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riscv-gcc-1
Commit 650a59ef by J"orn Rennecke Committed by Kaz Kojima
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re PR target/28764 (libjava build failure on sh4) 

	PR target/28764
	* mode-switching.c (optimize_mode_switching): Make the destination
	block of an abnormal edge have no anticipatable mode.  Don't
	insert mode switching code at the end of the source block of
	an abnormal edge.


Co-Authored-By: Kaz Kojima <kkojima@gcc.gnu.org>

From-SVN: r116703
parent ec1ee655
Showing with 19 additions and 33 deletions
gcc/ChangeLog
2006-09-05 J"orn Rennecke <joern.rennecke@st.com>
Kaz Kojima <kkojima@gcc.gnu.org>
PR target/28764
* mode-switching.c (optimize_mode_switching): Make the destination
block of an abnormal edge have no anticipatable mode. Don't
insert mode switching code at the end of the source block of
an abnormal edge.
2006-09-05 Paolo Bonzini <bonzini@gnu.org>
PR rtl-optimization/26847
......
gcc/mode-switching.c
......@@ -465,7 +465,11 @@ optimize_mode_switching (void)
if (e->flags & EDGE_COMPLEX)
break;
if (e)
RESET_BIT (transp[bb->index], j);
{
ptr = new_seginfo (no_mode, BB_HEAD (bb), bb->index, live_now);
add_seginfo (info + bb->index, ptr);
RESET_BIT (transp[bb->index], j);
}
}
for (insn = BB_HEAD (bb);
......@@ -608,38 +612,11 @@ optimize_mode_switching (void)
if (mode_set == NULL_RTX)
continue;
/* If this is an abnormal edge, we'll insert at the end
of the previous block. */
if (eg->flags & EDGE_ABNORMAL)
{
emited = true;
if (JUMP_P (BB_END (src_bb)))
emit_insn_before (mode_set, BB_END (src_bb));
else
{
/* It doesn't make sense to switch to normal
mode after a CALL_INSN. The cases in which a
CALL_INSN may have an abnormal edge are
sibcalls and EH edges. In the case of
sibcalls, the dest basic-block is the
EXIT_BLOCK, that runs in normal mode; it is
assumed that a sibcall insn requires normal
mode itself, so no mode switch would be
required after the call (it wouldn't make
sense, anyway). In the case of EH edges, EH
entry points also start in normal mode, so a
similar reasoning applies. */
gcc_assert (NONJUMP_INSN_P (BB_END (src_bb)));
emit_insn_after (mode_set, BB_END (src_bb));
}
bb_info[j][src_bb->index].computing = mode;
RESET_BIT (transp[src_bb->index], j);
}
else
{
need_commit = 1;
insert_insn_on_edge (mode_set, eg);
}
/* We should not get an abnormal edge here. */
gcc_assert (! (eg->flags & EDGE_ABNORMAL));
need_commit = 1;
insert_insn_on_edge (mode_set, eg);
}
FOR_EACH_BB_REVERSE (bb)
......
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