Allow accessing parameters in a naked function, just disallow return, this fixes #1955.

test/test_suite/asm/naked_call_with_instructions.c3t

@@ -0,0 +1,28 @@
+// #target: macos-x64
+module test;
+import std;
+fn void main()
+{
+	char[8] foo = {255, 0, 0, 0, 0, 0, 0, 0};
+	io::printn(to_ulong(&foo));
+}
+
+fn ulong to_ulong(char[8]* buf) @naked @noinline
+{
+	asm
+	{
+		movq $rax, [buf];
+		ret;
+	}
+	unreachable();
+}
+
+/* #expect: test.ll
+
+define i64 @test.to_ulong(ptr %0) #1 {
+entry:
+  call void asm sideeffect alignstack "movq ($0), %rax\0Aret \0A", "r,~{rax},~{flags},~{dirflag},~{fspr}"(ptr %0)
+  unreachable
+}
+
+attributes #1 = { naked noinline nounwind uwtable "no-trapping-math"="true" "stack-protector-buffer-size"="8" }

test/test_suite/lambda/lambda_attributes.c3t

@@ -3,14 +3,15 @@ module test;
 
 alias IntFn = fn int();
 IntFn lambda @export = fn () => 1;
-IntFn lambda_naked @export = fn () @naked => 2;
+IntFn lambda_naked @export = fn () @naked { asm("ret"); };
 
 /* #expect: test.ll
 
 ; Function Attrs: naked nounwind uwtable
 define internal i32 @"test.$global$lambda2"() #0 {
 entry:
-  ret i32 2
+  call void asm sideeffect alignstack "ret", "~{dirflag},~{fpsr},~{flags}"()
+  unreachable
 }
 
 ; Function Attrs: nounwind uwtable