1; RUN: opt -S -loop-rotate < %s | FileCheck %s 2; RUN: opt -S -loop-rotate -enable-mssa-loop-dependency=true -verify-memoryssa < %s | FileCheck %s 3 4;CHECK-LABEL: func 5;CHECK-LABEL: entry 6;CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 %a 7;CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 1, metadata ![[I_VAR:[0-9]+]], metadata !DIExpression()) 8;CHECK-LABEL: for.body: 9;CHECK-NEXT: [[I:%.*]] = phi i32 [ 1, %entry ], [ %inc, %for.body ] 10;CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 [[I]], metadata ![[I_VAR]], metadata !DIExpression()) 11 12; CHECK: ![[I_VAR]] = !DILocalVariable(name: "i",{{.*}}) 13 14; Function Attrs: noinline nounwind 15define void @func(i32 %a) local_unnamed_addr #0 !dbg !6 { 16entry: 17 tail call void @llvm.dbg.value(metadata i32 %a, metadata !10, metadata !11), !dbg !12 18 tail call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !11), !dbg !15 19 br label %for.cond, !dbg !16 20 21for.cond: ; preds = %for.body, %entry 22 %i.0 = phi i32 [ 1, %entry ], [ %inc, %for.body ] 23 tail call void @llvm.dbg.value(metadata i32 %i.0, metadata !13, metadata !11), !dbg !15 24 %cmp = icmp slt i32 %i.0, 10, !dbg !17 25 br i1 %cmp, label %for.body, label %for.end, !dbg !20 26 27for.body: ; preds = %for.cond 28 %add = add nsw i32 %i.0, %a, !dbg !22 29 %call = tail call i32 @func2(i32 %i.0, i32 %add) #3, !dbg !24 30 %inc = add nsw i32 %i.0, 1, !dbg !25 31 tail call void @llvm.dbg.value(metadata i32 %inc, metadata !13, metadata !11), !dbg !15 32 br label %for.cond, !dbg !27, !llvm.loop !28 33 34for.end: ; preds = %for.cond 35 ret void, !dbg !31 36} 37 38declare i32 @func2(i32, i32) local_unnamed_addr 39 40; Function Attrs: nounwind readnone 41declare void @llvm.dbg.value(metadata, metadata, metadata) #2 42 43attributes #0 = { noinline nounwind } 44attributes #2 = { nounwind readnone } 45attributes #3 = { nounwind } 46 47!llvm.dbg.cu = !{!0} 48!llvm.module.flags = !{!3, !4} 49!llvm.ident = !{!5} 50 51!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 52!1 = !DIFile(filename: "debug-phi.c", directory: "/work/projects/src/tests/debug") 53!2 = !{} 54!3 = !{i32 2, !"Dwarf Version", i32 4} 55!4 = !{i32 2, !"Debug Info Version", i32 3} 56!5 = !{!"clang version 5.0.0"} 57!6 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 58!7 = !DISubroutineType(types: !8) 59!8 = !{null, !9} 60!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 61!10 = !DILocalVariable(name: "a", arg: 1, scope: !6, file: !1, line: 2, type: !9) 62!11 = !DIExpression() 63!12 = !DILocation(line: 2, column: 15, scope: !6) 64!13 = !DILocalVariable(name: "i", scope: !14, file: !1, line: 3, type: !9) 65!14 = distinct !DILexicalBlock(scope: !6, file: !1, line: 3, column: 3) 66!15 = !DILocation(line: 3, column: 11, scope: !14) 67!16 = !DILocation(line: 3, column: 7, scope: !14) 68!17 = !DILocation(line: 3, column: 20, scope: !18) 69!18 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 1) 70!19 = distinct !DILexicalBlock(scope: !14, file: !1, line: 3, column: 3) 71!20 = !DILocation(line: 3, column: 3, scope: !21) 72!21 = !DILexicalBlockFile(scope: !14, file: !1, discriminator: 1) 73!22 = !DILocation(line: 4, column: 15, scope: !23) 74!23 = distinct !DILexicalBlock(scope: !19, file: !1, line: 3, column: 31) 75!24 = !DILocation(line: 4, column: 5, scope: !23) 76!25 = !DILocation(line: 3, column: 27, scope: !26) 77!26 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 2) 78!27 = !DILocation(line: 3, column: 3, scope: !26) 79!28 = distinct !{!28, !29, !30} 80!29 = !DILocation(line: 3, column: 3, scope: !14) 81!30 = !DILocation(line: 5, column: 3, scope: !14) 82!31 = !DILocation(line: 6, column: 1, scope: !6) 83