1 ; Test that BDCE doesn't destroy llvm.dbg.value's argument.
2 ; RUN: opt -bdce %s -S | FileCheck %s
4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
5 target triple = "x86_64-unknown-linux-gnu"
7 ; CHECK: define void @f()
9 ; CHECK-NEXT: tail call void (...) @h()
10 ; CHECK-NEXT: %[[CALL:.*]] = tail call i32 (...) @g()
11 ; CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 %[[CALL:.*]]
13 define void @f() !dbg !6 {
15 tail call void (...) @h(), !dbg !9
16 %call = tail call i32 (...) @g(), !dbg !10
17 tail call void @llvm.dbg.value(metadata i32 %call, metadata !11, metadata !13), !dbg !14
18 %patatino = xor i32 %call, %call
19 tail call void (...) @h(), !dbg !15
25 declare void @llvm.dbg.value(metadata, metadata, metadata)
28 !llvm.module.flags = !{!3, !4}
31 !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)
32 !1 = !DIFile(filename: "patatino.c", directory: "/home/davide/work/llvm/build-clang/bin")
34 !3 = !{i32 2, !"Dwarf Version", i32 4}
35 !4 = !{i32 2, !"Debug Info Version", i32 3}
36 !5 = !{!"clang version 4.0.0 (trunk 288665) (llvm/trunk 288725)"}
37 !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)
38 !7 = !DISubroutineType(types: !8)
40 !9 = !DILocation(line: 4, column: 3, scope: !6)
41 !10 = !DILocation(line: 5, column: 11, scope: !6)
42 !11 = !DILocalVariable(name: "a", scope: !6, file: !1, line: 5, type: !12)
43 !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
45 !14 = !DILocation(line: 5, column: 7, scope: !6)
46 !15 = !DILocation(line: 6, column: 3, scope: !6)
47 !16 = !DILocation(line: 7, column: 1, scope: !6)