Gunther Nikl wrote:
Hello!
I am trying to add instructions into function prologue/epilogue. These
instructions shall save and load "fixed" registers to avoid assembly.
Register saving in the prologue appears to work. The restore code in the
epilogue aborts in flow.c/propagate_one_insn with
"Attempt to delete prologue/epilogue insn"
unless the stackslot was marked with MEM_VOLATILE_P. I don't think thats
the proper fix.
you can add a (USE reg) after the restore in the prologue. Then flow considers
the register, and the preceding load, to be live at that point.
nathan
--
Nathan Sidwell :: http://www.codesourcery.com :: CodeSourcery LLC
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