[PATCH] D148654: Modify BoundsSan to improve debuggability

[Oskar Wirga via Phabricator via cfe-commits]

oskarwirga added inline comments.


================
Comment at: clang/lib/CodeGen/CGExpr.cpp:3576-3597
+    if (TrapBBs.size() <= CheckHandlerID)
+      TrapBBs.resize(CheckHandlerID + 1);
+    llvm::BasicBlock *&TrapBB = TrapBBs[CheckHandlerID];
+
+    if (!CGM.getCodeGenOpts().OptimizationLevel || !TrapBB ||
+        (CurCodeDecl && CurCodeDecl->hasAttr<OptimizeNoneAttr>())) {
+      TrapBB = createBasicBlock("trap");
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vitalybuka wrote:
> looks like a lot of code duplication
Let me refactor this 


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Comment at: clang/lib/CodeGen/CGExpr.cpp:3594
+        TrapCall->addFnAttr(A);
+      }
+      TrapCall->setDoesNotReturn();
----------------
vitalybuka wrote:
> wouldn't be you issues solved with
> TrapCall->setCannotMerge() here?
ubsantrap gets lowered to an instruction in MIR which then gets merged later. This was the only way I was able to create unique instruction per check. 


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D148654/new/

https://reviews.llvm.org/D148654