[PR104400] LRA: Modify exclude start hard register calculation for insn alternative

v850 target has an interesting insn alternative constraint 'e!r' where e
denotes even general regs and e is a subset of r.  We cannot just make
union of exclude start hard registers for e and r and should use only
exclude start hard registers of r.  The following patch implements this.

gcc/ChangeLog:

	PR rtl-optimization/104400
	* lra-constraints.cc (process_alt_operands): Don't make union of
	this_alternative_exclude_start_hard_regs when reg class in insn
	alternative covers other reg classes in the same alternative.

gcc/testsuite/ChangeLog:

	PR rtl-optimization/104400
	* gcc.target/v850/pr104400.c: New.
	* gcc.target/v850/v850.exp: New.

0 files changed, 0 insertions, 0 deletions