1; RUN: opt %s -indvars -verify -S -o - | FileCheck %s 2 3; Hand-reduced from this example: 4; 5; #include <stdio.h> 6 7; int main( int argc, char **argv ) 8; { 9; for( int ArgIndex = 1; ArgIndex < argc; ArgIndex += 1 ) 10; { 11; printf("\n Argument %d: %s\n", ArgIndex, argv[ArgIndex] ); 12; } 13; } 14 15; clang++ -g -O -mllvm -disable-llvm-optzns -gno-column-info 16; opt -mem2reg -loop-rotate -scalar-evolution 17 18; CHECK: @main 19; CHECK: llvm.dbg.value(metadata i32 1, metadata [[METADATA_IDX1:![0-9]+]] 20; CHECK: %[[VAR_NAME:.*]] = add nuw nsw i64 21; CHECK: llvm.dbg.value(metadata i64 %[[VAR_NAME]], metadata [[METADATA_IDX1]], metadata !DIExpression()) 22; CHECK: DICompileUnit 23; CHECK: [[METADATA_IDX1]] = !DILocalVariable(name: "ArgIndex" 24 25source_filename = "test.cpp" 26target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 27target triple = "x86_64-unknown-linux-gnu" 28 29@.str = private unnamed_addr constant [20 x i8] c"\0A Argument %d: %s\0A\00", align 1 30 31define dso_local i32 @main(i32 %argc, i8** %argv) !dbg !7 { 32entry: 33 call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata !DIExpression()), !dbg !19 34 %cmp1 = icmp slt i32 1, %argc, !dbg !19 35 br i1 %cmp1, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !19 36 37for.body.lr.ph: ; preds = %entry 38 br label %for.body, !dbg !19 39 40for.cond.for.cond.cleanup_crit_edge: ; preds = %for.inc 41 br label %for.cond.cleanup, !dbg !19 42 43for.cond.cleanup: ; preds = %for.cond.for.cond.cleanup_crit_edge, %entry 44 br label %for.end 45 46for.body: ; preds = %for.body.lr.ph, %for.inc 47 %ArgIndex.02 = phi i32 [ 1, %for.body.lr.ph ], [ %add, %for.inc ] 48 call void @llvm.dbg.value(metadata i32 %ArgIndex.02, metadata !17, metadata !DIExpression()), !dbg !19 49 %idxprom = sext i32 %ArgIndex.02 to i64, !dbg !19 50 %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 %idxprom, !dbg !19 51 %0 = load i8*, i8** %arrayidx, align 8, !dbg !19 52 %call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i32 %ArgIndex.02, i8* %0), !dbg !19 53 br label %for.inc, !dbg !19 54 55for.inc: ; preds = %for.body 56 %add = add nsw i32 %ArgIndex.02, 1, !dbg !19 57 call void @llvm.dbg.value(metadata i32 %add, metadata !17, metadata !DIExpression()), !dbg !19 58 %cmp = icmp slt i32 %add, %argc, !dbg !19 59 br i1 %cmp, label %for.body, label %for.cond.for.cond.cleanup_crit_edge, !dbg !19, !llvm.loop !19 60 61for.end: ; preds = %for.cond.cleanup 62 ret i32 0, !dbg !19 63} 64 65declare dso_local i32 @printf(i8*, ...) 66 67declare void @llvm.dbg.value(metadata, metadata, metadata) 68 69!llvm.dbg.cu = !{!0} 70!llvm.module.flags = !{!3, !4, !5} 71!llvm.ident = !{!6} 72 73!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 74!1 = !DIFile(filename: "test.cpp", directory: "") 75!2 = !{} 76!3 = !{i32 2, !"Dwarf Version", i32 4} 77!4 = !{i32 2, !"Debug Info Version", i32 3} 78!5 = !{i32 1, !"wchar_size", i32 4} 79!6 = !{!"clang"} 80!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14) 81!8 = !DISubroutineType(types: !9) 82!9 = !{!10, !10, !11} 83!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 84!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) 85!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64) 86!13 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 87!14 = !{!15, !16, !17} 88!15 = !DILocalVariable(name: "argc", arg: 1, scope: !7, file: !1, line: 4, type: !10) 89!16 = !DILocalVariable(name: "argv", arg: 2, scope: !7, file: !1, line: 4, type: !11) 90!17 = !DILocalVariable(name: "ArgIndex", scope: !18, file: !1, line: 6, type: !10) 91!18 = distinct !DILexicalBlock(scope: !7, file: !1, line: 6) 92!19 = !DILocation(line: 0, scope: !7) 93