From f0ba69fc16fc32cfca7212265d969d9c274e53b6 Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue, 28 Jul 2015 13:10:10 +0000
Subject: [PATCH] [AArch64] Implement __builtin_thread_pointer

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


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@243413 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Basic/BuiltinsAArch64.def | 1 +
 lib/CodeGen/CGBuiltin.cpp               | 5 +++++
 test/CodeGen/builtins-arm64.c           | 5 +++++
 3 files changed, 11 insertions(+)

diff --git a/include/clang/Basic/BuiltinsAArch64.def b/include/clang/Basic/BuiltinsAArch64.def
index 1db4c14710..b4404434e7 100644
--- a/include/clang/Basic/BuiltinsAArch64.def
+++ b/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/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 9b8694f9c5..a54b10f943 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/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/test/CodeGen/builtins-arm64.c b/test/CodeGen/builtins-arm64.c
index f2c1c54545..16e22d771f 100644
--- a/test/CodeGen/builtins-arm64.c
+++ b/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);
-- 
2.40.0