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* lower-subreg.c (resolve_clobber): Handle a subreg of a concatn. 

From-SVN: r121493
This commit is contained in:
Ian Lance Taylor 2007-02-02 07:20:35 +00:00 committed by Ian Lance Taylor
parent 114e4d106d
commit 9a5a8e58d2
2 changed files with 8 additions and 3 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2007-02-01 Ian Lance Taylor <iant@google.com>
* lower-subreg.c (resolve_clobber): Handle a subreg of a concatn.
2007-02-01 Guy Martin <gmsoft@gentoo.org>
* pa.md (tp_load): Correct mfctl instruction syntax.

7
gcc/lower-subreg.c
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@ -807,19 +807,20 @@ resolve_clobber (rtx pat, rtx insn)
unsigned int words, i;
reg = XEXP (pat, 0);
if (!resolve_reg_p (reg))
if (!resolve_reg_p (reg) && !resolve_subreg_p (reg))
return false;
orig_mode = GET_MODE (reg);
words = GET_MODE_SIZE (orig_mode);
words = (words + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
XEXP (pat, 0) = simplify_subreg_concatn (word_mode, reg, 0);
XEXP (pat, 0) = simplify_gen_subreg_concatn (word_mode, reg, orig_mode, 0);
for (i = words - 1; i > 0; --i)
{
rtx x;
x = simplify_subreg_concatn (word_mode, reg, i * UNITS_PER_WORD);
x = simplify_gen_subreg_concatn (word_mode, reg, orig_mode,
i * UNITS_PER_WORD);
x = gen_rtx_CLOBBER (VOIDmode, x);
emit_insn_after (x, insn);
}