fix: cache call expressions in render tag arguments

Ensure that they're called at most once per change, not once per access within the snippet
fixes #12187

Author: dummdidumm

.changeset/tricky-avocados-play.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: cache call expressions in render tag arguments

packages/svelte/src/compiler/phases/1-parse/state/tag.js

@@ -600,7 +600,8 @@ function special(parser) {
 			end: parser.index,
 			expression: expression,
 			metadata: {
-				dynamic: false
+				dynamic: false,
+				args_with_call_expression: new Set()
 			}
 		});
 	}

packages/svelte/src/compiler/phases/2-analyze/index.js

@@ -8,7 +8,8 @@ import {
 	extract_paths,
 	is_event_attribute,
 	is_text_attribute,
-	object
+	object,
+	unwrap_optional
 } from '../../utils/ast.js';
 import * as b from '../../utils/builders.js';
 import { MathMLElements, ReservedKeywords, Runes, SVGElements } from '../constants.js';
@@ -1297,6 +1298,30 @@ const common_visitors = {
 			expression.metadata.contains_call_expression = true;
 		}
 
+		if (context.state.ast_type === 'template') {
+			// Find out if this is a call expression inside a render tag argument
+			let i = -1;
+			let parent = context.path.at(i);
+
+			while (parent && parent.type !== 'RenderTag') {
+				i -= 1;
+				parent = context.path.at(i);
+			}
+
+			if (parent) {
+				const arg_path_idx = i + (parent.expression.type === 'CallExpression' ? 2 : 3);
+
+				if (arg_path_idx <= 0) {
+					const arg =
+						arg_path_idx === 0
+							? node
+							: /** @type {import('estree').Expression} */ (context.path.at(arg_path_idx));
+					const arg_idx = unwrap_optional(parent.expression).arguments.indexOf(arg);
+					parent.metadata.args_with_call_expression.add(arg_idx);
+				}
+			}
+		}
+
 		const callee = node.callee;
 		const rune = get_rune(node, context.state.scope);