add intrinsics: __builtin_arm_{dmb,dsb} for ARM

llvm-svn: 194513

clang/include/clang/Basic/BuiltinsARM.def

@@ -61,6 +61,10 @@ BUILTIN(__builtin_arm_crc32cd, "UiUiLLUi", "nc")
 // HINT
 BUILTIN(__builtin_arm_sevl, "v", "")
 
+// Data barrier
+BUILTIN(__builtin_arm_dmb, "vUi", "nc")
+BUILTIN(__builtin_arm_dsb, "vUi", "nc")
+
 // NEON
 #define GET_NEON_BUILTINS
 #include "clang/Basic/arm_neon.inc"

clang/lib/Sema/SemaChecking.cpp

@@ -624,6 +624,8 @@ bool Sema::CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
   case ARM::BI__builtin_arm_usat: i = 1; u = 31; break;
   case ARM::BI__builtin_arm_vcvtr_f:
   case ARM::BI__builtin_arm_vcvtr_d: i = 1; u = 1; break;
+  case ARM::BI__builtin_arm_dmb:
+  case ARM::BI__builtin_arm_dsb: l = 0; u = 15; break;
 #define GET_NEON_IMMEDIATE_CHECK
 #include "clang/Basic/arm_neon.inc"
 #undef GET_NEON_IMMEDIATE_CHECK

clang/test/CodeGen/builtins-arm.c

@@ -22,5 +22,9 @@ void test_eh_return_data_regno()
 void sevl() {
   __builtin_arm_sevl();
 }
-
 // CHECK: call {{.*}} @llvm.arm.sevl
+
+void test_barrier() {
+  __builtin_arm_dmb(1); //CHECK: call {{.*}} @llvm.arm.dmb(i32 1)
+  __builtin_arm_dsb(2); //CHECK: call {{.*}} @llvm.arm.dsb(i32 2)
+}