[llvm] [SystemZ][z/OS] Implement executePostLayoutBinding for GOFFObjectWriter (PR #67868)

[Kevin P. Neal via llvm-commits]

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@@ -18,10 +18,50 @@
 namespace llvm {
 
 class MCSymbolGOFF : public MCSymbol {
+  Align Alignment;
+  enum SymbolFlags : uint16_t {
+    SF_NoRent = 0x01, // Symbol is no-reentrant.
+    SF_Alias = 0x02,  // Symbol is alias.
+    SF_Hidden = 0x04, // Symbol is hidden, aka not exported.
+    SF_Weak = 0x08,   // Symbol is weak.
+  };
+
+  enum {
+    // Shift value for GOFF::ESDExecutable. 3 possible values. 2 bits.
+    GOFF_Executable_Shift = 6,
+    GOFF_Executable_Bitmask = 0x3,
+  };
+
 public:
   MCSymbolGOFF(const StringMapEntry<bool> *Name, bool IsTemporary)
       : MCSymbol(SymbolKindGOFF, Name, IsTemporary) {}
   static bool classof(const MCSymbol *S) { return S->isGOFF(); }
+
+  void setAlignment(Align Value) { Alignment = Value; }
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kpneal wrote:

How large is Align? I think it's only a few bytes in size. If it's about the size of, or smaller than, a pointer then there's no benefit to passing it by reference.

https://github.com/llvm/llvm-project/pull/67868