tcg/optimize: Do swap_commutative2 in do_constant_folding_cond2
Mirror the new do_constant_folding_cond1 by doing all argument and condition adjustment within one helper. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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tcg/optimize.c
107
tcg/optimize.c
@ -713,43 +713,6 @@ static int do_constant_folding_cond(TCGType type, TCGArg x,
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return -1;
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}
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/*
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* Return -1 if the condition can't be simplified,
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* and the result of the condition (0 or 1) if it can.
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*/
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static int do_constant_folding_cond2(TCGArg *p1, TCGArg *p2, TCGCond c)
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{
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TCGArg al = p1[0], ah = p1[1];
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TCGArg bl = p2[0], bh = p2[1];
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if (arg_is_const(bl) && arg_is_const(bh)) {
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tcg_target_ulong blv = arg_info(bl)->val;
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tcg_target_ulong bhv = arg_info(bh)->val;
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uint64_t b = deposit64(blv, 32, 32, bhv);
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if (arg_is_const(al) && arg_is_const(ah)) {
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tcg_target_ulong alv = arg_info(al)->val;
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tcg_target_ulong ahv = arg_info(ah)->val;
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uint64_t a = deposit64(alv, 32, 32, ahv);
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return do_constant_folding_cond_64(a, b, c);
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}
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if (b == 0) {
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switch (c) {
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case TCG_COND_LTU:
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return 0;
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case TCG_COND_GEU:
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return 1;
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default:
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break;
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}
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}
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}
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if (args_are_copies(al, bl) && args_are_copies(ah, bh)) {
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return do_constant_folding_cond_eq(c);
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}
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return -1;
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}
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/**
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* swap_commutative:
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* @dest: TCGArg of the destination argument, or NO_DEST.
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@ -796,6 +759,10 @@ static bool swap_commutative2(TCGArg *p1, TCGArg *p2)
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return false;
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}
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/*
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* Return -1 if the condition can't be simplified,
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* and the result of the condition (0 or 1) if it can.
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*/
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static int do_constant_folding_cond1(OptContext *ctx, TCGArg dest,
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TCGArg *p1, TCGArg *p2, TCGArg *pcond)
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{
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@ -813,6 +780,51 @@ static int do_constant_folding_cond1(OptContext *ctx, TCGArg dest,
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return r;
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}
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static int do_constant_folding_cond2(OptContext *ctx, TCGArg *args)
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{
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TCGArg al, ah, bl, bh;
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TCGCond c;
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bool swap;
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swap = swap_commutative2(args, args + 2);
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c = args[4];
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if (swap) {
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args[4] = c = tcg_swap_cond(c);
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}
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al = args[0];
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ah = args[1];
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bl = args[2];
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bh = args[3];
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if (arg_is_const(bl) && arg_is_const(bh)) {
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tcg_target_ulong blv = arg_info(bl)->val;
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tcg_target_ulong bhv = arg_info(bh)->val;
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uint64_t b = deposit64(blv, 32, 32, bhv);
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if (arg_is_const(al) && arg_is_const(ah)) {
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tcg_target_ulong alv = arg_info(al)->val;
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tcg_target_ulong ahv = arg_info(ah)->val;
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uint64_t a = deposit64(alv, 32, 32, ahv);
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return do_constant_folding_cond_64(a, b, c);
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}
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if (b == 0) {
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switch (c) {
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case TCG_COND_LTU:
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return 0;
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case TCG_COND_GEU:
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return 1;
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default:
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break;
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}
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}
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}
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if (args_are_copies(al, bl) && args_are_copies(ah, bh)) {
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return do_constant_folding_cond_eq(c);
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}
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return -1;
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}
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static void init_arguments(OptContext *ctx, TCGOp *op, int nb_args)
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{
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for (int i = 0; i < nb_args; i++) {
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@ -1225,15 +1237,13 @@ static bool fold_brcond(OptContext *ctx, TCGOp *op)
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static bool fold_brcond2(OptContext *ctx, TCGOp *op)
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{
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TCGCond cond = op->args[4];
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TCGArg label = op->args[5];
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TCGCond cond;
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TCGArg label;
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int i, inv = 0;
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if (swap_commutative2(&op->args[0], &op->args[2])) {
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op->args[4] = cond = tcg_swap_cond(cond);
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}
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i = do_constant_folding_cond2(&op->args[0], &op->args[2], cond);
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i = do_constant_folding_cond2(ctx, &op->args[0]);
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cond = op->args[4];
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label = op->args[5];
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if (i >= 0) {
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goto do_brcond_const;
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}
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@ -1986,14 +1996,11 @@ static bool fold_negsetcond(OptContext *ctx, TCGOp *op)
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static bool fold_setcond2(OptContext *ctx, TCGOp *op)
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{
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TCGCond cond = op->args[5];
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TCGCond cond;
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int i, inv = 0;
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if (swap_commutative2(&op->args[1], &op->args[3])) {
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op->args[5] = cond = tcg_swap_cond(cond);
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}
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i = do_constant_folding_cond2(&op->args[1], &op->args[3], cond);
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i = do_constant_folding_cond2(ctx, &op->args[1]);
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cond = op->args[5];
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if (i >= 0) {
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goto do_setcond_const;
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}
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