[llvm] [RegAlloc] Account for use availability when applying rematerializable weight discount (PR #159180)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/include/llvm/CodeGen/CalcSpillWeights.h llvm/lib/CodeGen/CalcSpillWeights.cpp
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``````````diff
diff --git a/llvm/include/llvm/CodeGen/CalcSpillWeights.h b/llvm/include/llvm/CodeGen/CalcSpillWeights.h
index 5720cc22a..a1b31b564 100644
--- a/llvm/include/llvm/CodeGen/CalcSpillWeights.h
+++ b/llvm/include/llvm/CodeGen/CalcSpillWeights.h
@@ -78,8 +78,7 @@ class VirtRegMap;
                              const MachineRegisterInfo &MRI);
 
     /// Determine if all values in LI are rematerializable.
-    static bool isRematerializable(const LiveInterval &LI,
-                                   LiveIntervals &LIS,
+    static bool isRematerializable(const LiveInterval &LI, LiveIntervals &LIS,
                                    const VirtRegMap &VRM,
                                    const TargetInstrInfo &TII);
 

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https://github.com/llvm/llvm-project/pull/159180