1; REQUIRES: x86 2; RUN: rm -f %t.a 3; RUN: llvm-as -o %t.o %s 4; RUN: llvm-as -o %t2.o %S/Inputs/libcall-archive.ll 5; RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux -o %t3.o %S/Inputs/libcall-archive.s 6; RUN: llvm-ar rcs %t.a %t2.o %t3.o 7; RUN: ld.lld --why-extract=%t.why.txt -o %t %t.o %t.a 8; RUN: FileCheck %s --input-file=%t.why.txt --check-prefix=CHECK-WHY 9; RUN: llvm-nm %t | FileCheck %s 10; RUN: ld.lld -o %t2 %t.o --start-lib %t2.o %t3.o --end-lib 11; RUN: llvm-nm %t2 | FileCheck %s 12 13; CHECK-WHY: reference extracted symbol 14; CHECK-WHY-NEXT: <libcall> {{.*}}tmp.a({{.*}}tmp2.o) memcpy 15 16; CHECK-NOT: T __sync_val_compare_and_swap_8 17; CHECK: T _start 18; CHECK: T memcpy 19 20target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 21target triple = "x86_64-unknown-linux-gnu" 22 23define void @_start(ptr %a, ptr %b) { 24entry: 25 call void @llvm.memcpy.p0.p0.i64(ptr %a, ptr %b, i64 1024, i1 false) 26 ret void 27} 28 29declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) 30