[llvm] [RegisterCoalescer] Skip the pattern that can't resolve (PR #71024)

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``````````bash
git-clang-format --diff 749083b91f31f370cf64831d3e7e6215b6d51442 95dbe42be96903dcaeedb5b9878339ba29008f78 -- llvm/lib/CodeGen/RegisterCoalescer.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/RegisterCoalescer.cpp b/llvm/lib/CodeGen/RegisterCoalescer.cpp
index c962668d314c..8593606882b2 100644
--- a/llvm/lib/CodeGen/RegisterCoalescer.cpp
+++ b/llvm/lib/CodeGen/RegisterCoalescer.cpp
@@ -3483,17 +3483,17 @@ void JoinVals::eraseInstrs(SmallPtrSetImpl<MachineInstr*> &ErasedInstrs,
   }
 }
 
-// If the overlapping segment all be mark as CR_Replace resolution, 
+// If the overlapping segment all be mark as CR_Replace resolution,
 // but can't be resolved resolveConflicts/pruneValues function.
-// 
-// This function target this particular pattern and make joinVReg fail. 
 //
-// For example: 
-//   LHS: %12 [32r,80r:0)[96r,240r:1) 0 at 32r 1 at 96r 
+// This function target this particular pattern and make joinVReg fail.
+//
+// For example:
+//   LHS: %12 [32r,80r:0)[96r,240r:1) 0 at 32r 1 at 96r
 //   RHS: %17 [240e,288r:1) 0 at 48r 1 at 240e
-// [96r,240r:2) and [240e,288r:1) both be mark as CR_Replace, 
+// [96r,240r:2) and [240e,288r:1) both be mark as CR_Replace,
 // but does't be resolved after pruneValues.
-// 
+//
 bool JoinVals::canCRReplaceBeResolved(JoinVals &Other) {
   for (auto Seg : LR.segments) {
     for (auto OtherSeg : Other.LR.segments) {
@@ -3635,7 +3635,8 @@ bool RegisterCoalescer::joinVirtRegs(CoalescerPair &CP) {
     return false;
 
   // Some CR_Replace can't be solved by pruneValues. Early exit here.
-  if (!LHSVals.canCRReplaceBeResolved(RHSVals) || !RHSVals.canCRReplaceBeResolved(LHSVals))
+  if (!LHSVals.canCRReplaceBeResolved(RHSVals) ||
+      !RHSVals.canCRReplaceBeResolved(LHSVals))
     return false;
 
   // All clear, the live ranges can be merged.

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https://github.com/llvm/llvm-project/pull/71024