[lld][NFC] Factor out isCodeSection helper. (llvm#69193)

Author: cjacek

lld/COFF/Writer.cpp

@@ -1403,11 +1403,7 @@ void Writer::assignAddresses() {
 
     // If /FUNCTIONPADMIN is used, functions are padded in order to create a
     // hotpatchable image.
-    const bool isCodeSection =
-        (sec->header.Characteristics & IMAGE_SCN_CNT_CODE) &&
-        (sec->header.Characteristics & IMAGE_SCN_MEM_READ) &&
-        (sec->header.Characteristics & IMAGE_SCN_MEM_EXECUTE);
-    uint32_t padding = isCodeSection ? config->functionPadMin : 0;
+    uint32_t padding = sec->isCodeSection() ? config->functionPadMin : 0;
 
     for (Chunk *c : sec->chunks) {
       if (padding && c->isHotPatchable())

lld/COFF/Writer.h

@@ -64,6 +64,12 @@ class OutputSection {
   // Used only when the name is longer than 8 bytes.
   void setStringTableOff(uint32_t v) { stringTableOff = v; }
 
+  bool isCodeSection() const {
+    return (header.Characteristics & llvm::COFF::IMAGE_SCN_CNT_CODE) &&
+           (header.Characteristics & llvm::COFF::IMAGE_SCN_MEM_READ) &&
+           (header.Characteristics & llvm::COFF::IMAGE_SCN_MEM_EXECUTE);
+  }
+
   // N.B. The section index is one based.
   uint32_t sectionIndex = 0;