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re PR debug/36977 (Incorrect debug info for stack variables with stack alignment)

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2008-07-31  H.J. Lu  <hongjiu.lu@intel.com>

	PR debug/36977
	* cfgexpand.c (expand_stack_alignment): Set stack_realign_tried.

	* dwarf2out.c (based_loc_descr): Check crtl->stack_realign_tried
	for stack alignment.

	* function.h (rtl_data): Add stack_realign_tried.  Update
	comments.

From-SVN: r138438
This commit is contained in:
H.J. Lu 2008-07-31 21:28:54 +00:00 • committed by H.J. Lu
parent c983efcec6
commit d2d93c32dc
4 changed files with 24 additions and 8 deletions
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11
gcc/ChangeLog
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@ -1,3 +1,14 @@
2008-07-31 H.J. Lu <hongjiu.lu@intel.com>
PR debug/36977
* cfgexpand.c (expand_stack_alignment): Set stack_realign_tried.
* dwarf2out.c (based_loc_descr): Check crtl->stack_realign_tried
for stack alignment.
* function.h (rtl_data): Add stack_realign_tried. Update
comments.
2008-07-31 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/sh.c (sh_canonical_va_list_type): Remove.

1
gcc/cfgexpand.c
View file

@ -2217,6 +2217,7 @@ expand_stack_alignment (void)
crtl->stack_realign_needed
= INCOMING_STACK_BOUNDARY < crtl->stack_alignment_estimated;
crtl->stack_realign_tried = crtl->stack_realign_needed;
crtl->stack_realign_processed = true;

3
gcc/dwarf2out.c
View file

@ -9453,8 +9453,7 @@ based_loc_descr (rtx reg, HOST_WIDE_INT offset,
pointer + offset to access stack variables. If stack
is aligned without drap, use stack pointer + offset to
access stack variables. */
if (fde
&& fde->stack_realign
if (crtl->stack_realign_tried
&& cfa.reg == HARD_FRAME_POINTER_REGNUM
&& reg == frame_pointer_rtx)
{

17
gcc/function.h
View file

@ -417,20 +417,25 @@ struct rtl_data GTY(())
/* When set, expand should optimize for speed. */
bool maybe_hot_insn_p;
/* Nonzero if function stack realignment is needed. This flag may be
set twice: before and after reload. It is set before reload wrt
stack alignment estimation before reload. It will be changed after
reload if by then criteria of stack realignment is different.
/* Nonzero if function stack realignment is needed. This flag may be
set twice: before and after reload. It is set before reload wrt
stack alignment estimation before reload. It will be changed after
reload if by then criteria of stack realignment is different.
The value set after reload is the accurate one and is finalized. */
bool stack_realign_needed;
/* Nonzero if function stack realignment is tried. This flag is set
only once before reload. It affects register elimination. This
is used to generate DWARF debug info for stack variables. */
bool stack_realign_tried;
/* Nonzero if function being compiled needs dynamic realigned
argument pointer (drap) if stack needs realigning. */
bool need_drap;
/* Nonzero if function stack realignment estimation is done, namely
stack_realign_needed flag has been set before reload wrt
estimated stack alignment info. */
stack_realign_needed flag has been set before reload wrt estimated
stack alignment info. */
bool stack_realign_processed;
/* Nonzero if function stack realignment has been finalized, namely