1; RUN: llc -filetype=asm < %s | FileCheck %s
2target triple = "thumbv7-apple-ios7.0.0"
3%class.Matrix3.0.6.10 = type { [9 x float] }
4define arm_aapcscc void @_Z9GetMatrixv(%class.Matrix3.0.6.10* noalias nocapture sret %agg.result) #0 !dbg !39 {
5  br i1 fcmp oeq (float fadd (float fadd (float fmul (float undef, float undef), float fmul (float undef, float undef)), float fmul (float undef, float undef)), float 0.000000e+00), label %_ZN7Vector39NormalizeEv.exit, label %1
6  tail call arm_aapcscc void @_ZL4Sqrtd() #3
7  br label %_ZN7Vector39NormalizeEv.exit
8_ZN7Vector39NormalizeEv.exit:                     ; preds = %1, %0
9  ; rdar://problem/15094721.
10  ;
11  ; When this (partially) dead use gets eliminated (and thus the def
12  ; of the vreg holding %agg.result) the dbg_value becomes dangling
13  ; and SelectionDAGISel crashes.  It should definitely not
14  ; crash. Drop the dbg_value instead.
15  ; CHECK-NOT: "matrix"
16  tail call void @llvm.dbg.declare(metadata %class.Matrix3.0.6.10* %agg.result, metadata !45, metadata !DIExpression(DW_OP_deref))
17  %2 = getelementptr inbounds %class.Matrix3.0.6.10, %class.Matrix3.0.6.10* %agg.result, i32 0, i32 0, i32 8
18  ret void
19}
20declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
21declare arm_aapcscc void @_ZL4Sqrtd() #2
22!4 = !DICompositeType(tag: DW_TAG_class_type, name: "Matrix3", line: 20, size: 288, align: 32, file: !5, identifier: "_ZTS7Matrix3")
23!5 = !DIFile(filename: "test.ii", directory: "/Volumes/Data/radar/15094721")
24!39 = distinct !DISubprogram(name: "GetMatrix", linkageName: "_Z9GetMatrixv", line: 32, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 32, file: !5, scope: !40, type: !41)
25!40 = !DIFile(filename: "test.ii", directory: "/Volumes/Data/radar/15094721")
26!41 = !DISubroutineType(types: null)
27!45 = !DILocalVariable(name: "matrix", line: 35, scope: !39, file: !40, type: !4)
28