LoongArch: Fix bug123766.

The pointer parameter type for the original store class builtin
functions is CVPOINTER (const volatile void *).
Taking the following test as an example:

	```
	v4i64 v = {0, 0, 0, 0};
	void try_store() {
  	  long r[4];
  	  __lasx_xvst(v, r, 0);
	}
	```
At this point, the type of r is CVPOINTER, which means data in memory
can only be read through r.  Therefore, if the array r is not
initialized, an uninitialized warning will be issued.
This patch changes the pointer type of store-class builtin functions
from CVPOINTER to VPOINTER (volatile void *).

	PR target/123766

gcc/ChangeLog:

	* config/loongarch/loongarch-builtins.cc
	(loongarch_build_vpointer_type): New function.  Return a type
	for 'volatile void *'.
	(LARCH_ATYPE_VPOINTER): New macro.
	* config/loongarch/loongarch-ftypes.def: Change the pointer
	type of the store class function from CVPOINTER to VPOINTER.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/vector/lasx/pr123766.c: New test.
	* gcc.target/loongarch/vector/lsx/pr123766.c: New test.

0 files changed, 0 insertions, 0 deletions