tcg/optimize: Split out fold_movcond

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 9d1d045..110b3d1 100644 (file)
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -922,6 +922,34 @@ static bool fold_mb(OptContext *ctx, TCGOp *op)
     return true;
 }
 
+static bool fold_movcond(OptContext *ctx, TCGOp *op)
+{
+    TCGOpcode opc = op->opc;
+    TCGCond cond = op->args[5];
+    int i = do_constant_folding_cond(opc, op->args[1], op->args[2], cond);
+
+    if (i >= 0) {
+        return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[4 - i]);
+    }
+
+    if (arg_is_const(op->args[3]) && arg_is_const(op->args[4])) {
+        uint64_t tv = arg_info(op->args[3])->val;
+        uint64_t fv = arg_info(op->args[4])->val;
+
+        opc = (opc == INDEX_op_movcond_i32
+               ? INDEX_op_setcond_i32 : INDEX_op_setcond_i64);
+
+        if (tv == 1 && fv == 0) {
+            op->opc = opc;
+            op->args[3] = cond;
+        } else if (fv == 1 && tv == 0) {
+            op->opc = opc;
+            op->args[3] = tcg_invert_cond(cond);
+        }
+    }
+    return false;
+}
+
 static bool fold_mul(OptContext *ctx, TCGOp *op)
 {
     return fold_const2(ctx, op);
@@ -1715,31 +1743,6 @@ void tcg_optimize(TCGContext *s)
             }
             break;
 
-        CASE_OP_32_64(movcond):
-            i = do_constant_folding_cond(opc, op->args[1],
-                                         op->args[2], op->args[5]);
-            if (i >= 0) {
-                tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[4 - i]);
-                continue;
-            }
-            if (arg_is_const(op->args[3]) && arg_is_const(op->args[4])) {
-                uint64_t tv = arg_info(op->args[3])->val;
-                uint64_t fv = arg_info(op->args[4])->val;
-                TCGCond cond = op->args[5];
-
-                if (fv == 1 && tv == 0) {
-                    cond = tcg_invert_cond(cond);
-                } else if (!(tv == 1 && fv == 0)) {
-                    break;
-                }
-                op->args[3] = cond;
-                op->opc = opc = (opc == INDEX_op_movcond_i32
-                                 ? INDEX_op_setcond_i32
-                                 : INDEX_op_setcond_i64);
-            }
-            break;
-
-
         default:
             break;
 
@@ -1791,6 +1794,9 @@ void tcg_optimize(TCGContext *s)
         case INDEX_op_mb:
             done = fold_mb(&ctx, op);
             break;
+        CASE_OP_32_64(movcond):
+            done = fold_movcond(&ctx, op);
+            break;
         CASE_OP_32_64(mul):
             done = fold_mul(&ctx, op);
             break;