1; RUN: llc -mtriple=x86_64-unknown-linux-gnu -start-after=codegenprepare -stop-before=finalize-isel -o - %s -experimental-debug-variable-locations=true | FileCheck %s --implicit-check-not=DBG_PHI 2 3; Test that for multiple dbg.values referring to the same argument, we emit a 4; single DBG_PHI and refer to it twice. (Using more than one DBG_PHI is fine, 5; but inefficient). 6 7; CHECK-DAG: ![[LOCAL:.*]] = !DILocalVariable(name: "local" 8; CHECK-DAG: ![[LOCAL2:.*]] = !DILocalVariable(name: "local2" 9 10; CHECK: DBG_PHI $edi, 1 11 12; CHECK: DBG_INSTR_REF ![[LOCAL]], !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0) 13; CHECK: DBG_INSTR_REF ![[LOCAL2]], !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0) 14 15declare void @bar(i32) 16declare void @llvm.dbg.value(metadata, metadata, metadata) 17 18define dso_local void @foo_local(i32 %t1a) local_unnamed_addr !dbg !7 { 19entry: 20 tail call void @bar(i32 %t1a) #3, !dbg !17 21 %bees = add i32 %t1a, 3 22 call void @llvm.dbg.value(metadata i32 %t1a, metadata !13, metadata !DIExpression()), !dbg !14 23 call void @llvm.dbg.value(metadata i32 %t1a, metadata !19, metadata !DIExpression()), !dbg !14 24 tail call void @bar(i32 %bees) #3, !dbg !17 25 ret void, !dbg !18 26} 27 28!llvm.dbg.cu = !{!0} 29!llvm.module.flags = !{!3, !4, !5} 30!llvm.ident = !{!6} 31 32!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 33!1 = !DIFile(filename: "foo.c", directory: "") 34!2 = !{} 35!3 = !{i32 2, !"Dwarf Version", i32 4} 36!4 = !{i32 2, !"Debug Info Version", i32 3} 37!5 = !{i32 1, !"wchar_size", i32 4} 38!6 = !{!"clang"} 39!7 = distinct !DISubprogram(name: "foo_local", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 40!8 = !DISubroutineType(types: !9) 41!9 = !{null, !10} 42!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 43!11 = !{!12, !13} 44!12 = !DILocalVariable(name: "t1a", arg: 1, scope: !7, file: !1, line: 3, type: !10) 45!13 = !DILocalVariable(name: "local", scope: !7, file: !1, line: 4, type: !10) 46!14 = !DILocation(line: 3, column: 20, scope: !7) 47!15 = !DILocation(line: 4, column: 7, scope: !7) 48!16 = !DILocation(line: 5, column: 3, scope: !7) 49!17 = !DILocation(line: 7, column: 3, scope: !7) 50!18 = !DILocation(line: 8, column: 1, scope: !7) 51!19 = !DILocalVariable(name: "local2", scope: !7, file: !1, line: 4, type: !10) 52