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reload.c (push_reload): When using a dying register for the reload register in an in-out reload... 

* reload.c (push_reload): When using a dying register for the reload
	register in an in-out reload, use outmode if wider than inmode.

From-SVN: r38373
This commit is contained in:
J"orn Rennecke 2000-12-19 00:42:31 +00:00 committed by Joern Rennecke
parent 3173ca6431
commit d0b6af711c
2 changed files with 14 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Tue Dec 19 00:37:08 2000 J"orn Rennecke <amylaar@redhat.com>
* reload.c (push_reload): When using a dying register for the reload
register in an in-out reload, use outmode if wider than inmode.
2000-12-19 Joseph S. Myers <jsm28@cam.ac.uk>
* config/d30v/d30v.h (EXIT_BODY): Update comment.

14
gcc/reload.c
View File

@ -1451,6 +1451,10 @@ push_reload (in, out, inloc, outloc, class,
{
rtx note;
int regno;
enum machine_mode rel_mode = inmode;
if (out && GET_MODE_SIZE (outmode) > GET_MODE_SIZE (inmode))
rel_mode = outmode;
for (note = REG_NOTES (this_insn); note; note = XEXP (note, 1))
if (REG_NOTE_KIND (note) == REG_DEAD
@ -1460,7 +1464,7 @@ push_reload (in, out, inloc, outloc, class,
&& ! refers_to_regno_for_reload_p (regno,
(regno
+ HARD_REGNO_NREGS (regno,
inmode)),
rel_mode)),
PATTERN (this_insn), inloc)
/* If this is also an output reload, IN cannot be used as
the reload register if it is set in this insn unless IN
@ -1469,7 +1473,7 @@ push_reload (in, out, inloc, outloc, class,
|| ! hard_reg_set_here_p (regno,
(regno
+ HARD_REGNO_NREGS (regno,
inmode)),
rel_mode)),
PATTERN (this_insn)))
/* ??? Why is this code so different from the previous?
Is there any simple coherent way to describe the two together?
@ -1481,9 +1485,9 @@ push_reload (in, out, inloc, outloc, class,
== ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (in)))
+ (UNITS_PER_WORD - 1)) / UNITS_PER_WORD))))
/* Make sure the operand fits in the reg that dies. */
&& GET_MODE_SIZE (inmode) <= GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
&& (GET_MODE_SIZE (rel_mode)
<= GET_MODE_SIZE (GET_MODE (XEXP (note, 0))))
&& HARD_REGNO_MODE_OK (regno, inmode)
&& GET_MODE_SIZE (outmode) <= GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
&& HARD_REGNO_MODE_OK (regno, outmode))
{
unsigned int offs;
@ -1498,7 +1502,7 @@ push_reload (in, out, inloc, outloc, class,
if (offs == nregs)
{
rld[i].reg_rtx = gen_rtx_REG (inmode, regno);
rld[i].reg_rtx = gen_rtx_REG (rel_mode, regno);
break;
}
}