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      1 ; RUN: opt -S -licm %s | FileCheck %s
      2 ;
      3 ; LICM should null out debug locations when it hoists instructions out of a loop.
      4 ;
      5 ; Generated with
      6 ; clang -O0 -S -emit-llvm test.cpp -g -gline-tables-only -o t.ll
      7 ; opt -S -sroa -adce -simplifycfg -reassociate -domtree -loops \
      8 ;     -loop-simplify -lcssa -basicaa -aa -scalar-evolution -loop-rotate t.ll > test.ll
      9 ;
     10 ; void bar(int *);
     11 ; void foo(int k, int p)
     12 ; {
     13 ;    for (int i = 0; i < k; i++) {
     14 ;      bar(&p + 4);
     15 ;    }
     16 ; }
     17 ;
     18 ; We make sure that the instruction that is hoisted into the preheader
     19 ; does not have a debug location.
     20 ; CHECK: for.body.lr.ph:
     21 ; CHECK: getelementptr{{.*}}%p.addr, i64 4{{$}}
     22 ; CHECK: for.body:
     23 ;
     24 ; ModuleID = 't.ll'
     25 source_filename = "test.c"
     26 
     27 ; Function Attrs: nounwind sspstrong uwtable
     28 define void @foo(i32 %k, i32 %p) !dbg !7 {
     29 entry:
     30   %p.addr = alloca i32, align 4
     31   store i32 %p, i32* %p.addr, align 4
     32   %cmp2 = icmp slt i32 0, %k, !dbg !9
     33   br i1 %cmp2, label %for.body.lr.ph, label %for.end, !dbg !9
     34 
     35 for.body.lr.ph:                                   ; preds = %entry
     36   br label %for.body, !dbg !9
     37 
     38 for.body:                                         ; preds = %for.body.lr.ph, %for.body
     39   %i.03 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
     40   %add.ptr = getelementptr inbounds i32, i32* %p.addr, i64 4, !dbg !11
     41   call void @bar(i32* %add.ptr), !dbg !11
     42   %inc = add nsw i32 %i.03, 1, !dbg !12
     43   %cmp = icmp slt i32 %inc, %k, !dbg !9
     44   br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !9, !llvm.loop !14
     45 
     46 for.cond.for.end_crit_edge:                       ; preds = %for.body
     47   br label %for.end, !dbg !9
     48 
     49 for.end:                                          ; preds = %for.cond.for.end_crit_edge, %entry
     50   ret void, !dbg !16
     51 }
     52 
     53 declare void @bar(i32*)
     54 
     55 !llvm.dbg.cu = !{!0}
     56 !llvm.module.flags = !{!3, !4, !5}
     57 !llvm.ident = !{!6}
     58 
     59 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.1 (PS4 clang version 4.50.0.249 7e7cd823 checking)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
     60 !1 = !DIFile(filename: "test.c", directory: "D:\test")
     61 !2 = !{}
     62 !3 = !{i32 2, !"Dwarf Version", i32 4}
     63 !4 = !{i32 2, !"Debug Info Version", i32 3}
     64 !5 = !{i32 1, !"PIC Level", i32 2}
     65 !6 = !{!"clang version 3.9.1 (PS4 clang version 4.50.0.249 7e7cd823 checking)"}
     66 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
     67 !8 = !DISubroutineType(types: !2)
     68 !9 = !DILocation(line: 4, scope: !10)
     69 !10 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 1)
     70 !11 = !DILocation(line: 5, scope: !7)
     71 !12 = !DILocation(line: 4, scope: !13)
     72 !13 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 2)
     73 !14 = distinct !{!14, !15}
     74 !15 = !DILocation(line: 4, scope: !7)
     75 !16 = !DILocation(line: 7, scope: !7)
     76