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Adhemerval Zanella fb3d3bb963 Implement __builtin_thread_pointer

This path add the aarch64 lowering of __builtin_thread_pointer.  It uses
the already implemented AArch64ISD::THREAD_POINTER used in TLS generation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243412 91177308-0d34-0410-b5e6-96231b3b80d8

2015-07-28 13:03:31 +00:00

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 ; RUN: llc < %s -march=aarch64 -mtriple=aarch64-linux-gnu | FileCheck %s
 ; Function Attrs: nounwind readnone
 declare i8* @llvm.aarch64.thread.pointer() #1
 define i8* @thread_pointer() {
 ; CHECK: thread_pointer:
 ; CHECK: mrs {{x[0-9]+}}, TPIDR_EL0
   %1 = tail call i8* @llvm.aarch64.thread.pointer()
   ret i8* %1
 }