[Mlir-commits] [mlir] [mlir][ExecutionEngine] Add support for global constructors and destructors (PR #78070)

[Fabian Mora]

https://github.com/fabianmcg updated https://github.com/llvm/llvm-project/pull/78070

>From a72a40a139271d1b8174e109a56fc201a64b3a46 Mon Sep 17 00:00:00 2001
From: Fabian Mora <fmora.dev at gmail.com>
Date: Sat, 13 Jan 2024 22:31:42 +0000
Subject: [PATCH] [mlir][ExecutionEngine] Add support for global constructors
 and destructors

This patch add support for executing global constructors and destructors in the
`ExecutionEngine`.
---
 mlir/lib/ExecutionEngine/ExecutionEngine.cpp  |  6 ++++
 .../mlir-cpu-runner/global-constructors.mlir  | 32 +++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 mlir/test/mlir-cpu-runner/global-constructors.mlir

diff --git a/mlir/lib/ExecutionEngine/ExecutionEngine.cpp b/mlir/lib/ExecutionEngine/ExecutionEngine.cpp
index 267ec236d3fd59..d4ad2da045e2c4 100644
--- a/mlir/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/mlir/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -219,6 +219,9 @@ ExecutionEngine::ExecutionEngine(bool enableObjectDump,
 }
 
 ExecutionEngine::~ExecutionEngine() {
+  // Execute the global destructors from the module being processed.
+  if (jit)
+    llvm::consumeError(jit->deinitialize(jit->getMainJITDylib()));
   // Run all dynamic library destroy callbacks to prepare for the shutdown.
   for (LibraryDestroyFn destroy : destroyFns)
     destroy();
@@ -396,6 +399,9 @@ ExecutionEngine::create(Operation *m, const ExecutionEngineOptions &options,
   };
   engine->registerSymbols(runtimeSymbolMap);
 
+  // Execute the global constructors from the module being processed.
+  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..3ebcaeccc83e32
--- /dev/null
+++ b/mlir/test/mlir-cpu-runner/global-constructors.mlir
@@ -0,0 +1,32 @@
+// 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
+  }
+}