rs6000: Some rs6000_emit_epilogue improvements
This uses epilogue_type directly. It also changes some ints to bools,
declares variables later, and simplifies some code.
There is one actual change:
else if (info->push_p
&& DEFAULT_ABI != ABI_V4
- && !crtl->calls_eh_return)
+ && epilogue_type != EPILOGUE_TYPE_EH_RETURN)
{
/* Prevent reordering memory accesses against stack pointer restore. */
(different because calls_eh_return can be true for sibcalls). This is
a bugfix. The code was never exercised.
One place in the epilogue still uses crtl->calls_eh_return. If that
is changed the prologue has to have a corresponding change, and the
emit_prologue function does not have an epilogue_type parameter, so
bail on changing this for now. We might want to do this (saving the
CR fields to separate stack slots) always, not just for functions
calling eh_return, but that will require more investigation.
* config/rs6000/rs6000.c (restore_saved_cr): Change a boolean
argument to be type bool (was int before).
(rs6000_emit_epilogue): Simplify some code. Declare some variables
at first use. Use type bool for some variables. Fix a theoretical
eh_return bug for svr4.
From-SVN: r271361