re PR target/63534 (Bootstrap failure on x86_64/i686-linux)

re PR target/63534 (Bootstrap failure on x86_64/i686-linux)

gcc/

	PR target/63534
	* config/i386/i386.c (ix86_init_pic_reg): Emit SET_GOT to
	REAL_PIC_OFFSET_TABLE_REGNUM for mcount profiling.
	(ix86_save_reg): Save REAL_PIC_OFFSET_TABLE_REGNUM when profiling
	using mcount in 32bit PIC mode.
	(ix86_elim_entry_set_got): New.
	(ix86_expand_prologue): For the mcount profiling emit new SET_GOT
	in PROLOGUE, delete initial if possible.

gcc/testsuite/

	PR target/63534
	* gcc.target/i386/mcount_pic.c: New.

From-SVN: r216975