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(emit_store_flag_force): New function.

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From-SVN: r12987
This commit is contained in:
Torbjorn Granlund 1996-10-21 22:18:56 +00:00
parent 17964a96fa
commit 04a8ee2ff6
1 changed files with 37 additions and 0 deletions
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37
gcc/expmed.c
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@ -4260,6 +4260,43 @@ emit_store_flag (target, code, op0, op1, mode, unsignedp, normalizep)
return tem;
}
/* Like emit_store_flag, but always succeeds. */
rtx
emit_store_flag_force (target, code, op0, op1, mode, unsignedp, normalizep)
rtx target;
enum rtx_code code;
rtx op0, op1;
enum machine_mode mode;
int unsignedp;
int normalizep;
{
rtx tem, label;
/* First see if emit_store_flag can do the job. */
tem = emit_store_flag (target, code, op0, op1, mode, unsignedp, normalizep);
if (tem != 0)
return tem;
if (normalizep == 0)
normalizep = 1;
/* If this failed, we have to do this with set/compare/jump/set code. */
if (GET_CODE (target) != REG
|| reg_mentioned_p (target, op0) || reg_mentioned_p (target, op1))
target = gen_reg_rtx (GET_MODE (target));
emit_move_insn (target, const0_rtx);
tem = compare_from_rtx (op0, op1, code, unsignedp, mode, NULL_RTX, 0);
if (GET_CODE (tem) == CONST_INT)
return tem;
label = gen_label_rtx ();
if (bcc_gen_fctn[(int) code] == 0)
abort ();
emit_jump_insn ((*bcc_gen_fctn[(int) code]) (label));
emit_move_insn (target, const1_rtx);
emit_label (label);