[llvm] 1fdb038 - CodeGen: Add constexpr to Register constructors

[Matt Arsenault via llvm-commits]

Author: Matt Arsenault
Date: 2020-03-12T19:10:59-04:00
New Revision: 1fdb03808b016a7334f99230d312ff8b5ee45b3a

URL: https://github.com/llvm/llvm-project/commit/1fdb03808b016a7334f99230d312ff8b5ee45b3a
DIFF: https://github.com/llvm/llvm-project/commit/1fdb03808b016a7334f99230d312ff8b5ee45b3a.diff

LOG: CodeGen: Add constexpr to Register constructors

Added: 
    

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

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/CodeGen/Register.h b/llvm/include/llvm/CodeGen/Register.h
index aa5173684e24..a933a39185f7 100644
--- a/llvm/include/llvm/CodeGen/Register.h
+++ b/llvm/include/llvm/CodeGen/Register.h
@@ -20,8 +20,8 @@ class Register {
   unsigned Reg;
 
 public:
-  Register(unsigned Val = 0): Reg(Val) {}
-  Register(MCRegister Val): Reg(Val) {}
+  constexpr Register(unsigned Val = 0): Reg(Val) {}
+  constexpr Register(MCRegister Val): Reg(Val) {}
 
   // Register numbers can represent physical registers, virtual registers, and
   // sometimes stack slots. The unsigned values are divided into these ranges:
@@ -102,7 +102,7 @@ class Register {
     return virtReg2Index(Reg);
   }
 
-  operator unsigned() const {
+  constexpr operator unsigned() const {
     return Reg;
   }
 

diff  --git a/llvm/include/llvm/MC/MCRegister.h b/llvm/include/llvm/MC/MCRegister.h
index 8372947a4ba1..79a8dcdadb41 100644
--- a/llvm/include/llvm/MC/MCRegister.h
+++ b/llvm/include/llvm/MC/MCRegister.h
@@ -23,7 +23,7 @@ class MCRegister {
   unsigned Reg;
 
 public:
-  MCRegister(unsigned Val = 0): Reg(Val) {}
+  constexpr MCRegister(unsigned Val = 0): Reg(Val) {}
 
   // Register numbers can represent physical registers, virtual registers, and
   // sometimes stack slots. The unsigned values are divided into these ranges:
@@ -60,7 +60,7 @@ class MCRegister {
     return isPhysicalRegister(Reg);
   }
 
-  operator unsigned() const {
+  constexpr operator unsigned() const {
     return Reg;
   }