r251233 - in /trunk/gcc: ChangeLog function.c

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Mon Aug 21 14:52:43 2017
New Revision: 251233

URL: https://gcc.gnu.org/viewcvs?rev=251233&root=gcc&view=rev
Log:
Simplify pad_below implementation

This patch simplifies the alignment calculations in pad_below.
The first arm of the "if" was:

- taking GET_MODE_BITSIZE (always equal to GET_MODE_SIZE * BITS_PER_UNIT),
- rounding up to the next multiple of PARM_BOUNDARY
- converting bits to bytes and
- subtracting the GET_MODE_SIZE

so was in effect calculating the number of bytes needed to round
GET_MODE_SIZE up to (PARM_BOUNDARY / BITS_PER_UNIT).  That can be
done more directly as -size & (align - 1), which is easier to
convert to variable-sized modes.

2017-08-21  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* function.c (pad_below): Simplify padding calculation.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/function.c