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1; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core2 | FileCheck %s2; rdar://78420283 4; Do not delete partially dead copy instructions.5; dead %rdi = MOV64rr killed %rax, implicit-def %edi6; REP_MOVSD implicit dead %ecx, implicit dead %edi, implicit dead %esi, implicit killed %ecx, implicit killed %edi, implicit killed %esi7 8 9%struct.F = type { ptr, i32, i32, i8, i32, i32, i32 }10%struct.FC = type { [10 x i8], [32 x i32], ptr, i32 }11 12define void @t(ptr %this) nounwind {13entry:14; CHECK-LABEL: t:15; CHECK: addq $12, %rsi16 %BitValueArray = alloca [32 x i32], align 417 %tmp3 = load ptr, ptr %this, align 818 %tmp4 = getelementptr inbounds %struct.FC, ptr %tmp3, i64 0, i32 1, i64 019 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %BitValueArray, ptr align 4 %tmp4, i64 128, i1 false)20 unreachable21}22 23declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind24