[PR96264] LRA: Check output insn hard regs when updating available rematerialization...

[PR96264] LRA: Check output insn hard regs when updating available rematerialization after the insn

 Insn for rematerialization can contain a clobbered hard register.  We
can not move such insn through another insn setting up the same hard
register.  The patch adds such check.

gcc/ChangeLog:

	PR rtl-optimization/96264
	* lra-remat.c (reg_overlap_for_remat_p): Check also output insn
	hard regs.

gcc/testsuite/ChangeLog:

	PR rtl-optimization/96264
	* gcc.target/powerpc/pr96264.c: New.