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[AArch64] Add an assert to aarch64_layout_frame

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This patch adds an assert that all the individual *_adjust allocations
add up to the full frame size.  With that safety net, it seemed slightly
clearer to use crtl->outgoing_args_size as the final adjustment where
appropriate, to match what's used in the comments.

This is a bit overkill on its own, but I need to add more cases for SVE.

2019-10-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64.c (aarch64_layout_frame): Assert
	that all the adjustments add up to the full frame size.
	Use crtl->outgoing_args_size directly as the final adjustment
	where appropriate.

From-SVN: r277060
This commit is contained in:
Richard Sandiford 2019-10-16 10:48:00 +00:00 committed by Richard Sandiford
parent ab43763e51
commit 8e66b377a9
2 changed files with 14 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2019-10-16 Richard Sandiford <richard.sandiford@arm.com>
* config/aarch64/aarch64.c (aarch64_layout_frame): Assert
that all the adjustments add up to the full frame size.
Use crtl->outgoing_args_size directly as the final adjustment
where appropriate.
2019-10-16 Richard Sandiford <richard.sandiford@arm.com>
* config/aarch64/aarch64.c (aarch64_layout_frame): Use a local

9
gcc/config/aarch64/aarch64.c
View File

@ -5476,7 +5476,7 @@ aarch64_layout_frame (void)
stp reg3, reg4, [sp, 16]
sub sp, sp, outgoing_args_size */
frame.callee_adjust = const_fp_offset;
frame.final_adjust = frame.frame_size - frame.callee_adjust;
frame.final_adjust = crtl->outgoing_args_size;
}
else
{
@ -5487,9 +5487,14 @@ aarch64_layout_frame (void)
stp reg3, reg4, [sp, 16]
sub sp, sp, outgoing_args_size */
frame.initial_adjust = frame.hard_fp_offset;
frame.final_adjust = frame.frame_size - frame.initial_adjust;
frame.final_adjust = crtl->outgoing_args_size;
}
/* Make sure the individual adjustments add up to the full frame size. */
gcc_assert (known_eq (frame.initial_adjust
+ frame.callee_adjust
+ frame.final_adjust, frame.frame_size));
frame.laid_out = true;
}