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1; Test that BDCE doesn't destroy llvm.dbg.value's argument.2; RUN: opt -passes=bdce %s -S | FileCheck %s3 4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"5target triple = "x86_64-unknown-linux-gnu"6 7; CHECK: define void @f()8; CHECK-NEXT: entry:9; CHECK-NEXT: tail call void (...) @h()10; CHECK-NEXT: %[[CALL:.*]] = tail call i32 (...) @g()11; CHECK-NEXT: #dbg_value(i32 %[[CALL:.*]]12 13define void @f() !dbg !6 {14entry:15 tail call void (...) @h(), !dbg !916 %call = tail call i32 (...) @g(), !dbg !1017 tail call void @llvm.dbg.value(metadata i32 %call, metadata !11, metadata !13), !dbg !1418 tail call void (...) @h(), !dbg !1519 ret void, !dbg !1620}21 22declare void @h(...)23declare i32 @g(...)24declare void @llvm.dbg.value(metadata, metadata, metadata)25 26!llvm.dbg.cu = !{!0}27!llvm.module.flags = !{!3, !4}28!llvm.ident = !{!5}29 30!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 288665) (llvm/trunk 288725)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)31!1 = !DIFile(filename: "patatino.c", directory: "/home/davide/work/llvm/build-clang/bin")32!2 = !{}33!3 = !{i32 2, !"Dwarf Version", i32 4}34!4 = !{i32 2, !"Debug Info Version", i32 3}35!5 = !{!"clang version 4.0.0 (trunk 288665) (llvm/trunk 288725)"}36!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !7, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: false, unit: !0, retainedNodes: !2)37!7 = !DISubroutineType(types: !8)38!8 = !{null}39!9 = !DILocation(line: 4, column: 3, scope: !6)40!10 = !DILocation(line: 5, column: 11, scope: !6)41!11 = !DILocalVariable(name: "a", scope: !6, file: !1, line: 5, type: !12)42!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)43!13 = !DIExpression()44!14 = !DILocation(line: 5, column: 7, scope: !6)45!15 = !DILocation(line: 6, column: 3, scope: !6)46!16 = !DILocation(line: 7, column: 1, scope: !6)47