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Fix CONV.num.int sinking.

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This commit is contained in:
Mike Pall 2012-11-06 16:57:50 +01:00
parent 69906d15de
commit ae1987d535
1 changed files with 12 additions and 3 deletions
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15
src/lj_asm.c
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@ -826,10 +826,19 @@ static void asm_snap_alloc1(ASMState *as, IRRef ref)
asm_snap_alloc1(as, (irs+1)->op2);
}
}
} else if (ir->o == IR_CONV && ir->op2 == IRCONV_NUM_INT) {
asm_snap_alloc1(as, ir->op1);
} else {
RegSet allow = (!LJ_SOFTFP && irt_isfp(ir->t)) ? RSET_FPR : RSET_GPR;
RegSet allow;
if (ir->o == IR_CONV && ir->op2 == IRCONV_NUM_INT) {
IRIns *irc;
for (irc = IR(as->curins); irc > ir; irc--)
if ((irc->op1 == ref || irc->op2 == ref) &&
!(irc->r == RID_SINK || irc->r == RID_SUNK))
goto nosink; /* Don't sink conversion if result is used. */
asm_snap_alloc1(as, ir->op1);
return;
}
nosink:
allow = (!LJ_SOFTFP && irt_isfp(ir->t)) ? RSET_FPR : RSET_GPR;
if ((as->freeset & allow) ||
(allow == RSET_FPR && asm_snap_canremat(as))) {
/* Get a weak register if we have a free one or can rematerialize. */