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rx.c (push_regs): New function.

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* config/rx/rx.c (push_regs): New function.  Extracts code from...
	(rx_expand_prologue): ... here.  Use push_regs to push even small
	spans of registers.
	(pop_regs): New function.
	(rx_expand_epilogue):  Use pop_regs to pop even small spans of
	registers.

From-SVN: r223799
This commit is contained in:
Nick Clifton 2015-05-28 07:16:51 +00:00 • committed by Nick Clifton
parent 1a4b99c172
commit 55ffa75632
2 changed files with 61 additions and 21 deletions
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9
gcc/ChangeLog
View file

@ -1,3 +1,12 @@
2015-05-28 Nick Clifton <nickc@redhat.com>
* config/rx/rx.c (push_regs): New function. Extracts code from...
(rx_expand_prologue): ... here. Use push_regs to push even small
spans of registers.
(pop_regs): New function.
(rx_expand_epilogue): Use pop_regs to pop even small spans of
registers.
2015-05-28 Richard Biener <rguenther@suse.de>
* tree-vectorizer.h (struct _slp_instance): Remove body_cost_vec

73
gcc/config/rx/rx.c
View file

@ -1567,6 +1567,10 @@ rx_get_stack_layout (unsigned int * lowest,
has specified --fixed-<reg-name> on the command line and in such
circumstances we do not want to touch the fixed registers at all.
Note also that the code in the prologue/epilogue handlers will
automatically merge multiple PUSHes of adjacent registers into a single
PUSHM.
FIXME: Is it worth improving this heuristic ? */
pushed_mask = (-1 << low) & ~(-1 << (high + 1));
unneeded_pushes = (pushed_mask & (~ save_mask)) & pushed_mask;
@ -1716,6 +1720,19 @@ gen_safe_add (rtx dest, rtx src, rtx val, bool is_frame_related)
return;
}
static void
push_regs (unsigned int high, unsigned int low)
{
rtx insn;
if (low == high)
insn = emit_insn (gen_stack_push (gen_rtx_REG (SImode, low)));
else
insn = emit_insn (gen_stack_pushm (GEN_INT (((high - low) + 1) * UNITS_PER_WORD),
gen_rx_store_vector (low, high)));
mark_frame_related (insn);
}
void
rx_expand_prologue (void)
{
@ -1725,7 +1742,6 @@ rx_expand_prologue (void)
unsigned int low;
unsigned int high;
unsigned int reg;
rtx insn;
/* Naked functions use their own, programmer provided prologues. */
if (is_naked_func (NULL_TREE))
@ -1735,7 +1751,7 @@ rx_expand_prologue (void)
if (flag_stack_usage_info)
current_function_static_stack_size = frame_size + stack_size;
/* If we use any of the callee-saved registers, save them now. */
if (mask)
{
@ -1743,20 +1759,25 @@ rx_expand_prologue (void)
for (reg = CC_REGNUM; reg --;)
if (mask & (1 << reg))
{
insn = emit_insn (gen_stack_push (gen_rtx_REG (SImode, reg)));
mark_frame_related (insn);
low = high = reg;
/* Look for a span of registers.
Note - we do not have to worry about -Os and whether
it is better to use a single, longer PUSHM as
rx_get_stack_layout has already done that for us. */
while (reg-- > 0)
if ((mask & (1 << reg)) == 0)
break;
else
--low;
push_regs (high, low);
if (reg == (unsigned) -1)
break;
}
}
else if (low)
{
if (high == low)
insn = emit_insn (gen_stack_push (gen_rtx_REG (SImode, low)));
else
insn = emit_insn (gen_stack_pushm (GEN_INT (((high - low) + 1)
* UNITS_PER_WORD),
gen_rx_store_vector (low, high)));
mark_frame_related (insn);
}
push_regs (high, low);
if (MUST_SAVE_ACC_REGISTER)
{
@ -2031,6 +2052,16 @@ rx_can_use_simple_return (void)
&& low == 0);
}
static void
pop_regs (unsigned int high, unsigned int low)
{
if (high == low)
emit_insn (gen_stack_pop (gen_rtx_REG (SImode, low)));
else
emit_insn (gen_stack_popm (GEN_INT (((high - low) + 1) * UNITS_PER_WORD),
gen_rx_popm_vector (low, high)));
}
void
rx_expand_epilogue (bool is_sibcall)
{
@ -2143,16 +2174,16 @@ rx_expand_epilogue (bool is_sibcall)
{
for (reg = 0; reg < CC_REGNUM; reg ++)
if (register_mask & (1 << reg))
emit_insn (gen_stack_pop (gen_rtx_REG (SImode, reg)));
{
low = high = reg;
while (register_mask & (1 << high))
high ++;
pop_regs (high - 1, low);
reg = high;
}
}
else if (low)
{
if (high == low)
emit_insn (gen_stack_pop (gen_rtx_REG (SImode, low)));
else
emit_insn (gen_stack_popm (GEN_INT (regs_size),
gen_rx_popm_vector (low, high)));
}
pop_regs (high, low);
if (is_fast_interrupt_func (NULL_TREE))
{