From 570918821a8492048e6ab54955c9864bd6c3e952 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Tue, 2 May 2017 18:30:45 +0000
Subject: Vendor import of clang trunk r301939:
 https://llvm.org/svn/llvm-project/cfe/trunk@301939

---
 lib/Sema/SemaDeclObjC.cpp | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'lib/Sema/SemaDeclObjC.cpp')

diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 4f51cd399c0cd..fe9ba6f1f8110 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -4313,6 +4313,51 @@ static void mergeInterfaceMethodToImpl(Sema &S,
   }
 }
 
+/// Verify that the method parameters/return value have types that are supported
+/// by the x86 target.
+static void checkObjCMethodX86VectorTypes(Sema &SemaRef,
+                                          const ObjCMethodDecl *Method) {
+  assert(SemaRef.getASTContext().getTargetInfo().getTriple().getArch() ==
+             llvm::Triple::x86 &&
+         "x86-specific check invoked for a different target");
+  SourceLocation Loc;
+  QualType T;
+  for (const ParmVarDecl *P : Method->parameters()) {
+    if (P->getType()->isVectorType()) {
+      Loc = P->getLocStart();
+      T = P->getType();
+      break;
+    }
+  }
+  if (Loc.isInvalid()) {
+    if (Method->getReturnType()->isVectorType()) {
+      Loc = Method->getReturnTypeSourceRange().getBegin();
+      T = Method->getReturnType();
+    } else
+      return;
+  }
+
+  // Vector parameters/return values are not supported by objc_msgSend on x86 in
+  // iOS < 9 and macOS < 10.11.
+  const auto &Triple = SemaRef.getASTContext().getTargetInfo().getTriple();
+  VersionTuple AcceptedInVersion;
+  if (Triple.getOS() == llvm::Triple::IOS)
+    AcceptedInVersion = VersionTuple(/*Major=*/9);
+  else if (Triple.isMacOSX())
+    AcceptedInVersion = VersionTuple(/*Major=*/10, /*Minor=*/11);
+  else
+    return;
+  VersionTuple MethodVersion = Method->getVersionIntroduced();
+  if (SemaRef.getASTContext().getTargetInfo().getPlatformMinVersion() >=
+          AcceptedInVersion &&
+      (MethodVersion.empty() || MethodVersion >= AcceptedInVersion))
+    return;
+  SemaRef.Diag(Loc, diag::err_objc_method_unsupported_param_ret_type)
+      << T << (Method->getReturnType()->isVectorType() ? /*return value*/ 1
+                                                       : /*parameter*/ 0)
+      << (Triple.isMacOSX() ? "macOS 10.11" : "iOS 9");
+}
+
 Decl *Sema::ActOnMethodDeclaration(
     Scope *S,
     SourceLocation MethodLoc, SourceLocation EndLoc,
@@ -4534,6 +4579,10 @@ Decl *Sema::ActOnMethodDeclaration(
       ObjCMethod->SetRelatedResultType();
   }
 
+  if (MethodDefinition &&
+      Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86)
+    checkObjCMethodX86VectorTypes(*this, ObjCMethod);
+
   ActOnDocumentableDecl(ObjCMethod);
 
   return ObjCMethod;
-- 
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