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Merge branch 'master' into v2.1

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This commit is contained in:
Mike Pall 2013-06-18 20:10:22 +02:00
commit edc7f35ab3
1 changed files with 12 additions and 3 deletions
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15
src/lj_opt_mem.c
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@ -396,13 +396,13 @@ static AliasRet aa_uref(IRIns *refa, IRIns *refb)
TRef LJ_FASTCALL lj_opt_fwd_uload(jit_State *J) TRef LJ_FASTCALL lj_opt_fwd_uload(jit_State *J)
{ {
IRRef uref = fins->op1; IRRef uref = fins->op1;
IRRef lim = uref; /* Search limit. */ IRRef lim = REF_BASE; /* Search limit. */
IRIns *xr = IR(uref); IRIns *xr = IR(uref);
IRRef ref; IRRef ref;
/* Search for conflicting stores. */ /* Search for conflicting stores. */
ref = J->chain[IR_USTORE]; ref = J->chain[IR_USTORE];
while (ref > uref) { while (ref > lim) {
IRIns *store = IR(ref); IRIns *store = IR(ref);
switch (aa_uref(xr, IR(store->op1))) { switch (aa_uref(xr, IR(store->op1))) {
case ALIAS_NO: break; /* Continue searching. */ case ALIAS_NO: break; /* Continue searching. */
@ -414,7 +414,16 @@ TRef LJ_FASTCALL lj_opt_fwd_uload(jit_State *J)
cselim: cselim:
/* Try to find a matching load. Below the conflicting store, if any. */ /* Try to find a matching load. Below the conflicting store, if any. */
return lj_opt_cselim(J, lim);
ref = J->chain[IR_ULOAD];
while (ref > lim) {
IRIns *ir = IR(ref);
if (ir->op1 == uref ||
(IR(ir->op1)->op12 == IR(uref)->op12 && IR(ir->op1)->o == IR(uref)->o))
return ref; /* Match for identical or equal UREFx (non-CSEable UREFO). */
ref = ir->prev;
}
return lj_ir_emit(J);
} }
/* USTORE elimination. */ /* USTORE elimination. */