Handle modifications to the arguments and condition
in a single place.
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
tcg/optimize.c | 57 ++++++++++++++++++++++++--------------------------
1 file changed, 27 insertions(+), 30 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 73019b9996..9c04dba099 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -796,6 +796,23 @@ static bool swap_commutative2(TCGArg *p1, TCGArg *p2)
return false;
}
+static int do_constant_folding_cond1(OptContext *ctx, TCGArg dest,
+ TCGArg *p1, TCGArg *p2, TCGArg *pcond)
+{
+ TCGCond cond;
+ bool swap;
+ int r;
+
+ swap = swap_commutative(dest, p1, p2);
+ cond = *pcond;
+ if (swap) {
+ *pcond = cond = tcg_swap_cond(cond);
+ }
+
+ r = do_constant_folding_cond(ctx->type, *p1, *p2, cond);
+ return r;
+}
+
static void init_arguments(OptContext *ctx, TCGOp *op, int nb_args)
{
for (int i = 0; i < nb_args; i++) {
@@ -1193,14 +1210,8 @@ static bool fold_andc(OptContext *ctx, TCGOp *op)
static bool fold_brcond(OptContext *ctx, TCGOp *op)
{
- TCGCond cond = op->args[2];
- int i;
-
- if (swap_commutative(NO_DEST, &op->args[0], &op->args[1])) {
- op->args[2] = cond = tcg_swap_cond(cond);
- }
-
- i = do_constant_folding_cond(ctx->type, op->args[0], op->args[1], cond);
+ int i = do_constant_folding_cond1(ctx, NO_DEST, &op->args[0],
+ &op->args[1], &op->args[2]);
if (i == 0) {
tcg_op_remove(ctx->tcg, op);
return true;
@@ -1695,21 +1706,18 @@ static bool fold_mov(OptContext *ctx, TCGOp *op)
static bool fold_movcond(OptContext *ctx, TCGOp *op)
{
- TCGCond cond = op->args[5];
int i;
- if (swap_commutative(NO_DEST, &op->args[1], &op->args[2])) {
- op->args[5] = cond = tcg_swap_cond(cond);
- }
/*
* Canonicalize the "false" input reg to match the destination reg so
* that the tcg backend can implement a "move if true" operation.
*/
if (swap_commutative(op->args[0], &op->args[4], &op->args[3])) {
- op->args[5] = cond = tcg_invert_cond(cond);
+ op->args[5] = tcg_invert_cond(op->args[5]);
}
- i = do_constant_folding_cond(ctx->type, op->args[1], op->args[2], cond);
+ i = do_constant_folding_cond1(ctx, NO_DEST, &op->args[1],
+ &op->args[2], &op->args[5]);
if (i >= 0) {
return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[4 - i]);
}
@@ -1723,6 +1731,7 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op)
uint64_t tv = arg_info(op->args[3])->val;
uint64_t fv = arg_info(op->args[4])->val;
TCGOpcode opc, negopc = 0;
+ TCGCond cond = op->args[5];
switch (ctx->type) {
case TCG_TYPE_I32:
@@ -1950,14 +1959,8 @@ static bool fold_remainder(OptContext *ctx, TCGOp *op)
static bool fold_setcond(OptContext *ctx, TCGOp *op)
{
- TCGCond cond = op->args[3];
- int i;
-
- if (swap_commutative(op->args[0], &op->args[1], &op->args[2])) {
- op->args[3] = cond = tcg_swap_cond(cond);
- }
-
- i = do_constant_folding_cond(ctx->type, op->args[1], op->args[2], cond);
+ int i = do_constant_folding_cond1(ctx, op->args[0], &op->args[1],
+ &op->args[2], &op->args[3]);
if (i >= 0) {
return tcg_opt_gen_movi(ctx, op, op->args[0], i);
}
@@ -1969,14 +1972,8 @@ static bool fold_setcond(OptContext *ctx, TCGOp *op)
static bool fold_negsetcond(OptContext *ctx, TCGOp *op)
{
- TCGCond cond = op->args[3];
- int i;
-
- if (swap_commutative(op->args[0], &op->args[1], &op->args[2])) {
- op->args[3] = cond = tcg_swap_cond(cond);
- }
-
- i = do_constant_folding_cond(ctx->type, op->args[1], op->args[2], cond);
+ int i = do_constant_folding_cond1(ctx, op->args[0], &op->args[1],
+ &op->args[2], &op->args[3]);
if (i >= 0) {
return tcg_opt_gen_movi(ctx, op, op->args[0], -i);
}
--
2.34.1
