[OpenCL] Pipe type support

Summary:
Support for OpenCL 2.0 pipe type.
This is a bug-fix version for bader's patch reviews.llvm.org/D14441


Reviewers: pekka.jaaskelainen, Anastasia

Subscribers: bader, Anastasia, cfe-commits

Differential Revision: http://reviews.llvm.org/D15603

llvm-svn: 257254

1 files changed, 24 insertions, 5 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 048a04328fc..1047120faee 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -195,6 +195,7 @@ TypeEvaluationKind CodeGenFunction::getEvaluationKind(QualType type) {
     case Type::FunctionNoProto:
     case Type::Enum:
     case Type::ObjCObjectPointer:
+    case Type::Pipe:
       return TEK_Scalar;
 
     // Complexes.
@@ -511,7 +512,8 @@ static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn,
         typeQuals += typeQuals.empty() ? "volatile" : " volatile";
     } else {
       uint32_t AddrSpc = 0;
-      if (ty->isImageType())
+      bool isPipe = ty->isPipeType();
+      if (ty->isImageType() || isPipe)
         AddrSpc =
           CGM.getContext().getTargetAddressSpace(LangAS::opencl_global);
 
@@ -519,7 +521,11 @@ static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn,
           llvm::ConstantAsMetadata::get(Builder.getInt32(AddrSpc)));
 
       // Get argument type name.
-      std::string typeName = ty.getUnqualifiedType().getAsString(Policy);
+      std::string typeName;
+      if (isPipe)
+        typeName = cast<PipeType>(ty)->getElementType().getAsString(Policy);
+      else
+        typeName = ty.getUnqualifiedType().getAsString(Policy);
 
       // Turn "unsigned type" to "utype"
       std::string::size_type pos = typeName.find("unsigned");
@@ -528,7 +534,12 @@ static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn,
 
       argTypeNames.push_back(llvm::MDString::get(Context, typeName));
 
-      std::string baseTypeName =
+      std::string baseTypeName;
+      if (isPipe)
+        baseTypeName =
+          cast<PipeType>(ty)->getElementType().getCanonicalType().getAsString(Policy);
+      else
+        baseTypeName =
           ty.getUnqualifiedType().getCanonicalType().getAsString(Policy);
 
       // Turn "unsigned type" to "utype"
@@ -543,12 +554,16 @@ static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn,
         typeQuals = "const";
       if (ty.isVolatileQualified())
         typeQuals += typeQuals.empty() ? "volatile" : " volatile";
+      if (isPipe)
+        typeQuals = "pipe";
     }
 
     argTypeQuals.push_back(llvm::MDString::get(Context, typeQuals));
 
-    // Get image access qualifier:
-    if (ty->isImageType()) {
+    // Get image and pipe access qualifier:
+    // FIXME: now image and pipe share the same access qualifier maybe we can
+    // refine it to OpenCL access qualifier and also handle write_read
+    if (ty->isImageType()|| ty->isPipeType()) {
       const OpenCLImageAccessAttr *A = parm->getAttr<OpenCLImageAccessAttr>();
       if (A && A->isWriteOnly())
         accessQuals.push_back(llvm::MDString::get(Context, "write_only"));
@@ -1727,6 +1742,10 @@ void CodeGenFunction::EmitVariablyModifiedType(QualType type) {
     case Type::Atomic:
       type = cast<AtomicType>(ty)->getValueType();
       break;
+
+    case Type::Pipe:
+      type = cast<PipeType>(ty)->getElementType();
+      break;
     }
   } while (type->isVariablyModifiedType());
 }