Enable intel_ocl_bicc for x86_64 target only. Remove fix from 171969 that enabled this extension for multiple targets.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172052 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Basic/TargetInfo.h b/include/clang/Basic/TargetInfo.h
index 7ecd6d5..328ffd9 100644
--- a/include/clang/Basic/TargetInfo.h
+++ b/include/clang/Basic/TargetInfo.h
@@ -775,7 +775,6 @@
         return CCCR_Warning;
       case CC_C:
       case CC_Default:
-      case CC_IntelOclBicc:
         return CCCR_OK;
     }
   }
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index f79aec3..3426262 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2895,7 +2895,9 @@
   }
 
   virtual CallingConvCheckResult checkCallingConvention(CallingConv CC) const {
-    return TargetInfo::checkCallingConvention(CC);
+    return (CC == CC_Default ||
+            CC == CC_C || 
+            CC == CC_IntelOclBicc) ? CCCR_OK : CCCR_Warning;
   }
 
   virtual CallingConv getDefaultCallingConv(CallingConvMethodType MT) const {
diff --git a/test/CodeGen/intel_ocl_bicc.c b/test/CodeGen/intel_ocl_bicc.c
index 2f5c58c..c5c5229 100644
--- a/test/CodeGen/intel_ocl_bicc.c
+++ b/test/CodeGen/intel_ocl_bicc.c
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
 
 void __attribute__((intel_ocl_bicc)) f1(void);