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* config/c4x/c4x.c (c4x_rptb_insert): Make more robust. 

From-SVN: r35338
This commit is contained in:
Michael Hayes 2000-07-30 08:29:01 +00:00 committed by Michael Hayes
parent b61ba1ef51
commit b864825e85
2 changed files with 23 additions and 7 deletions
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6
gcc/ChangeLog
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@ -1,5 +1,9 @@
2000-07-30 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.c (c4x_rptb_insert): Make more robust.
2000-07-30 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.h (ASM_FORMAT_PRIVATE_NAME): Output $ in label.
2000-07-30 Michael Hayes <m.hayes@elec.canterbury.ac.nz>

24
gcc/config/c4x/c4x.c
View File

@ -2214,6 +2214,7 @@ c4x_rptb_insert (insn)
{
rtx end_label;
rtx start_label;
rtx new_start_label;
rtx count_reg;
/* If the count register has not been allocated to RC, say if
@ -2227,21 +2228,32 @@ c4x_rptb_insert (insn)
/* Extract the start label from the jump pattern (rptb_end). */
start_label = XEXP (XEXP (SET_SRC (XVECEXP (PATTERN (insn), 0, 0)), 1), 0);
/* We'll have to update the basic blocks. */
end_label = gen_label_rtx ();
LABEL_NUSES (end_label)++;
emit_label_after (end_label, insn);
new_start_label = gen_label_rtx ();
LABEL_NUSES (new_start_label)++;
for (; insn; insn = PREV_INSN (insn))
if (insn == start_label)
break;
{
if (insn == start_label)
break;
if (GET_CODE (insn) == JUMP_INSN &&
JUMP_LABEL (insn) == start_label)
redirect_jump (insn, new_start_label, 0);
}
if (! insn)
fatal_insn ("c4x_rptb_insert: Cannot find start label", start_label);
/* We'll have to update the basic blocks. */
emit_label_after (new_start_label, insn);
if (TARGET_RPTS && c4x_rptb_rpts_p (PREV_INSN (insn), 0))
emit_insn_before (gen_rpts_top (start_label, end_label), insn);
emit_insn_after (gen_rpts_top (new_start_label, end_label), insn);
else
emit_insn_before (gen_rptb_top (start_label, end_label), insn);
emit_insn_after (gen_rptb_top (new_start_label, end_label), insn);
if (LABEL_NUSES (start_label) == 0)
delete_insn (start_label);
}