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re PR debug/63623 (Lots of functions get -fvar-tracking silently turned off unnecessarily) 

PR debug/63623
	* var-tracking.c (stack_adjust_offset_pre_post_cb): New function.
	(stack_adjust_offset_pre_post): Use it through for_each_inc_dec,
	instead of only handling autoinc in dest if it is a MEM.
	(vt_stack_adjustments): Fix up formatting.

From-SVN: r216600
This commit is contained in:
Jakub Jelinek 2014-10-23 23:58:41 +02:00 committed by Jakub Jelinek
parent 53b0f7471a
commit 41b9329e73
2 changed files with 50 additions and 65 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2014-10-23 Jakub Jelinek <jakub@redhat.com>
PR debug/63623
* var-tracking.c (stack_adjust_offset_pre_post_cb): New function.
(stack_adjust_offset_pre_post): Use it through for_each_inc_dec,
instead of only handling autoinc in dest if it is a MEM.
(vt_stack_adjustments): Fix up formatting.
2014-10-23 DJ Delorie <dj@redhat.com>
* config/msp430/msp430.c (msp430_print_operand): 'x' modifier is

107
gcc/var-tracking.c
View File

@ -700,6 +700,39 @@ static void vt_add_function_parameters (void);
static bool vt_initialize (void);
static void vt_finalize (void);
/* Callback for stack_adjust_offset_pre_post, called via for_each_inc_dec. */
static int
stack_adjust_offset_pre_post_cb (rtx, rtx op, rtx dest, rtx src, rtx srcoff,
void *arg)
{
if (dest != stack_pointer_rtx)
return 0;
switch (GET_CODE (op))
{
case PRE_INC:
case PRE_DEC:
((HOST_WIDE_INT *)arg)[0] -= INTVAL (srcoff);
return 0;
case POST_INC:
case POST_DEC:
((HOST_WIDE_INT *)arg)[1] -= INTVAL (srcoff);
return 0;
case PRE_MODIFY:
case POST_MODIFY:
/* We handle only adjustments by constant amount. */
gcc_assert (GET_CODE (src) == PLUS
&& CONST_INT_P (XEXP (src, 1))
&& XEXP (src, 0) == stack_pointer_rtx);
((HOST_WIDE_INT *)arg)[GET_CODE (op) == POST_MODIFY]
-= INTVAL (XEXP (src, 1));
return 0;
default:
gcc_unreachable ();
}
}
/* Given a SET, calculate the amount of stack adjustment it contains
PRE- and POST-modifying stack pointer.
This function is similar to stack_adjust_offset. */
@ -725,68 +758,12 @@ stack_adjust_offset_pre_post (rtx pattern, HOST_WIDE_INT *pre,
*post += INTVAL (XEXP (src, 1));
else
*post -= INTVAL (XEXP (src, 1));
return;
}
else if (MEM_P (dest))
{
/* (set (mem (pre_dec (reg sp))) (foo)) */
src = XEXP (dest, 0);
code = GET_CODE (src);
switch (code)
{
case PRE_MODIFY:
case POST_MODIFY:
if (XEXP (src, 0) == stack_pointer_rtx)
{
rtx val = XEXP (XEXP (src, 1), 1);
/* We handle only adjustments by constant amount. */
gcc_assert (GET_CODE (XEXP (src, 1)) == PLUS &&
CONST_INT_P (val));
if (code == PRE_MODIFY)
*pre -= INTVAL (val);
else
*post -= INTVAL (val);
break;
}
return;
case PRE_DEC:
if (XEXP (src, 0) == stack_pointer_rtx)
{
*pre += GET_MODE_SIZE (GET_MODE (dest));
break;
}
return;
case POST_DEC:
if (XEXP (src, 0) == stack_pointer_rtx)
{
*post += GET_MODE_SIZE (GET_MODE (dest));
break;
}
return;
case PRE_INC:
if (XEXP (src, 0) == stack_pointer_rtx)
{
*pre -= GET_MODE_SIZE (GET_MODE (dest));
break;
}
return;
case POST_INC:
if (XEXP (src, 0) == stack_pointer_rtx)
{
*post -= GET_MODE_SIZE (GET_MODE (dest));
break;
}
return;
default:
return;
}
}
HOST_WIDE_INT res[2] = { 0, 0 };
for_each_inc_dec (pattern, stack_adjust_offset_pre_post_cb, res);
*pre += res[0];
*post += res[1];
}
/* Given an INSN, calculate the amount of stack adjustment it contains
@ -836,10 +813,10 @@ vt_stack_adjustments (void)
/* Initialize entry block. */
VTI (ENTRY_BLOCK_PTR_FOR_FN (cfun))->visited = true;
VTI (ENTRY_BLOCK_PTR_FOR_FN (cfun))->in.stack_adjust =
INCOMING_FRAME_SP_OFFSET;
VTI (ENTRY_BLOCK_PTR_FOR_FN (cfun))->out.stack_adjust =
INCOMING_FRAME_SP_OFFSET;
VTI (ENTRY_BLOCK_PTR_FOR_FN (cfun))->in.stack_adjust
= INCOMING_FRAME_SP_OFFSET;
VTI (ENTRY_BLOCK_PTR_FOR_FN (cfun))->out.stack_adjust
= INCOMING_FRAME_SP_OFFSET;
/* Allocate stack for back-tracking up CFG. */
stack = XNEWVEC (edge_iterator, n_basic_blocks_for_fn (cfun) + 1);