Add front-end infrastructure now address space casts are in LLVM IR.

With the introduction of explicit address space casts into LLVM, there's
a need to provide a new cast kind the front-end can create for C/OpenCL/CUDA
and code to produce address space casts from those kinds when appropriate.

Patch by Michele Scandale!

llvm-svn: 197036

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 14c8452fb52..4bc455837c7 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -1474,6 +1474,11 @@ bool CastExpr::CastConsistency() const {
     assert(getSubExpr()->getType()->isFunctionType());
     goto CheckNoBasePath;
 
+  case CK_AddressSpaceConversion:
+    assert(getType()->isPointerType());
+    assert(getSubExpr()->getType()->isPointerType());
+    assert(getType()->getPointeeType().getAddressSpace() !=
+           getSubExpr()->getType()->getPointeeType().getAddressSpace());
   // These should not have an inheritance path.
   case CK_Dynamic:
   case CK_ToUnion:
@@ -1637,6 +1642,8 @@ const char *CastExpr::getCastKindName() const {
     return "BuiltinFnToFnPtr";
   case CK_ZeroToOCLEvent:
     return "ZeroToOCLEvent";
+  case CK_AddressSpaceConversion:
+    return "AddressSpaceConversion";
   }
 
   llvm_unreachable("Unhandled cast kind!");