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Optimize moxie function prologues

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From-SVN: r191088
This commit is contained in:
Anthony Green 2012-09-08 01:14:22 +00:00 committed by Anthony Green
parent e4d8437d70
commit 55a514601b
2 changed files with 22 additions and 5 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-09-07 Anthony Green <green@moxielogic.com>
* config/moxie/moxie.c (moxie_expand_prologue): Optimize prologue
for functions with large static stack requirements.
(moxie_expand_epilogue): Use $r12 instead of $r5 for pulling saved
values off of the stack.
2012-09-07 Nick Clifton <nickc@redhat.com>
* config/v850/v850.h (DBX_DEBUGGING_INFO): Define.

20
gcc/config/moxie/moxie.c
View File

@ -1,5 +1,5 @@
/* Target Code for moxie
Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation
Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation
Contributed by Anthony Green.
This file is part of GCC.
@ -293,8 +293,8 @@ moxie_expand_prologue (void)
if (cfun->machine->size_for_adjusting_sp > 0)
{
int i = cfun->machine->size_for_adjusting_sp;
while (i > 255)
int i = cfun->machine->size_for_adjusting_sp;
while ((i >= 255) && (i <= 510))
{
insn = emit_insn (gen_subsi3 (stack_pointer_rtx,
stack_pointer_rtx,
@ -302,13 +302,23 @@ moxie_expand_prologue (void)
RTX_FRAME_RELATED_P (insn) = 1;
i -= 255;
}
if (i > 0)
if (i <= 255)
{
insn = emit_insn (gen_subsi3 (stack_pointer_rtx,
stack_pointer_rtx,
GEN_INT (i)));
RTX_FRAME_RELATED_P (insn) = 1;
}
else
{
rtx reg = gen_rtx_REG (SImode, MOXIE_R12);
insn = emit_move_insn (reg, GEN_INT (i));
RTX_FRAME_RELATED_P (insn) = 1;
insn = emit_insn (gen_subsi3 (stack_pointer_rtx,
stack_pointer_rtx,
reg));
RTX_FRAME_RELATED_P (insn) = 1;
}
}
}
@ -320,7 +330,7 @@ moxie_expand_epilogue (void)
if (cfun->machine->callee_saved_reg_size != 0)
{
reg = gen_rtx_REG (Pmode, MOXIE_R5);
reg = gen_rtx_REG (Pmode, MOXIE_R12);
if (cfun->machine->callee_saved_reg_size <= 255)
{
emit_move_insn (reg, hard_frame_pointer_rtx);