[PATCH] D154106: [NVPTX] added a hidden option to control NVPTXLowerUnreachable pass.

[Artem Belevich via Phabricator via llvm-commits]

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We've ran into an issue where the pass breaks a handful of our internal tests
and need a way to temporarily disable the pass while we're investigating.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D154106

Files:
  llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp


Index: llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
===================================================================
--- llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
+++ llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
@@ -63,6 +63,12 @@
         "Use 32-bit pointers for accessing const/local/shared address spaces."),
     cl::init(false), cl::Hidden);
 
+static cl::opt<bool> ExitOnUnreachable(
+    "nvptx-exit-on-unreachable",
+    cl::desc(
+        "Lower 'unreachable' as 'exit' instruction."),
+    cl::init(true), cl::Hidden);
+
 namespace llvm {
 
 void initializeGenericToNVVMLegacyPassPass(PassRegistry &);
@@ -403,7 +409,8 @@
     addPass(createSROAPass());
   }
 
-  addPass(createNVPTXLowerUnreachablePass());
+  if (ExitOnUnreachable)
+    addPass(createNVPTXLowerUnreachablePass());
 }
 
 bool NVPTXPassConfig::addInstSelector() {


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