[llvm] [BOLT][AArch64] Transform cmpbr ~> cmp + br when inversion not possible (PR #185731)

[Paschalis Mpeis via llvm-commits]

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@@ -544,12 +546,22 @@ bool ReorderBasicBlocks::modifyFunctionLayout(BinaryFunction &BF,
 }
 
 Error FixupBranches::runOnFunctions(BinaryContext &BC) {
+  std::unique_ptr<BinaryFunctionCallGraph> CG;
+  std::unique_ptr<RegAnalysis> RA;
+  std::unique_ptr<DataflowInfoManager> DIM;
+
+  if (opts::LivenessAnalysis) {
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paschalis-mpeis wrote:

Thinking out loud whether we need to further restrict this to AArch64.
Other targets would have to specify this flag anyway..

Is the bulk of the work done here, at object creation, or later?

https://github.com/llvm/llvm-project/pull/185731