[llvm-exegesis] Cleaner design without mutable data.

Summary: Previous design was relying on the 'mutate' keyword and was quite confusing. This version separate mutable from immutable data and makes it clearer what changes and what doesn't.

Reviewers: courbet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D48020

llvm-svn: 334596

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/RegisterAliasing.cpp b/llvm/tools/llvm-exegesis/lib/RegisterAliasing.cpp
index fb5547bb603..039f78db985 100644
--- a/llvm/tools/llvm-exegesis/lib/RegisterAliasing.cpp
+++ b/llvm/tools/llvm-exegesis/lib/RegisterAliasing.cpp
@@ -64,7 +64,7 @@ RegisterAliasingTrackerCache::RegisterAliasingTrackerCache(
       EmptyRegisters(RegInfo.getNumRegs()) {}
 
 const RegisterAliasingTracker &
-RegisterAliasingTrackerCache::getRegister(llvm::MCPhysReg PhysReg) {
+RegisterAliasingTrackerCache::getRegister(llvm::MCPhysReg PhysReg) const {
   auto &Found = Registers[PhysReg];
   if (!Found)
     Found.reset(new RegisterAliasingTracker(RegInfo, PhysReg));
@@ -72,7 +72,7 @@ RegisterAliasingTrackerCache::getRegister(llvm::MCPhysReg PhysReg) {
 }
 
 const RegisterAliasingTracker &
-RegisterAliasingTrackerCache::getRegisterClass(unsigned RegClassIndex) {
+RegisterAliasingTrackerCache::getRegisterClass(unsigned RegClassIndex) const {
   auto &Found = RegisterClasses[RegClassIndex];
   const auto &RegClass = RegInfo.getRegClass(RegClassIndex);
   if (!Found)