[RegBankSelect] Use const_iterator instead of iterator for repairReg.

The repairing code has no reason to change the source or destination of
the registers.

llvm-svn: 272163

2 files changed, 6 insertions, 5 deletions

diff --git a/llvm/include/llvm/CodeGen/GlobalISel/RegBankSelect.h b/llvm/include/llvm/CodeGen/GlobalISel/RegBankSelect.h
index 29a89dca18f..b393744e67c 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/RegBankSelect.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/RegBankSelect.h
@@ -520,10 +520,11 @@ private:
   ///
   /// \note The caller is supposed to do the rewriting of op if need be.
   /// I.e., Reg = op ... => <NewRegs> = NewOp ...
-  void repairReg(
-      MachineOperand &MO, const RegisterBankInfo::ValueMapping &ValMapping,
-      RegBankSelect::RepairingPlacement &RepairPt,
-      const iterator_range<SmallVectorImpl<unsigned>::iterator> &NewVRegs);
+  void repairReg(MachineOperand &MO,
+                 const RegisterBankInfo::ValueMapping &ValMapping,
+                 RegBankSelect::RepairingPlacement &RepairPt,
+                 const iterator_range<SmallVectorImpl<unsigned>::const_iterator>
+                     &NewVRegs);
 
   /// Return the cost of the instruction needed to map \p MO to \p ValMapping.
   /// The cost is free of basic block frequencies.
diff --git a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
index 726ef268adb..daf1685b067 100644
--- a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
@@ -106,7 +106,7 @@ bool RegBankSelect::assignmentMatch(
 void RegBankSelect::repairReg(
     MachineOperand &MO, const RegisterBankInfo::ValueMapping &ValMapping,
     RegBankSelect::RepairingPlacement &RepairPt,
-    const iterator_range<SmallVectorImpl<unsigned>::iterator> &NewVRegs) {
+    const iterator_range<SmallVectorImpl<unsigned>::const_iterator> &NewVRegs) {
   assert(ValMapping.BreakDown.size() == 1 && "Not yet implemented");
   // Assume we are repairing a use and thus, the original reg will be
   // the source of the repairing.