a few tiny cleanups (#5712)

exposes emitLazily (for nlvm) and simplifies some conditionals

compiler/ccgutils.nim

@@ -11,7 +11,7 @@
 
 import
   ast, astalgo, ropes, hashes, strutils, types, msgs, wordrecg,
-  platform, trees
+  platform, trees, options
 
 proc getPragmaStmt*(n: PNode, w: TSpecialWord): PNode =
   case n.kind
@@ -211,20 +211,8 @@ proc mangle*(name: string): string =
   if requiresUnderscore:
     result.add "_"
 
-proc makeLLVMString*(s: string): Rope =
-  const MaxLineLength = 64
-  result = nil
-  var res = "c\""
-  for i in countup(0, len(s) - 1):
-    if (i + 1) mod MaxLineLength == 0:
-      add(result, rope(res))
-      setLen(res, 0)
-    case s[i]
-    of '\0'..'\x1F', '\x7F'..'\xFF', '\"', '\\':
-      add(res, '\\')
-      add(res, toHex(ord(s[i]), 2))
-    else: add(res, s[i])
-  add(res, "\\00\"")
-  add(result, rope(res))
+proc emitLazily*(s: PSym): bool {.inline.} =
+  result = optDeadCodeElim in gGlobalOptions or
+           sfDeadCodeElim in getModule(s).flags
 
 initTypeTables()