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tcg: Remove opcodes instead of noping them out

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With the linked list scheme we need not leave nops in the stream
that we need to process later.

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-03-30 16:51:54 -07:00
parent c45cb8bb89
commit 0c627cdca2
3 changed files with 32 additions and 11 deletions
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14
tcg/optimize.c
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@ -758,7 +758,7 @@ static void tcg_constant_folding(TCGContext *s)
break;
do_mov3:
if (temps_are_copies(args[0], args[1])) {
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
} else {
tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
}
@ -916,7 +916,7 @@ static void tcg_constant_folding(TCGContext *s)
if (affected == 0) {
assert(nb_oargs == 1);
if (temps_are_copies(args[0], args[1])) {
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
} else if (temps[args[1]].state != TCG_TEMP_CONST) {
tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
} else {
@ -948,7 +948,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(and):
if (temps_are_copies(args[1], args[2])) {
if (temps_are_copies(args[0], args[1])) {
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
} else {
tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
}
@ -979,7 +979,7 @@ static void tcg_constant_folding(TCGContext *s)
switch (opc) {
CASE_OP_32_64(mov):
if (temps_are_copies(args[0], args[1])) {
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
break;
}
if (temps[args[1]].state != TCG_TEMP_CONST) {
@ -1074,7 +1074,7 @@ static void tcg_constant_folding(TCGContext *s)
op->opc = INDEX_op_br;
args[0] = args[3];
} else {
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
}
break;
}
@ -1084,7 +1084,7 @@ static void tcg_constant_folding(TCGContext *s)
tmp = do_constant_folding_cond(opc, args[1], args[2], args[5]);
if (tmp != 2) {
if (temps_are_copies(args[0], args[4-tmp])) {
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
} else if (temps[args[4-tmp]].state == TCG_TEMP_CONST) {
tcg_opt_gen_movi(s, op, args, opc,
args[0], temps[args[4-tmp]].val);
@ -1177,7 +1177,7 @@ static void tcg_constant_folding(TCGContext *s)
args[0] = args[5];
} else {
do_brcond_false:
op->opc = INDEX_op_nop;
tcg_op_remove(s, op);
}
} else if ((args[4] == TCG_COND_LT || args[4] == TCG_COND_GE)
&& temps[args[2]].state == TCG_TEMP_CONST