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* reload1.c (reload): Don't delete equiv insn if can throw. 

From-SVN: r46866
This commit is contained in:
Richard Kenner 2001-11-08 23:40:15 +00:00 committed by Richard Kenner
parent 66c60e6756
commit 7857151141
2 changed files with 12 additions and 3 deletions
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2
gcc/ChangeLog
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@ -1,5 +1,7 @@
Thu Nov 8 18:00:55 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* reload1.c (reload): Don't delete equiv insn if can throw.
* expr.c (emit_block_move): If X is readonly emit CLOBBER for it.
(clear_storage): Likewise, for OBJECT.

13
gcc/reload1.c
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@ -1071,9 +1071,16 @@ reload (first, global)
for (list = reg_equiv_init[i]; list; list = XEXP (list, 1))
{
rtx equiv_insn = XEXP (list, 0);
if (GET_CODE (equiv_insn) == NOTE)
continue;
if (reg_set_p (regno_reg_rtx[i], PATTERN (equiv_insn)))
/* If we already deleted the insn or if it may trap, we can't
delete it. The latter case shouldn't happen, but can
if an insn has a variable address, gets a REG_EH_REGION
note added to it, and then gets converted into an load
from a constant address. */
if (GET_CODE (equiv_insn) == NOTE
|| can_throw_internal (equiv_insn))
;
else if (reg_set_p (regno_reg_rtx[i], PATTERN (equiv_insn)))
delete_dead_insn (equiv_insn);
else
{