match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499]

match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499]

The following testcase ICEs on x86_64-linux, because match.pd emits
there a NOP_EXPR cast from int*8 vector type with BLKmode to
unsigned*8 vector type with BLKmode and vec-lowering isn't prepared
to handle such casts.

Fixed by using VIEW_CONVERT_EXPR instead.

2022-02-11  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/104499
	* match.pd ((X & Y) CMP 0 -> X CMP2 ~Y): Use view_convert instead
	of convert.

	* gcc.c-torture/compile/pr104499.c: New test.