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always define INITIAL_FRAME_ADDRESS_RTX

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gcc/ChangeLog:

2015-10-10  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* builtins.c (expand_builtin_return_addr): Adjust.
	* defaults.h (INITIAL_FRAME_ADDRESS_RTX): New default definition.

From-SVN: r228685
This commit is contained in:
Trevor Saunders 2015-10-11 00:47:52 +00:00 committed by Trevor Saunders
parent 9c02b29a87
commit 579f294624
3 changed files with 27 additions and 21 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-10-10 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* builtins.c (expand_builtin_return_addr): Adjust.
* defaults.h (INITIAL_FRAME_ADDRESS_RTX): New default definition.
2015-10-10 Jan Hubicka <hubicka@ucw.cz>
* tree.c (type_with_interoperable_signedness): New.

39
gcc/builtins.c
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@ -761,31 +761,28 @@ static rtx
expand_builtin_return_addr (enum built_in_function fndecl_code, int count)
{
int i;
#ifdef INITIAL_FRAME_ADDRESS_RTX
rtx tem = INITIAL_FRAME_ADDRESS_RTX;
#else
rtx tem;
/* For a zero count with __builtin_return_address, we don't care what
frame address we return, because target-specific definitions will
override us. Therefore frame pointer elimination is OK, and using
the soft frame pointer is OK.
For a nonzero count, or a zero count with __builtin_frame_address,
we require a stable offset from the current frame pointer to the
previous one, so we must use the hard frame pointer, and
we must disable frame pointer elimination. */
if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS)
tem = frame_pointer_rtx;
else
if (tem == NULL_RTX)
{
tem = hard_frame_pointer_rtx;
/* For a zero count with __builtin_return_address, we don't care what
frame address we return, because target-specific definitions will
override us. Therefore frame pointer elimination is OK, and using
the soft frame pointer is OK.
/* Tell reload not to eliminate the frame pointer. */
crtl->accesses_prior_frames = 1;
For a nonzero count, or a zero count with __builtin_frame_address,
we require a stable offset from the current frame pointer to the
previous one, so we must use the hard frame pointer, and
we must disable frame pointer elimination. */
if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS)
tem = frame_pointer_rtx;
else
{
tem = hard_frame_pointer_rtx;
/* Tell reload not to eliminate the frame pointer. */
crtl->accesses_prior_frames = 1;
}
}
#endif
/* Some machines need special handling before we can access
arbitrary frames. For example, on the SPARC, we must first flush

4
gcc/defaults.h
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@ -1277,6 +1277,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#define CONSTANT_ALIGNMENT(EXP, ALIGN) ALIGN
#endif
#ifndef INITIAL_FRAME_ADDRESS_RTX
#define INITIAL_FRAME_ADDRESS_RTX NULL
#endif
#ifdef GCC_INSN_FLAGS_H
/* Dependent default target macro definitions