diff --git a/clang/lib/Headers/opencl-c.h b/clang/lib/Headers/opencl-c.h
--- a/clang/lib/Headers/opencl-c.h
+++ b/clang/lib/Headers/opencl-c.h
@@ -11255,7 +11255,6 @@
 #endif //cl_khr_fp64
 
 #ifdef cl_khr_fp16
-half __ovld __purefn vload(size_t, const __constant half *);
 half2 __ovld __purefn vload2(size_t, const __constant half *);
 half3 __ovld __purefn vload3(size_t, const __constant half *);
 half4 __ovld __purefn vload4(size_t, const __constant half *);
@@ -11319,7 +11318,6 @@
 #endif //cl_khr_fp64
 
 #ifdef cl_khr_fp16
-half __ovld __purefn vload(size_t, const half *);
 half2 __ovld __purefn vload2(size_t, const half *);
 half3 __ovld __purefn vload3(size_t, const half *);
 half4 __ovld __purefn vload4(size_t, const half *);
@@ -11484,19 +11482,16 @@
 #endif //cl_khr_fp64
 
 #ifdef cl_khr_fp16
-half __ovld __purefn vload(size_t, const __global half *);
 half2 __ovld __purefn vload2(size_t, const __global half *);
 half3 __ovld __purefn vload3(size_t, const __global half *);
 half4 __ovld __purefn vload4(size_t, const __global half *);
 half8 __ovld __purefn vload8(size_t, const __global half *);
 half16 __ovld __purefn vload16(size_t, const __global half *);
-half __ovld __purefn vload(size_t, const __local half *);
 half2 __ovld __purefn vload2(size_t, const __local half *);
 half3 __ovld __purefn vload3(size_t, const __local half *);
 half4 __ovld __purefn vload4(size_t, const __local half *);
 half8 __ovld __purefn vload8(size_t, const __local half *);
 half16 __ovld __purefn vload16(size_t, const __local half *);
-half __ovld __purefn vload(size_t, const __private half *);
 half2 __ovld __purefn vload2(size_t, const __private half *);
 half3 __ovld __purefn vload3(size_t, const __private half *);
 half4 __ovld __purefn vload4(size_t, const __private half *);
@@ -11559,7 +11554,6 @@
 void __ovld vstore16(double16, size_t, double *);
 #endif //cl_khr_fp64
 #ifdef cl_khr_fp16
-void __ovld vstore(half, size_t, half *);
 void __ovld vstore2(half2, size_t, half *);
 void __ovld vstore3(half3, size_t, half *);
 void __ovld vstore4(half4, size_t, half *);
@@ -11722,19 +11716,16 @@
 void __ovld vstore16(double16, size_t, __private double *);
 #endif //cl_khr_fp64
 #ifdef cl_khr_fp16
-void __ovld vstore(half, size_t, __global half *);
 void __ovld vstore2(half2, size_t, __global half *);
 void __ovld vstore3(half3, size_t, __global half *);
 void __ovld vstore4(half4, size_t, __global half *);
 void __ovld vstore8(half8, size_t, __global half *);
 void __ovld vstore16(half16, size_t, __global half *);
-void __ovld vstore(half, size_t, __local half *);
 void __ovld vstore2(half2, size_t, __local half *);
 void __ovld vstore3(half3, size_t, __local half *);
 void __ovld vstore4(half4, size_t, __local half *);
 void __ovld vstore8(half8, size_t, __local half *);
 void __ovld vstore16(half16, size_t, __local half *);
-void __ovld vstore(half, size_t, __private half *);
 void __ovld vstore2(half2, size_t, __private half *);
 void __ovld vstore3(half3, size_t, __private half *);
 void __ovld vstore4(half4, size_t, __private half *);