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(distribute_notes): When output an insn to hold a REG_DEAD note,

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update basic_block_head if necessary.

From-SVN: r8658
This commit is contained in:
Richard Kenner 1994-12-16 06:44:16 -05:00
parent 6060a79633
commit e2cce0cf90
1 changed files with 10 additions and 3 deletions
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13
gcc/combine.c
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@ -10576,9 +10576,16 @@ distribute_notes (notes, from_insn, i3, i2, elim_i2, elim_i1)
put the death node there. This prevents problems with
call-state tracking in caller-save.c. */
if (REG_NOTE_KIND (note) == REG_DEAD && place == 0 && tem != 0)
place
= emit_insn_after (gen_rtx (USE, VOIDmode, XEXP (note, 0)),
tem);
{
place
= emit_insn_after (gen_rtx (USE, VOIDmode, XEXP (note, 0)),
tem);
/* If this insn was emitted between blocks, then update
basic_block_head of the current block to include it. */
if (basic_block_end[this_basic_block - 1] == tem)
basic_block_head[this_basic_block] = place;
}
}
/* If the register is set or already dead at PLACE, we needn't do