[clang] [llvm] [mlir] [IR][ModRef] Introduce `errno` memory location (PR #120783)

[Nikita Popov via cfe-commits]

================
@@ -1915,11 +1915,31 @@ class CallBase : public Instruction {
   bool onlyAccessesInaccessibleMemory() const;
   void setOnlyAccessesInaccessibleMemory();
 
+  /// Determine if the function may only access errno memory.
+  bool onlyAccessesErrnoMemory() const;
+  void setOnlyAccessesErrnoMemory();
+
   /// Determine if the function may only access memory that is
   /// either inaccessible from the IR or pointed to by its arguments.
   bool onlyAccessesInaccessibleMemOrArgMem() const;
   void setOnlyAccessesInaccessibleMemOrArgMem();
 
+  /// Determine if the function may only access memory that is
+  ///  either inaccessible from the IR or errno memory.
+  bool onlyAccessesInaccessibleMemOrErrnoMem() const;
+  void setOnlyAccessesInaccessibleMemOrErrnoMem();
+
+  /// Determine if the function may only access memory that is
+  ///  either pointed to by its arguments or errno memory.
+  bool onlyAccessesArgMemOrErrnoMem() const;
+  void setOnlyAccessesArgMemOrErrnoMem();
+
+  /// Determine if the function may only access memory that is
+  ///  either inaccessible from the IR, pointed to by its arguments, or errno
+  ///  memory.
+  bool onlyAccessesInaccessibleMemOrArgMemOrErrnoMem() const;
+  void setOnlyAccessesInaccessibleMemOrArgMemOrErrnoMem();
----------------
nikic wrote:

Same.

https://github.com/llvm/llvm-project/pull/120783
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