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re PR middle-end/78468 (libgomp.c/reduction-10.c and many more FAIL)

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PR middle-end/78468
	* emit-rtl.c (init_emit): Add ??? comment for problematic alignment
	settings of the virtual registers.

	Revert again
	2016-08-23  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	* explow.c (get_dynamic_stack_size): Take known alignment of stack
	pointer + STACK_DYNAMIC_OFFSET into account when calculating the size
	needed.

From-SVN: r245124
This commit is contained in:
Eric Botcazou 2017-02-02 12:39:09 +00:00 • committed by Eric Botcazou
parent aa2cbb1a6c
commit da75ca93f8
3 changed files with 19 additions and 9 deletions
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13
gcc/ChangeLog
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@ -1,3 +1,16 @@
2017-02-02 Eric Botcazou <ebotcazou@adacore.com>
PR middle-end/78468
* emit-rtl.c (init_emit): Add ??? comment for problematic alignment
settings of the virtual registers.
Revert again
2016-08-23 Dominik Vogt <vogt@linux.vnet.ibm.com>
* explow.c (get_dynamic_stack_size): Take known alignment of stack
pointer + STACK_DYNAMIC_OFFSET into account when calculating the size
needed.
2017-02-02 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* config/s390/vx-builtins.md ("vec_ceil", "vec_floor")

3
gcc/emit-rtl.c
View file

@ -5725,10 +5725,13 @@ init_emit (void)
REGNO_POINTER_ALIGN (HARD_FRAME_POINTER_REGNUM) = STACK_BOUNDARY;
REGNO_POINTER_ALIGN (ARG_POINTER_REGNUM) = STACK_BOUNDARY;
/* ??? These are problematic (for example, 3 out of 4 are wrong on
32-bit SPARC and cannot be all fixed because of the ABI). */
REGNO_POINTER_ALIGN (VIRTUAL_INCOMING_ARGS_REGNUM) = STACK_BOUNDARY;
REGNO_POINTER_ALIGN (VIRTUAL_STACK_VARS_REGNUM) = STACK_BOUNDARY;
REGNO_POINTER_ALIGN (VIRTUAL_STACK_DYNAMIC_REGNUM) = STACK_BOUNDARY;
REGNO_POINTER_ALIGN (VIRTUAL_OUTGOING_ARGS_REGNUM) = STACK_BOUNDARY;
REGNO_POINTER_ALIGN (VIRTUAL_CFA_REGNUM) = BITS_PER_WORD;
#endif

12
gcc/explow.c
View file

@ -1233,15 +1233,9 @@ get_dynamic_stack_size (rtx *psize, unsigned size_align,
example), so we must preventively align the value. We leave space
in SIZE for the hole that might result from the alignment operation. */
unsigned known_align = REGNO_POINTER_ALIGN (VIRTUAL_STACK_DYNAMIC_REGNUM);
if (known_align == 0)
known_align = BITS_PER_UNIT;
if (required_align > known_align)
{
extra = (required_align - known_align) / BITS_PER_UNIT;
size = plus_constant (Pmode, size, extra);
size = force_operand (size, NULL_RTX);
}
extra = (required_align - BITS_PER_UNIT) / BITS_PER_UNIT;
size = plus_constant (Pmode, size, extra);
size = force_operand (size, NULL_RTX);
if (flag_stack_usage_info && pstack_usage_size)
*pstack_usage_size += extra;