[llvm] [SandboxVec][BottomUpVec] Add cost estimation and tr-accept-or-revert pass (PR #124620)

[Jorge Gorbe Moya via llvm-commits]

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@@ -57,6 +57,24 @@ void Region::add(Instruction *I) {
   Scoreboard.add(I);
 }
 
+void Region::setAux(ArrayRef<Instruction *> Aux) {
+  this->Aux = SmallVector<Instruction *>(Aux);
+  auto &LLVMCtx = Ctx.LLVMCtx;
+  for (auto [Idx, I] : enumerate(Aux)) {
+    llvm::ConstantInt *IdxC =
+        llvm::ConstantInt::get(LLVMCtx, llvm::APInt(32, Idx, false));
+    cast<llvm::Instruction>(I->Val)->setMetadata(
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slackito wrote:

If an instruction is present multiple times in `Aux` the metadata will get replaced with the most recent one, right? Do you think it's worth adding an assert checking that there is no previous `AuxMDKind` metadata?

https://github.com/llvm/llvm-project/pull/124620