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alpha.c (alpha_split_conditional_move): Call copy_rtx as needed to avoid shared structure.

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* config/alpha/alpha.c (alpha_split_conditional_move): Call copy_rtx
        as needed to avoid shared structure.

From-SVN: r48667
This commit is contained in:
Richard Henderson 2002-01-08 15:42:56 -08:00 • committed by Richard Henderson
parent 18cf8ddada
commit a537627667
2 changed files with 17 additions and 7 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-01-08 Richard Henderson <rth@redhat.com>
* config/alpha/alpha.c (alpha_split_conditional_move): Call copy_rtx
as needed to avoid shared structure.
2002-01-08 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.c (get_shift_alg): Fix 15-bit LSHIFTRT on

19
gcc/config/alpha/alpha.c
View file

@ -3166,6 +3166,9 @@ alpha_split_conditional_move (code, dest, cond, t_rtx, f_rtx)
else
subtarget = target;
}
/* Below, we must be careful to use copy_rtx on target and subtarget
in intermediate insns, as they may be a subreg rtx, which may not
be shared. */
if (f == 0 && exact_log2 (diff) > 0
/* On EV6, we've got enough shifters to make non-arithmatic shifts
@ -3174,33 +3177,35 @@ alpha_split_conditional_move (code, dest, cond, t_rtx, f_rtx)
&& (diff <= 8 || alpha_cpu == PROCESSOR_EV6))
{
tmp = gen_rtx_fmt_ee (code, DImode, cond, const0_rtx);
emit_insn (gen_rtx_SET (VOIDmode, subtarget, tmp));
emit_insn (gen_rtx_SET (VOIDmode, copy_rtx (subtarget), tmp));
tmp = gen_rtx_ASHIFT (DImode, subtarget, GEN_INT (exact_log2 (t)));
tmp = gen_rtx_ASHIFT (DImode, copy_rtx (subtarget),
GEN_INT (exact_log2 (t)));
emit_insn (gen_rtx_SET (VOIDmode, target, tmp));
}
else if (f == 0 && t == -1)
{
tmp = gen_rtx_fmt_ee (code, DImode, cond, const0_rtx);
emit_insn (gen_rtx_SET (VOIDmode, subtarget, tmp));
emit_insn (gen_rtx_SET (VOIDmode, copy_rtx (subtarget), tmp));
emit_insn (gen_negdi2 (target, subtarget));
emit_insn (gen_negdi2 (target, copy_rtx (subtarget)));
}
else if (diff == 1 || diff == 4 || diff == 8)
{
rtx add_op;
tmp = gen_rtx_fmt_ee (code, DImode, cond, const0_rtx);
emit_insn (gen_rtx_SET (VOIDmode, subtarget, tmp));
emit_insn (gen_rtx_SET (VOIDmode, copy_rtx (subtarget), tmp));
if (diff == 1)
emit_insn (gen_adddi3 (target, subtarget, GEN_INT (f)));
emit_insn (gen_adddi3 (target, copy_rtx (subtarget), GEN_INT (f)));
else
{
add_op = GEN_INT (f);
if (sext_add_operand (add_op, mode))
{
tmp = gen_rtx_MULT (DImode, subtarget, GEN_INT (diff));
tmp = gen_rtx_MULT (DImode, copy_rtx (subtarget),
GEN_INT (diff));
tmp = gen_rtx_PLUS (DImode, tmp, add_op);
emit_insn (gen_rtx_SET (VOIDmode, target, tmp));
}