Introduce SPIR calling conventions.

This implements Section 3.7 from the SPIR 1.2 spec:

    SPIR kernels should use "spir_kernel" calling convention.
    Non-kernel functions use "spir_func" calling convention. All
    other calling conventions are disallowed.

The patch works only for OpenCL source. Any other uses will need
to ensure that kernels are assigned the spir_kernel calling
convention correctly.

llvm-svn: 226548

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/tools/libclang/CXType.cpp b/clang/tools/libclang/CXType.cpp
index 81cff5abb4f..04778ddfbb4 100644
--- a/clang/tools/libclang/CXType.cpp
+++ b/clang/tools/libclang/CXType.cpp
@@ -527,6 +527,9 @@ CXCallingConv clang_getFunctionTypeCallingConv(CXType X) {
       TCALLINGCONV(AAPCS_VFP);
       TCALLINGCONV(PnaclCall);
       TCALLINGCONV(IntelOclBicc);
+    case CC_SpirFunction: return CXCallingConv_Unexposed;
+    case CC_SpirKernel: return CXCallingConv_Unexposed;
+      break;
     }
 #undef TCALLINGCONV
   }