PR optimization/12142
* cse.c (count_reg_usage): In a SET with a REG SET_DEST, count the
uses of the register in the SET_SRC. Remove unnecessary argument.
* pa.c (legitimize_pic_address): Before reload, use a scratch register
for the intermediate result in loading the address of a SYMBOL_REF.
Set the MEM_NOTRAP_P flag for the MEM. Add a REG_EQUAL to the insn
which loads the SYMBOL_REF address.
From-SVN: r72234
