r341833 - Prevent cpu-specific/cpu-dispatch from giong on a lambda.

[Erich Keane via cfe-commits]

Author: erichkeane
Date: Mon Sep 10 07:31:56 2018
New Revision: 341833

URL: http://llvm.org/viewvc/llvm-project?rev=341833&view=rev
Log:
Prevent cpu-specific/cpu-dispatch from giong on a lambda.

It is non-sensical to use cpu-specific/cpu-dispatch multiversioning
on a lambda, so prevent it when trying to add the attribute.

Modified:
    cfe/trunk/lib/Sema/SemaDeclAttr.cpp
    cfe/trunk/test/SemaCXX/attr-cpuspecific.cpp

Modified: cfe/trunk/lib/Sema/SemaDeclAttr.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclAttr.cpp?rev=341833&r1=341832&r2=341833&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDeclAttr.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDeclAttr.cpp Mon Sep 10 07:31:56 2018
@@ -1842,6 +1842,14 @@ static void handleRestrictAttr(Sema &S,
 
 static void handleCPUSpecificAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
   FunctionDecl *FD = cast<FunctionDecl>(D);
+
+  if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) {
+    if (MD->getParent()->isLambda()) {
+      S.Diag(AL.getLoc(), diag::err_attribute_dll_lambda) << AL;
+      return;
+    }
+  }
+
   if (!checkAttributeAtLeastNumArgs(S, AL, 1))
     return;
 

Modified: cfe/trunk/test/SemaCXX/attr-cpuspecific.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/attr-cpuspecific.cpp?rev=341833&r1=341832&r2=341833&view=diff
==============================================================================
--- cfe/trunk/test/SemaCXX/attr-cpuspecific.cpp (original)
+++ cfe/trunk/test/SemaCXX/attr-cpuspecific.cpp Mon Sep 10 07:31:56 2018
@@ -109,3 +109,6 @@ int __attribute__((cpu_specific(sandybri
 
 // Ensure Cpp Spelling works.
 [[clang::cpu_specific(ivybridge,atom)]] int CppSpelling(){}
+
+// expected-error at +1 {{lambda cannot be declared 'cpu_dispatch'}}
+auto x = []() __attribute__((cpu_dispatch(atom))) {};