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Re: [Patch, moxie] Clean up prologue and epilogue

From: "Anthony Green" <green at moxielogic dot com>
To: "Richard Henderson" <rth at redhat dot com>
Cc: <gcc-patches at gcc dot gnu dot org>
Date: Thu, 2 Jul 2009 17:07:03 -0400
Subject: Re: [Patch, moxie] Clean up prologue and epilogue
References: <1246497478.7124.5.camel@localhost.localdomain> <4A4D07E9.4090206@redhat.com>

Richard wrote:

-      insn = emit_move_insn (stack_pointer_rtx, reg);
-      RTX_FRAME_RELATED_P (insn) = 1;
-      add_reg_note (insn, REG_CFA_DEF_CFA,
-     plus_constant (stack_pointer_rtx,
-    cfun->machine->callee_saved_reg_size));
+      if (cfun->machine->callee_saved_reg_size <= 255)
+ {
+   emit_move_insn (reg, hard_frame_pointer_rtx);
+   emit_insn (gen_subsi3
+      (reg, reg,
+       GEN_INT (cfun->machine->callee_saved_reg_size)));
+ }
+      else
+ {
+   emit_move_insn (reg,
+   GEN_INT (-cfun->machine->callee_saved_reg_size));
+   emit_insn (gen_addsi3 (reg, reg, hard_frame_pointer_rtx));
+ }
       for (regno = FIRST_PSEUDO_REGISTER; regno-- > 0; )

You lost all the epilogue unwind notes.

But I'm not adjusting the stack pointer anymore. Is this still important?

AG

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