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-rw-r--r--compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp10
1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 6447a9362b3..0063f262c9b 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -688,6 +688,8 @@ struct LLVMRustSanitizerOptions {
   bool SanitizeKernelAddressRecover;
 };
 
+extern "C" void registerEnzyme(llvm::PassBuilder &PB);
+
 extern "C" LLVMRustResult LLVMRustOptimize(
     LLVMModuleRef ModuleRef, LLVMTargetMachineRef TMRef,
     LLVMRustPassBuilderOptLevel OptLevelRust, LLVMRustOptStage OptStage,
@@ -1010,6 +1012,14 @@ extern "C" LLVMRustResult LLVMRustOptimize(
     MPM.addPass(NameAnonGlobalPass());
   }
 
+  // now load "-enzyme" pass:
+  registerEnzyme(PB);
+  if (auto Err = PB.parsePassPipeline(MPM, "enzyme")) {
+    std::string ErrMsg = toString(std::move(Err));
+    LLVMRustSetLastError(ErrMsg.c_str());
+    return LLVMRustResult::Failure;
+  }
+
   // Upgrade all calls to old intrinsics first.
   for (Module::iterator I = TheModule->begin(), E = TheModule->end(); I != E;)
     UpgradeCallsToIntrinsic(&*I++); // must be post-increment, as we remove