Reland [mlir][ExecutionEngine] Add support for global constructors and destructors #78070

[fabianmcg]

This patch add support for executing global constructors and destructors in the ExecutionEngine.

[llvmbot]

@llvm/pr-subscribers-mlir

@llvm/pr-subscribers-mlir-execution-engine

Author: Fabian Mora (fabianmcg)

Changes

This patch add support for executing global constructors and destructors in the ExecutionEngine.

---

Full diff: https://github.com/llvm/llvm-project/pull/78170.diff

2 Files Affected:

• (modified) mlir/lib/ExecutionEngine/ExecutionEngine.cpp (+11)
• (added) mlir/test/mlir-cpu-runner/global-constructors.mlir (+33)

diff --git a/mlir/lib/ExecutionEngine/ExecutionEngine.cpp b/mlir/lib/ExecutionEngine/ExecutionEngine.cpp
index 267ec236d3fd59..19917ea4ff1dab 100644
--- a/mlir/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/mlir/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -219,6 +219,11 @@ ExecutionEngine::ExecutionEngine(bool enableObjectDump,
 }
 
 ExecutionEngine::~ExecutionEngine() {
+  // Execute the global destructors from the module being processed.
+  // TODO: Allow JIT deinitialize for AArch64. Currently there's a bug causing a
+  // crash for AArch64 see related issue #71963.
+  if (jit && !jit->getTargetTriple().isAArch64())
+    llvm::consumeError(jit->deinitialize(jit->getMainJITDylib()));
   // Run all dynamic library destroy callbacks to prepare for the shutdown.
   for (LibraryDestroyFn destroy : destroyFns)
     destroy();
@@ -396,6 +401,12 @@ ExecutionEngine::create(Operation *m, const ExecutionEngineOptions &options,
   };
   engine->registerSymbols(runtimeSymbolMap);
 
+  // Execute the global constructors from the module being processed.
+  // TODO: Allow JIT initialize for AArch64. Currently there's a bug causing a
+  // crash for AArch64 see related issue #71963.
+  if (!engine->jit->getTargetTriple().isAArch64())
+    cantFail(engine->jit->initialize(engine->jit->getMainJITDylib()));
+
   return std::move(engine);
 }
 
diff --git a/mlir/test/mlir-cpu-runner/global-constructors.mlir b/mlir/test/mlir-cpu-runner/global-constructors.mlir
new file mode 100644
index 00000000000000..fe1fe06574648e
--- /dev/null
+++ b/mlir/test/mlir-cpu-runner/global-constructors.mlir
@@ -0,0 +1,33 @@
+// UNSUPPORTED: target=aarch64{{.*}}
+// RUN: mlir-cpu-runner %s -e entry -entry-point-result=void  \
+// RUN: -shared-libs=%mlir_c_runner_utils | \
+// RUN: FileCheck %s
+
+// Test that the `ctor` executes before `entry` and that `dtor` executes last.
+module {
+  llvm.func @printNewline()
+  llvm.func @printI64(i64)
+  llvm.mlir.global_ctors {ctors = [@ctor], priorities = [0 : i32]}
+  llvm.mlir.global_dtors {dtors = [@dtor], priorities = [0 : i32]}
+  llvm.func @ctor() {
+    %0 = llvm.mlir.constant(1 : i64) : i64
+    llvm.call @printI64(%0) : (i64) -> ()
+    llvm.call @printNewline() : () -> ()
+    // CHECK: 1
+    llvm.return
+  }
+  llvm.func @entry() {
+    %0 = llvm.mlir.constant(2 : i64) : i64
+    llvm.call @printI64(%0) : (i64) -> ()
+    llvm.call @printNewline() : () -> ()
+    // CHECK: 2
+    llvm.return
+  }
+  llvm.func @dtor() {
+    %0 = llvm.mlir.constant(3 : i64) : i64
+    llvm.call @printI64(%0) : (i64) -> ()
+    llvm.call @printNewline() : () -> ()
+    // CHECK: 3
+    llvm.return
+  }
+}

[c-rhodes]

LGTM, thanks for fixing, cheers