diff --git a/builtins/target-nvptx.ll b/builtins/target-nvptx.ll
index 3f609b85..4f523e54 100644
--- a/builtins/target-nvptx.ll
+++ b/builtins/target-nvptx.ll
@@ -1386,24 +1386,6 @@ extract_insert(i64, int64)
 extract_insert(float, float)
 extract_insert(double, double)
 
-define i8* @__extract_void(<1 x i8*>, i32) nounwind readnone alwaysinline {
-  %val = extractelement <1 x i8*> %0, i32 0
-  %b64 = ptrtoint i8* %val to i64
-  %extract64 = tail call i64 @__shfl_i64_nvptx(i64 %b64, i32 %1)
-  %extract = inttoptr i64 %extract64 to i8*
-  ret i8* %extract
-}
-
-define <1 x i8*> @__insert_void(<1 x i8*>, i32, 
-                                   i8*) nounwind readnone alwaysinline {
-  %orig = extractelement <1 x i8*> %0, i32 0
-  %lane = call i32 @__laneidx() 
-  %c    = icmp eq i32 %lane, %1
-  %val  = select i1 %c, i8* %2, i8* %orig
-  %insert = insertelement <1 x i8*> %0, i8* %val, i32 0
-  ret <1 x i8*> %insert
-}
-
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; assert