Thanks for reviewing! Somehow I missed seeing your OK in yesterday's
email. I have far too many emails in my inbox.. Patch series
committed as revisions 223424, 223425, 223426, and 223427. I made a
change to the comment for rs6000_supports_split_stack, instead of
/* -fsplit-stack uses a field
This small refinement to the -fsplit-stack prologue arg pointer
initialization improves code generation. Compare the -O2
gcc/testsuite/gcc.dg/split-3.c code for down() below.
beforeafter
mflr 0mflr 0
std 31,-8(1)std 31,-8(1)
std 0,16(1)mr 12,1
