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 { 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 !{!"0x102"}) 17 %2 = getelementptr inbounds %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 = !{!"0x2\00Matrix3\0020\00288\0032\000\000\000", !5, null, null, null, null, null, !"_ZTS7Matrix3"} ; [ DW_TAG_class_type ] [Matrix3] [line 20, size 288, align 32, offset 0] [def] [from ] 23!5 = !{!"test.ii", !"/Volumes/Data/radar/15094721"} 24!39 = !{!"0x2e\00GetMatrix\00GetMatrix\00_Z9GetMatrixv\0032\000\001\000\006\00256\001\0032", !5, !40, !41, null, void (%class.Matrix3.0.6.10*)* @_Z9GetMatrixv, null, null, null} ; [ DW_TAG_subprogram ] [line 32] [def] [GetMatrix] 25!40 = !{!"0x29", !5} ; [ DW_TAG_file_type ] [/Volumes/Data/radar/15094721/test.ii] 26!41 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, null, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 27!45 = !{!"0x100\00matrix\0035\008192", !39, !40, !4} ; [ DW_TAG_auto_variable ] [matrix] [line 35] 28