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      1 ; REQUIRES: object-emission
      2 
      3 ; RUN: llc -mtriple=x86_64-linux -O0 -filetype=obj < %s \
      4 ; RUN:     | llvm-dwarfdump -v -debug-info - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-V4 %s
      5 ; RUN: llc -mtriple=x86_64-linux -dwarf-version=3 -O0 -filetype=obj < %s \
      6 ; RUN:     | llvm-dwarfdump -v -debug-info - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-V3 %s
      7 
      8 ; Check that we emit DW_TAG_lexical_block and that it has the right encoding
      9 ; depending on the dwarf version.
     10 
     11 ; CHECK: DW_TAG_lexical_block
     12 ; CHECK-NOT: DW_TAG
     13 ; CHECK: DW_AT_low_pc [DW_FORM_addr]
     14 ; CHECK-NOT: DW_TAG
     15 ; CHECK-V4: DW_AT_high_pc [DW_FORM_data4]
     16 ; CHECK-V3: DW_AT_high_pc [DW_FORM_addr]
     17 
     18 ; Test case produced from:
     19 ; void b() {
     20 ;   if (int i = 3)
     21 ;     return;
     22 ; }
     23 
     24 ; Function Attrs: nounwind uwtable
     25 define void @_Z1bv() #0 !dbg !4 {
     26 entry:
     27   %i = alloca i32, align 4
     28   call void @llvm.dbg.declare(metadata i32* %i, metadata !11, metadata !DIExpression()), !dbg !14
     29   store i32 3, i32* %i, align 4, !dbg !14
     30   %0 = load i32, i32* %i, align 4, !dbg !14
     31   %tobool = icmp ne i32 %0, 0, !dbg !14
     32   br i1 %tobool, label %if.then, label %if.end, !dbg !14
     33 
     34 if.then:                                          ; preds = %entry
     35   br label %if.end, !dbg !15
     36 
     37 if.end:                                           ; preds = %if.then, %entry
     38   ret void, !dbg !16
     39 }
     40 
     41 ; Function Attrs: nounwind readnone
     42 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
     43 
     44 attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
     45 attributes #1 = { nounwind readnone }
     46 
     47 !llvm.dbg.cu = !{!0}
     48 !llvm.module.flags = !{!8, !9}
     49 !llvm.ident = !{!10}
     50 
     51 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
     52 !1 = !DIFile(filename: "lexical_block.cpp", directory: "/tmp/dbginfo")
     53 !2 = !{}
     54 !4 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, retainedNodes: !2)
     55 !5 = !DIFile(filename: "lexical_block.cpp", directory: "/tmp/dbginfo")
     56 !6 = !DISubroutineType(types: !7)
     57 !7 = !{null}
     58 !8 = !{i32 2, !"Dwarf Version", i32 4}
     59 !9 = !{i32 1, !"Debug Info Version", i32 3}
     60 !10 = !{!"clang version 3.5.0 "}
     61 !11 = !DILocalVariable(name: "i", line: 2, scope: !12, file: !5, type: !13)
     62 !12 = distinct !DILexicalBlock(line: 2, column: 0, file: !1, scope: !4)
     63 !13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
     64 !14 = !DILocation(line: 2, scope: !12)
     65 !15 = !DILocation(line: 3, scope: !12)
     66 !16 = !DILocation(line: 4, scope: !4)
     67