perf(php): 优化PHP到C++转换性能

- 添加相同操作符编译时类型优化，对相同原始类型直接使用C++ ==
- 实现is_*函数编译时消除，当SSA缩小类型时直接返回true
- 添加count()函数字面量数组编译时计算
- 实现字符串字面量编译时操作优化，支持strtoupper、strtolower、trim等函数

src/Php/Optimizer/FuncCallOptimizer.php

@@ -193,6 +193,40 @@ trait FuncCallOptimizer
         if ($name === 'get_class') {
             return $this->genGetClass($expr);
         }
+        if (count($expr->args) === 1) {
+            $arg = $expr->args[0]->value;
+            $type = $this->detectTypeOfExpr($arg);
+            // is_* compile-time elimination when SSA-narrowed
+            if ($name === 'is_int' && $type === self::TYPE_INT) {
+                return 'true';
+            }
+            if ($name === 'is_float' && $type === self::TYPE_FLOAT) {
+                return 'true';
+            }
+            if ($name === 'is_bool' && $type === self::TYPE_BOOL) {
+                return 'true';
+            }
+            if ($name === 'is_null') {
+                return $this->parseIdentifier($arg) . '.isNull()';
+            }
+            // Compile-time count() on literal arrays
+            if ($name === 'count' && $arg instanceof Node\Expr\Array_) {
+                $itemCount = count($arg->items);
+                return $itemCount . $this->getPlatform()->getIntegerLiteralSuffix();
+            }
+            // Compile-time string operations on literals
+            if ($this->isScalarString($arg)) {
+                $val = $arg->value;
+                switch ($name) {
+                    case 'strtoupper':
+                        return $this->getLiteralString(strtoupper($val));
+                    case 'strtolower':
+                        return $this->getLiteralString(strtolower($val));
+                    case 'trim':
+                        return $this->getLiteralString(trim($val));
+                }
+            }
+        }
         return false;
     }
 

src/Php/Parser/BinaryOpTrait.php

@@ -230,9 +230,35 @@ trait BinaryOpTrait
         if ($right === 'nullptr') {
             return $left . '.isNull()';
         }
+        if ($optimized = $this->optimizeIdenticalOp($expr->left, $expr->right, $left, $right)) {
+            return $optimized;
+        }
         return 'php::same(' . $left . ', ' . $right . ')';
     }
 
+    /**
+     * Use compile-time type info to optimize === and !== .
+     * When both sides are the same narrowed primitive type, emit direct C++ == .
+     * When both are narrowed but different types, === is always false.
+     */
+    private function optimizeIdenticalOp(NodeAbstract $astLeft, NodeAbstract $astRight, string $cppLeft, string $cppRight): ?string
+    {
+        $primitiveTypes = [self::TYPE_INT, self::TYPE_FLOAT, self::TYPE_BOOL];
+        $leftType  = $this->detectTypeOfExpr($astLeft);
+        $rightType = $this->detectTypeOfExpr($astRight);
+
+        if ($leftType === null || $rightType === null) {
+            return null;
+        }
+        if (!in_array($leftType, $primitiveTypes, true) || !in_array($rightType, $primitiveTypes, true)) {
+            return null;
+        }
+        if ($leftType === $rightType) {
+            return $cppLeft . ' == ' . $cppRight;
+        }
+        return 'false';
+    }
+
     protected function parseBinaryOpLogicalAnd(Expr\BinaryOp\LogicalAnd|Expr\BinaryOp\BooleanAnd $expr): string
     {
         return $this->convertBoolExpr($this->parseBinaryOp($expr->left, $expr->right, '&&'));