From 2eeb0489054888b580f4b0ccf54e2df34c4a91d9 Mon Sep 17 00:00:00 2001
From: Artem Belevich <tra@google.com>
Date: Fri, 21 Sep 2018 17:46:28 +0000
Subject: [PATCH] [CUDA] Fixed parsing of optional template-argument-list.

We need to consider all tokens that start with '>' when
we're checking for the end of an empty template argument list.

Differential Revision: https://reviews.llvm.org/D52321

llvm-svn: 342752
---
 clang/lib/Parse/ParseTemplate.cpp           | 4 +++-
 clang/test/Parser/cuda-kernel-call-c++11.cu | 6 +++++-
 clang/test/Parser/cuda-kernel-call.cu       | 4 +++-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index 5af5437..26709a5 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -946,7 +946,9 @@ Parser::ParseTemplateIdAfterTemplateName(bool ConsumeLastToken,
   bool Invalid = false;
   {
     GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
-    if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater))
+    if (!Tok.isOneOf(tok::greater, tok::greatergreater,
+                     tok::greatergreatergreater, tok::greaterequal,
+                     tok::greatergreaterequal))
       Invalid = ParseTemplateArgumentList(TemplateArgs);
 
     if (Invalid) {
diff --git a/clang/test/Parser/cuda-kernel-call-c++11.cu b/clang/test/Parser/cuda-kernel-call-c++11.cu
index 8f833f7..1870b201 100644
--- a/clang/test/Parser/cuda-kernel-call-c++11.cu
+++ b/clang/test/Parser/cuda-kernel-call-c++11.cu
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s
 
-template<typename> struct S {};
+template<typename T=int> struct S {};
 template<typename> void f();
 
 
@@ -11,10 +11,14 @@ void foo(void) {
   // expected-no-diagnostics
 
   S<S<S<int>>> s3;
+  S<S<S<>>> s30;
 
   S<S<S<S<int>>>> s4;
+  S<S<S<S<>>>> s40;
 
   S<S<S<S<S<int>>>>> s5;
+  S<S<S<S<S<>>>>> s50;
 
   (void)(&f<S<S<int>>>==0);
+  (void)(&f<S<S<>>>==0);
 }
diff --git a/clang/test/Parser/cuda-kernel-call.cu b/clang/test/Parser/cuda-kernel-call.cu
index 1970c55..2a409aa3 100644
--- a/clang/test/Parser/cuda-kernel-call.cu
+++ b/clang/test/Parser/cuda-kernel-call.cu
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
 
-template<typename> struct S {};
+template<typename T=int> struct S {};
 template<typename> void f();
 
 void foo(void) {
@@ -13,5 +13,7 @@ void foo(void) {
   // The following two are parse errors because -std=c++11 is not enabled.
 
   S<S<S<int>>> s; // expected-error 2{{use '> >'}}
+  S<S<S<>>> s1; // expected-error 2{{use '> >'}}
   (void)(&f<S<S<int>>>==0); // expected-error 2{{use '> >'}}
+  (void)(&f<S<S<>>>==0); // expected-error 2{{use '> >'}}
 }
-- 
2.7.4