[PATCH] D65678: Register/MCRegister: Add conversion operators to avoid use of implicit convert to unsigned. NFC

[Daniel Sanders via Phabricator via llvm-commits]

dsanders created this revision.
dsanders added a reviewer: arsenm.
Herald added a subscriber: wdng.
Herald added a project: LLVM.

This has no functional effect but makes it more obvious which parts of the
compiler do not use Register/MCRegister when you mark the implicit conversion
deprecated.

Implicit conversions for comparisons accounted for ~20% (~3k of ~13k) of
the implicit conversions when I first measured it. I haven't maintained
those numbers as other patches have landed though so it may be out of date.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D65678

Files:
  llvm/include/llvm/CodeGen/Register.h
  llvm/include/llvm/MC/MCRegister.h


Index: llvm/include/llvm/MC/MCRegister.h
===================================================================
--- llvm/include/llvm/MC/MCRegister.h
+++ llvm/include/llvm/MC/MCRegister.h
@@ -63,6 +63,19 @@
   bool isValid() const {
     return Reg != 0;
   }
+
+  /// Comparisons between register objects
+  bool operator==(const MCRegister &Other) const { return Reg == Other.Reg; }
+  bool operator!=(const MCRegister &Other) const { return Reg != Other.Reg; }
+
+  /// Comparisons against register constants. E.g.
+  /// * R == AArch64::WZR
+  /// * R == 0
+  /// * R == VirtRegMap::NO_PHYS_REG
+  bool operator==(unsigned Other) const { return Reg == Other; }
+  bool operator!=(unsigned Other) const { return Reg != Other; }
+  bool operator==(int Other) const { return Reg == unsigned(Other); }
+  bool operator!=(int Other) const { return Reg != unsigned(Other); }
 };
 
 // Provide DenseMapInfo for MCRegister
Index: llvm/include/llvm/CodeGen/Register.h
===================================================================
--- llvm/include/llvm/CodeGen/Register.h
+++ llvm/include/llvm/CodeGen/Register.h
@@ -113,6 +113,19 @@
   bool isValid() const {
     return Reg != 0;
   }
+
+  /// Comparisons between register objects
+  bool operator==(const Register &Other) const { return Reg == Other.Reg; }
+  bool operator!=(const Register &Other) const { return Reg != Other.Reg; }
+
+  /// Comparisons against register constants. E.g.
+  /// * R == AArch64::WZR
+  /// * R == 0
+  /// * R == VirtRegMap::NO_PHYS_REG
+  bool operator==(unsigned Other) const { return Reg == Other; }
+  bool operator!=(unsigned Other) const { return Reg != Other; }
+  bool operator==(int Other) const { return Reg == unsigned(Other); }
+  bool operator!=(int Other) const { return Reg != unsigned(Other); }
 };
 
 // Provide DenseMapInfo for Register


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