Compute a map from register names to registers, rather than scanning the list of registers every time we want to look up a register by name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163659 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/utils/TableGen/CodeGenRegisters.h b/utils/TableGen/CodeGenRegisters.h
index bd748ca62e..e411074156 100644
--- a/utils/TableGen/CodeGenRegisters.h
+++ b/utils/TableGen/CodeGenRegisters.h
@@ -440,6 +440,7 @@ namespace llvm {
 
     // Registers.
     std::vector<CodeGenRegister*> Registers;
+    StringMap<CodeGenRegister*> RegistersByName;
     DenseMap<Record*, CodeGenRegister*> Def2Reg;
     unsigned NumNativeRegUnits;
 
@@ -522,6 +523,9 @@ namespace llvm {
     }
 
     const std::vector<CodeGenRegister*> &getRegisters() { return Registers; }
+    const StringMap<CodeGenRegister*> &getRegistersByName() {
+      return RegistersByName;
+    }
 
     // Find a register from its Record def.
     CodeGenRegister *getReg(Record*);