: 13, scope: !12)
145!30 = !DILocation(line: 6, column: 18, scope: !20)
146!31 = !DILocation(line: 6, column: 29, scope: !32)
147!32 = distinct !DILexicalBlock(scope: !20, file: !3, line: 6, column: 3)
148!37 = !DILocation(line: 6, column: 27, scope: !32)
149!38 = !DILocation(line: 6, column: 3, scope: !20)
150!39 = !DILocation(line: 11, column: 3, scope: !12)
151!40 = !DILocation(line: 11, column: 22, scope: !12)
152!41 = !DILocation(line: 12, column: 18, scope: !27)
153!42 = !DILocation(line: 12, column: 3, scope: !27)
154!43 = !DILocation(line: 7, column: 7, scope: !44)
155!44 = distinct !DILexicalBlock(scope: !32, file: !3, line: 6, column: 39)
156!45 = !DILocation(line: 8, column: 11, scope: !44)
157!46 = !DILocation(line: 6, column: 34, scope: !32)
158!47 = distinct !{!47, !38, !48}
159!48 = !DILocation(line: 9, column: 3, scope: !20)
160!50 = !DILocation(line: 16, column: 3, scope: !12)
161!51 = !DILocation(line: 13, column: 16, scope: !52)
162!52 = distinct !DILexicalBlock(scope: !53, file: !3, line: 12, column: 38)
163!53 = distinct !DILexicalBlock(scope: !27, file: !3, line: 12, column: 3)
164!54 = !DILocation(line: 13, column: 5, scope: !52)
165!55 = !DILocation(line: 13, column: 12, scope: !52)
166!56 = !DILocation(line: 12, column: 33, scope: !53)
167!57 = !DILocation(line: 12, column: 27, scope: !53)
168!58 = distinct !{!58, !42, !59}
169!59 = !DILocation(line: 14, column: 3, scope: !27)
170