OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Fix powerpc/rs6000 (subreg:SF (mem:SI ...)) reload problem. 

* reload.c (push_reload): In WORD_REGISTER_OPERATIONS code, add test
	to require the SUBREG mode to be smaller than the SUBREG_REG mode.
	* reload1.c (eliminate_regs): Likewise.

From-SVN: r17444
This commit is contained in:
Jim Wilson 1998-01-22 14:48:58 +00:00 committed by Jim Wilson
parent c485e6a0c9
commit 6d49a073b4
3 changed files with 22 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
Thu Jan 22 14:47:31 1998 Jim Wilson <wilson@cygnus.com>
* reload.c (push_reload): In WORD_REGISTER_OPERATIONS code, add test
to require the SUBREG mode to be smaller than the SUBREG_REG mode.
* reload1.c (eliminate_regs): Likewise.
Thu Jan 22 14:49:14 1998 Jeffrey A Law (law@cygnus.com)
* regmove.c (find_matches): Initialize matches->earlyclobber too.

8
gcc/reload.c
View File

@ -987,9 +987,11 @@ push_reload (in, out, inloc, outloc, class,
&& ((GET_MODE_SIZE (outmode)
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (out))))
#ifdef WORD_REGISTER_OPERATIONS
|| ((GET_MODE_SIZE (outmode) - 1) / UNITS_PER_WORD ==
((GET_MODE_SIZE (GET_MODE (SUBREG_REG (out))) - 1)
/ UNITS_PER_WORD))
|| ((GET_MODE_SIZE (outmode)
< GET_MODE_SIZE (GET_MODE (SUBREG_REG (out))))
&& ((GET_MODE_SIZE (outmode) - 1) / UNITS_PER_WORD ==
((GET_MODE_SIZE (GET_MODE (SUBREG_REG (out))) - 1)
/ UNITS_PER_WORD)))
#endif
))
|| (GET_CODE (SUBREG_REG (out)) == REG

20
gcc/reload1.c
View File

@ -3122,17 +3122,19 @@ eliminate_regs (x, mem_mode, insn)
int new_size = GET_MODE_SIZE (GET_MODE (new));
if (GET_CODE (new) == MEM
&& x_size <= new_size
&& ((x_size < new_size
#ifdef WORD_REGISTER_OPERATIONS
/* On these machines, combine can create rtl of the form
(set (subreg:m1 (reg:m2 R) 0) ...)
where m1 < m2, and expects something interesting to
happen to the entire word. Moreover, it will use the
(reg:m2 R) later, expecting all bits to be preserved.
So if the number of words is the same, preserve the
subreg so that push_reloads can see it. */
&& ! ((x_size-1)/UNITS_PER_WORD == (new_size-1)/UNITS_PER_WORD)
/* On these machines, combine can create rtl of the form
(set (subreg:m1 (reg:m2 R) 0) ...)
where m1 < m2, and expects something interesting to
happen to the entire word. Moreover, it will use the
(reg:m2 R) later, expecting all bits to be preserved.
So if the number of words is the same, preserve the
subreg so that push_reloads can see it. */
&& ! ((x_size-1)/UNITS_PER_WORD == (new_size-1)/UNITS_PER_WORD)
#endif
)
|| (x_size == new_size))
#ifdef LOAD_EXTEND_OP
/* On these machines we will be reloading what is
inside the SUBREG if it originally was a pseudo and