tcg/optimize: Split out do_constant_folding_cond1

Handle modifications to the arguments and condition
in a single place.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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);
     }