[ARM] Implement __builtin_thread_pointer.

llvm-svn: 43892
diff --git a/llvm/test/CodeGen/ARM/thread_pointer.ll b/llvm/test/CodeGen/ARM/thread_pointer.ll
new file mode 100644
index 0000000..6476b48
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/thread_pointer.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | llc -march=arm -mtriple=arm-linux-gnueabi | \
+; RUN:     grep {__aeabi_read_tp}
+
+define i8* @test() {
+entry:
+	%tmp1 = call i8* @llvm.arm.thread.pointer( )		; <i8*> [#uses=0]
+	ret i8* %tmp1
+}
+
+declare i8* @llvm.arm.thread.pointer()