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      1 ; RUN: opt -codegenprepare -S %s -o - | FileCheck %s
      2 ; typedef struct info {
      3 ;   unsigned long long size;
      4 ; } info_t;
      5 ; extern unsigned p;
      6 ; extern unsigned n;
      7 ; void f() {
      8 ;   unsigned int i;
      9 ;   if (p) {
     10 ;     info_t *info = (info_t *)p;
     11 ;     for (i = 0; i < n; i++)
     12 ;       use(info[i].size);
     13 ;   }
     14 ; }
     15 source_filename = "debug.i"
     16 target datalayout = "e-m:o-p:32:32-i64:64-a:0:32-n32-S128"
     17 target triple = "thumbv7k-apple-ios10.0.0"
     18 
     19 %struct.info = type { i64 }
     20 
     21 @p = external local_unnamed_addr global i32, align 4
     22 @n = external local_unnamed_addr global i32, align 4
     23 
     24 ; Function Attrs: nounwind ssp uwtable
     25 define void @f() local_unnamed_addr #0 !dbg !16 {
     26 entry:
     27   %0 = load i32, i32* @p, align 4, !dbg !25
     28   %tobool = icmp eq i32 %0, 0, !dbg !25
     29   br i1 %tobool, label %if.end, label %if.then, !dbg !26
     30 
     31 if.then:                                          ; preds = %entry
     32   %1 = inttoptr i32 %0 to %struct.info*, !dbg !27
     33   tail call void @llvm.dbg.value(metadata %struct.info* %1, metadata !22, metadata !DIExpression()), !dbg !28
     34   ; CHECK: call void @llvm.dbg.value(metadata i32 %0, metadata !22, metadata !DIExpression())
     35   tail call void @llvm.dbg.value(metadata i32 0, metadata !20, metadata !DIExpression()), !dbg !29
     36   %2 = load i32, i32* @n, align 4, !dbg !30
     37   %cmp5 = icmp eq i32 %2, 0, !dbg !33
     38   br i1 %cmp5, label %if.end, label %for.body.preheader, !dbg !34
     39 
     40 for.body.preheader:                               ; preds = %if.then
     41   ; CHECK: for.body.preheader:
     42   ; CHECK:   %2 = inttoptr i32 %0 to %struct.info*
     43   br label %for.body, !dbg !35
     44 
     45 for.body:                                         ; preds = %for.body.preheader, %for.body
     46   %lsr.iv = phi %struct.info* [ %1, %for.body.preheader ], [ %scevgep, %for.body ]
     47   %i.06 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
     48   %lsr.iv7 = bitcast %struct.info* %lsr.iv to i64*
     49   tail call void @llvm.dbg.value(metadata i32 %i.06, metadata !20, metadata !DIExpression()), !dbg !29
     50   %3 = load i64, i64* %lsr.iv7, align 8, !dbg !35
     51   %call = tail call i32 bitcast (i32 (...)* @use to i32 (i64)*)(i64 %3) #3, !dbg !36
     52   %inc = add nuw i32 %i.06, 1, !dbg !37
     53   tail call void @llvm.dbg.value(metadata i32 %inc, metadata !20, metadata !DIExpression()), !dbg !29
     54   %4 = load i32, i32* @n, align 4, !dbg !30
     55   %scevgep = getelementptr %struct.info, %struct.info* %lsr.iv, i32 1, !dbg !33
     56   %cmp = icmp ult i32 %inc, %4, !dbg !33
     57   br i1 %cmp, label %for.body, label %if.end.loopexit, !dbg !34, !llvm.loop !38
     58 
     59 if.end.loopexit:                                  ; preds = %for.body
     60   br label %if.end, !dbg !40
     61 
     62 if.end:                                           ; preds = %if.end.loopexit, %if.then, %entry
     63   ret void, !dbg !40
     64 }
     65 declare i32 @use(...) local_unnamed_addr #1
     66 
     67 ; Function Attrs: nounwind readnone speculatable
     68 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
     69 
     70 attributes #0 = { nounwind ssp uwtable }
     71 attributes #2 = { nounwind readnone speculatable }
     72 attributes #3 = { nobuiltin nounwind }
     73 
     74 !llvm.dbg.cu = !{!0}
     75 !llvm.module.flags = !{!10, !11, !12, !13, !14}
     76 !llvm.ident = !{!15}
     77 
     78 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 317231) (llvm/trunk 317262)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
     79 !1 = !DIFile(filename: "debug.i", directory: "/Data/radar/35321562")
     80 !2 = !{}
     81 !3 = !{!4}
     82 !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 32)
     83 !5 = !DIDerivedType(tag: DW_TAG_typedef, name: "info_t", file: !1, line: 3, baseType: !6)
     84 !6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "info", file: !1, line: 1, size: 64, elements: !7)
     85 !7 = !{!8}
     86 !8 = !DIDerivedType(tag: DW_TAG_member, name: "size", scope: !6, file: !1, line: 2, baseType: !9, size: 64)
     87 !9 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
     88 !10 = !{i32 2, !"Dwarf Version", i32 4}
     89 !11 = !{i32 2, !"Debug Info Version", i32 3}
     90 !12 = !{i32 1, !"wchar_size", i32 4}
     91 !13 = !{i32 1, !"min_enum_size", i32 4}
     92 !14 = !{i32 7, !"PIC Level", i32 2}
     93 !15 = !{!"clang version 6.0.0 (trunk 317231) (llvm/trunk 317262)"}
     94 !16 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 6, type: !17, isLocal: false, isDefinition: true, scopeLine: 6, isOptimized: true, unit: !0, retainedNodes: !19)
     95 !17 = !DISubroutineType(types: !18)
     96 !18 = !{null}
     97 !19 = !{!20, !22}
     98 !20 = !DILocalVariable(name: "i", scope: !16, file: !1, line: 7, type: !21)
     99 !21 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
    100 !22 = !DILocalVariable(name: "info", scope: !23, file: !1, line: 9, type: !4)
    101 !23 = distinct !DILexicalBlock(scope: !24, file: !1, line: 8, column: 10)
    102 !24 = distinct !DILexicalBlock(scope: !16, file: !1, line: 8, column: 7)
    103 !25 = !DILocation(line: 8, column: 7, scope: !24)
    104 !26 = !DILocation(line: 8, column: 7, scope: !16)
    105 !27 = !DILocation(line: 9, column: 20, scope: !23)
    106 !28 = !DILocation(line: 9, column: 13, scope: !23)
    107 !29 = !DILocation(line: 7, column: 16, scope: !16)
    108 !30 = !DILocation(line: 10, column: 21, scope: !31)
    109 !31 = distinct !DILexicalBlock(scope: !32, file: !1, line: 10, column: 5)
    110 !32 = distinct !DILexicalBlock(scope: !23, file: !1, line: 10, column: 5)
    111 !33 = !DILocation(line: 10, column: 19, scope: !31)
    112 !34 = !DILocation(line: 10, column: 5, scope: !32)
    113 !35 = !DILocation(line: 11, column: 19, scope: !31)
    114 !36 = !DILocation(line: 11, column: 7, scope: !31)
    115 !37 = !DILocation(line: 10, column: 25, scope: !31)
    116 !38 = distinct !{!38, !34, !39}
    117 !39 = !DILocation(line: 11, column: 23, scope: !32)
    118 !40 = !DILocation(line: 13, column: 1, scope: !16)
    119