1 ; RUN: llc -filetype=asm < %s | FileCheck %s 2 target triple = "thumbv7-apple-ios7.0.0" 3 %class.Matrix3.0.6.10 = type { [9 x float] } 4 define 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 } 20 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 21 declare 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
