[X86] Make the X86FrameSortingComparator operator const. NFCI.

Fixes a cppcheck remark.

diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp
index e92384ce63857b21910f3798b3e9c0583700721e..05b4c94008aefa0bdfa73244478cc3d0b8ea37c4 100644 (file)
--- a/llvm/lib/Target/X86/X86FrameLowering.cpp
+++ b/llvm/lib/Target/X86/X86FrameLowering.cpp
@@ -3362,7 +3362,7 @@ struct X86FrameSortingObject {
 // at the end of our list.
 struct X86FrameSortingComparator {
   inline bool operator()(const X86FrameSortingObject &A,
-                         const X86FrameSortingObject &B) {
+                         const X86FrameSortingObject &B) const {
     uint64_t DensityAScaled, DensityBScaled;
 
     // For consistency in our comparison, all invalid objects are placed