1 ; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s | FileCheck %s
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 ; --------------------------------------
11 ; for (long long u = 0; u < end; ++u) {
16 ; volatile long long arr[80];
17 ; for (long long q = 0; q < 64; ++q) {
23 ; --------------------------------------
26 ; ModuleID = 'phi-split.c'
27 source_filename = "phi-split.c"
28 target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
29 target triple = "i386"
31 @end = dso_local local_unnamed_addr global i64 10, align 8, !dbg !0
33 ; Function Attrs: nounwind
34 define dso_local i32 @main() local_unnamed_addr #0 !dbg !12 {
35 ; CHECK-LABEL: name: main
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
45 for.body.lr.ph: ; preds = %entry
46 %1 = load i64, i64* @end, align 8
47 br label %for.body, !dbg !38
49 for.cond.cleanup.loopexit: ; preds = %for.body
50 %extract.t = trunc i64 %add to i32, !dbg !38
51 br label %for.cond.cleanup, !dbg !39
53 for.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
60 for.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
89 for.cond.cleanup3: ; preds = %for.body4
90 ret i32 %x.0.lcssa.off0, !dbg !50
92 for.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
105 ; Function Attrs: nounwind readnone speculatable
106 declare void @llvm.dbg.value(metadata, metadata, metadata) #1
108 attributes #0 = { nounwind }
109 attributes #1 = { nounwind readnone speculatable }
112 !llvm.module.flags = !{!7, !8, !9, !10}
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: "")
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)
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)
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)