[c++1z] Include "noexcept" in builtin function types where appropriate. Fixes

an assertion failure looking up a matching ::operator delete for
__builtin_operator_delete.

llvm-svn: 284458

clang/lib/AST/ASTContext.cpp

@@ -8671,6 +8671,9 @@ QualType ASTContext::GetBuiltinType(unsigned Id,
   FunctionProtoType::ExtProtoInfo EPI;
   EPI.ExtInfo = EI;
   EPI.Variadic = Variadic;
+  if (getLangOpts().CPlusPlus && BuiltinInfo.isNoThrow(Id))
+    EPI.ExceptionSpec.Type =
+        getLangOpts().CPlusPlus11 ? EST_BasicNoexcept : EST_DynamicNone;
 
   return getFunctionType(ResType, ArgTypes, EPI);
 }

clang/test/Analysis/cfg.cpp

@@ -92,7 +92,7 @@ void F(EmptyE e) {
 // CHECK-NEXT: Succs (1): B1
 // CHECK: [B1]
 // CHECK-NEXT:   1: __builtin_object_size
-// CHECK-NEXT:   2: [B1.1] (ImplicitCastExpr, BuiltinFnToFnPtr, unsigned long (*)(const void *, int))
+// CHECK-NEXT:   2: [B1.1] (ImplicitCastExpr, BuiltinFnToFnPtr, unsigned long (*)(const void *, int) noexcept)
 // CHECK-NEXT:   3: [B1.2](dummy(), 0)
 // CHECK-NEXT:   4: (void)[B1.3] (CStyleCastExpr, ToVoid, void)
 // CHECK-NEXT:   Preds (1): B2

clang/test/CodeGenCXX/cxx1z-noexcept-function-type.cpp

@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -fexceptions -fcxx-exceptions -std=c++1z -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
+
+// CHECK-LABEL: define {{.*}} @_Z11builtin_newm(
+// CHECK: call {{.*}} @_Znwm(
+void *builtin_new(unsigned long n) { return __builtin_operator_new(n); }
+
+// CHECK-LABEL: define {{.*}} @_Z14builtin_deletePv(
+// CHECK: call {{.*}} @_ZdlPv(
+void builtin_delete(void *p) { return __builtin_operator_delete(p); }