InlineAssembly: Extracting tests for if statement

test/libyul/yulSyntaxTests/if_statement.yul

@@ -0,0 +1,8 @@
+{
+    { if 42 {} }
+    { if 42 { let x := 3 } }
+    { function f() -> x {} if f() { pop(f()) } }
+    { let x := 0 if eq(calldatasize(), 0) { x := 1 } mstore(0, x) }
+}
+// ====
+// dialect: evm

test/libyul/yulSyntaxTests/if_statement_invalid_1.yul

@@ -0,0 +1,5 @@
+{
+    if mload {}
+}
+// ----
+// ParserError 2314: (15-16): Expected '(' but got '{'

test/libyul/yulSyntaxTests/if_statement_invalid_2.yul

@@ -0,0 +1,7 @@
+{
+	if mstore(1, 1) {}
+}
+// ====
+// dialect: evm
+// ----
+// TypeError 3950: (6-18): Expected expression to evaluate to one value, but got 0 values instead.

test/libyul/yulSyntaxTests/if_statement_invalid_3.yul

@@ -0,0 +1,7 @@
+{
+    if 32 let x := 3
+}
+// ====
+// dialect: yul
+// ----
+// ParserError 2314: (12-15): Expected '{' but got reserved keyword 'let'

test/libyul/yulSyntaxTests/if_statement_invalid_4.yul

@@ -0,0 +1,5 @@
+{
+    if calldatasize {}
+}
+// ----
+// ParserError 2314: (22-23): Expected '(' but got '{'

test/libyul/yulSyntaxTests/if_statement_scope_1.yul

@@ -0,0 +1,6 @@
+{
+	let x := 2
+	if 42 { x := 3 }
+}
+// ====
+// dialect: evm

test/libyul/yulSyntaxTests/if_statement_scope_2.yul

@@ -0,0 +1,8 @@
+{
+	if 32 { let x := 3 }
+	x := 2
+}
+// ====
+// dialect: evm
+// ----
+// DeclarationError 4634: (25-26): Variable not found or variable not lvalue.