tighter late_buffer_view match [pr] (tinygrad#14456)

src must be len 2 at that point

Author: chenyuxyz

tinygrad/schedule/rangeify.py

@@ -280,10 +280,10 @@ def late_buffer_view(t:UOp, b:UOp):
   if len(shape) == 0: offset = x.src[1].arg
   else: offset = max(sum(idx.vmin for idx in x.src[1:]), 0)
 
-  return b.replace(src=(UOp(Ops.BUFFER_VIEW, t.dtype, (x.base,), (size, offset), tag=t.tag),) + b.src[1:])
+  return b.replace(src=(UOp(Ops.BUFFER_VIEW, t.dtype, (x.base,), (size, offset), tag=t.tag), b.src[1]))
 
 to_bufferview = PatternMatcher([
-  (UPat((Ops.BITCAST, Ops.CONTIGUOUS), name="t").f(Ops.BUFFERIZE, allow_any_len=True, name="b"), late_buffer_view),
+  (UPat(Ops.BUFFERIZE, src=(UPat((Ops.BITCAST, Ops.CONTIGUOUS), name="t"), UPat()), name="b"), late_buffer_view),
   (UPat((Ops.BITCAST, Ops.CONTIGUOUS)).f(Ops.BUFFER_VIEW, name="b"), lambda b: b.replace(src=b.src[0].src)),
 ])