1; RUN: llc -start-after=codegenprepare -stop-before expand-isel-pseudos -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 debug-use [[REG2]], debug-use $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32) 69; CHECK-NEXT: DBG_VALUE debug-use [[REG3]], debug-use $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32) 70; CHECK-NEXT: DBG_VALUE debug-use [[REG4]], debug-use $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 0, 32) 71; CHECK-NEXT: DBG_VALUE debug-use [[REG5]], debug-use $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 32, 32) 72; CHECK-NEXT: DBG_VALUE debug-use [[REG6]], debug-use $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 0, 32) 73; CHECK-NEXT: DBG_VALUE debug-use [[REG7]], debug-use $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