re PR inline-asm/55934 (LRA inline asm error recovery)

re PR inline-asm/55934 (LRA inline asm error recovery)

gcc/

	PR inline-asm/55934
	* lra-assigns.c (assign_by_spills): Throw away the pattern of asms
	that have operands with impossible constraints.
	Add a FIXME for a speed-up opportunity.
	* lra-constraints.c (process_alt_operands): Verify that a class
	selected from constraints on asms is valid for the operand mode.
	(curr_insn_transform): Remove incorrect comment.

testsuite/

	PR inline-asm/55934
	* gcc.target/i386/pr55934.c: New test.

From-SVN: r195420