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re PR middle-end/30751 (internal compiler error: in extract_insn, at recog.c:2108)

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PR middle-end/30751
	* lower-subreg.c (resolve_simple_move): Decompose subregs in
	addresses.

From-SVN: r121894
This commit is contained in:
Ian Lance Taylor 2007-02-13 22:18:26 +00:00 • committed by Ian Lance Taylor
parent 291f172e62
commit 30d18db484
2 changed files with 24 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2007-02-13 Ian Lance Taylor <iant@google.com>
PR middle-end/30751
* lower-subreg.c (resolve_simple_move): Decompose subregs in
addresses.
2007-02-13 Stuart Hastings <stuart@apple.com>
* gcc/config/i386/i386.md (fixuns_truncdfhi2): Require SSE2.

19
gcc/lower-subreg.c
View file

@ -501,7 +501,7 @@ resolve_subreg_use (rtx *px, void *data)
that the note must be removed. */
if (!x)
{
gcc_assert(!insn);
gcc_assert (!insn);
return 1;
}
@ -711,6 +711,23 @@ resolve_simple_move (rtx set, rtx insn)
return insn;
}
/* It's possible for the code to use a subreg of a decomposed
register while forming an address. We need to handle that before
passing the address to emit_move_insn. We pass NULL_RTX as the
insn parameter to resolve_subreg_use because we can not validate
the insn yet. */
if (MEM_P (src) || MEM_P (dest))
{
int acg;
if (MEM_P (src))
for_each_rtx (&XEXP (src, 0), resolve_subreg_use, NULL_RTX);
if (MEM_P (dest))
for_each_rtx (&XEXP (dest, 0), resolve_subreg_use, NULL_RTX);
acg = apply_change_group ();
gcc_assert (acg);
}
/* If SRC is a register which we can't decompose, or has side
effects, we need to move via a temporary register. */