[AArch64] Implement __builtin_thread_pointer

This path add the aarch64 __builtin_thread_pointer support.  It will be
lowered to llvm.aarch64.thread.pointer.

llvm-svn: 243413

3 files changed, 11 insertions, 0 deletions

diff --git a/clang/include/clang/Basic/BuiltinsAArch64.def b/clang/include/clang/Basic/BuiltinsAArch64.def
index 1db4c147102..b4404434e7a 100644
--- a/clang/include/clang/Basic/BuiltinsAArch64.def
+++ b/clang/include/clang/Basic/BuiltinsAArch64.def
@@ -60,5 +60,6 @@ BUILTIN(__builtin_arm_rsrp, "v*cC*", "nc")
 BUILTIN(__builtin_arm_wsr, "vcC*Ui", "nc")
 BUILTIN(__builtin_arm_wsr64, "vcC*LUi", "nc")
 BUILTIN(__builtin_arm_wsrp, "vcC*vC*", "nc")
+BUILTIN(__builtin_thread_pointer, "v*", "nc")
 
 #undef BUILTIN
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 9b8694f9c5f..a54b10f943b 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -4342,6 +4342,11 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
     return Builder.CreateCall(F);
   }
 
+  if (BuiltinID == AArch64::BI__builtin_thread_pointer) {
+    Function *F = CGM.getIntrinsic(Intrinsic::aarch64_thread_pointer);
+    return Builder.CreateCall(F);
+  }
+
   // CRC32
   Intrinsic::ID CRCIntrinsicID = Intrinsic::not_intrinsic;
   switch (BuiltinID) {
diff --git a/clang/test/CodeGen/builtins-arm64.c b/clang/test/CodeGen/builtins-arm64.c
index f2c1c545454..16e22d771fc 100644
--- a/clang/test/CodeGen/builtins-arm64.c
+++ b/clang/test/CodeGen/builtins-arm64.c
@@ -5,6 +5,11 @@ void f0(void *a, void *b) {
 // CHECK: call {{.*}} @__clear_cache
 }
 
+void *tp (void) {
+  return __builtin_thread_pointer ();
+// CHECK: call {{.*}} @llvm.aarch64.thread.pointer()
+}
+
 // CHECK: call {{.*}} @llvm.aarch64.rbit.i32(i32 %a)
 unsigned rbit(unsigned a) {
   return __builtin_arm_rbit(a);