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re PR middle-end/30761 (Error: unsupported relocation against sfp) 

PR middle-end/30761
	* reload1.c (eliminate_regs_in_insn): In the single_set special
	case, attempt to re-recognize the insn before falling back to
	having reload fix it up.

From-SVN: r122199
This commit is contained in:
Ulrich Weigand 2007-02-21 15:05:01 +00:00 committed by Ulrich Weigand
parent 71d6fc6b0b
commit 551d69292f
2 changed files with 24 additions and 25 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2007-02-21 Ulrich Weigand <uweigand@de.ibm.com>
PR middle-end/30761
* reload1.c (eliminate_regs_in_insn): In the single_set special
case, attempt to re-recognize the insn before falling back to
having reload fix it up.
2007-02-20 Eric Christopher <echristo@gmail.com>
* config/frv/frv.c (frv_read_argument): Take a tree and int argument.

42
gcc/reload1.c
View File

@ -3105,35 +3105,15 @@ eliminate_regs_in_insn (rtx insn, int replace)
if (GET_CODE (XEXP (plus_cst_src, 0)) == SUBREG)
to_rtx = gen_lowpart (GET_MODE (XEXP (plus_cst_src, 0)),
to_rtx);
if (offset == 0)
{
int num_clobbers;
/* We assume here that if we need a PARALLEL with
CLOBBERs for this assignment, we can do with the
MATCH_SCRATCHes that add_clobbers allocates.
There's not much we can do if that doesn't work. */
PATTERN (insn) = gen_rtx_SET (VOIDmode,
SET_DEST (old_set),
to_rtx);
num_clobbers = 0;
INSN_CODE (insn) = recog (PATTERN (insn), insn, &num_clobbers);
if (num_clobbers)
{
rtvec vec = rtvec_alloc (num_clobbers + 1);
vec->elem[0] = PATTERN (insn);
PATTERN (insn) = gen_rtx_PARALLEL (VOIDmode, vec);
add_clobbers (PATTERN (insn), INSN_CODE (insn));
}
gcc_assert (INSN_CODE (insn) >= 0);
}
/* If we have a nonzero offset, and the source is already
a simple REG, the following transformation would
increase the cost of the insn by replacing a simple REG
with (plus (reg sp) CST). So try only when we already
had a PLUS before. */
else if (plus_src)
if (offset == 0 || plus_src)
{
rtx new_src = plus_constant (to_rtx, offset);
new_body = old_body;
if (! replace)
{
@ -3144,8 +3124,20 @@ eliminate_regs_in_insn (rtx insn, int replace)
PATTERN (insn) = new_body;
old_set = single_set (insn);
XEXP (SET_SRC (old_set), 0) = to_rtx;
XEXP (SET_SRC (old_set), 1) = GEN_INT (offset);
/* First see if this insn remains valid when we make the
change. If not, try to replace the whole pattern with
a simple set (this may help if the original insn was a
PARALLEL that was only recognized as single_set due to
REG_UNUSED notes). If this isn't valid either, keep
the INSN_CODE the same and let reload fix it up. */
if (!validate_change (insn, &SET_SRC (old_set), new_src, 0))
{
rtx new_pat = gen_rtx_SET (VOIDmode,
SET_DEST (old_set), new_src);
if (!validate_change (insn, &PATTERN (insn), new_pat, 0))
SET_SRC (old_set) = new_src;
}
}
else
break;