diff --git a/builtins/util.m4 b/builtins/util.m4
index 36ebdd2a..6dda67b9 100644
--- a/builtins/util.m4
+++ b/builtins/util.m4
@@ -569,10 +569,9 @@ divert`'dnl
 define(`shuffles', `
 define <WIDTH x $1> @__broadcast_$1(<WIDTH x $1>, i32) nounwind readnone alwaysinline {
   %v = extractelement <WIDTH x $1> %0, i32 %1
-  %r_0 = insertelement <WIDTH x $1> undef, $1 %v, i32 0
-forloop(i, 1, eval(WIDTH-1), `  %r_`'i = insertelement <WIDTH x $1> %r_`'eval(i-1), $1 %v, i32 i
-')
-  ret <WIDTH x $1> %r_`'eval(WIDTH-1)
+  %broadcast_init = insertelement <WIDTH x $1> undef, $1 %v, i32 0
+  %broadcast = shufflevector <WIDTH x $1> %broadcast_init, <WIDTH x $1> undef, <WIDTH x i32> zeroinitializer 
+  ret <WIDTH x $1> %broadcast
 }
 
 define <WIDTH x $1> @__rotate_$1(<WIDTH x $1>, i32) nounwind readnone alwaysinline {