Merge pull request #1592 from Idclip/llvm15

Added basic support for LLVM 15 in OpenVDB AX

Author: Idclip

.github/workflows/weekly.yml

@@ -233,8 +233,7 @@ jobs:
       matrix:
         config:
           - { cxx: 'clang++', build: 'Release', llvm: '14', dir: '@14' }
-          # Can't support LLVM >= 15
-          #- { cxx: 'clang++', build: 'Release', llvm: 'latest', dir: '' }
+          - { cxx: 'clang++', build: 'Release', llvm: 'latest', dir: '' }
       fail-fast: false
     steps:
       - uses: actions/checkout@v2

openvdb_ax/openvdb_ax/CMakeLists.txt

@@ -113,9 +113,9 @@ else()
   set(LLVM_LIBS "${_llvm_libs}")
 endif()
 
-if(LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 15.0.0)
+if(LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 16.0.0)
   # https://llvm.org/docs/OpaquePointers.html
-  message(FATAL_ERROR "OpenVDB AX does not currently support LLVM versions >= 15 due to \
+  message(FATAL_ERROR "OpenVDB AX does not currently support LLVM versions >= 16 due to \
     opaque pointer changes in LLVM. Found unsuitable LLVM version \"${LLVM_PACKAGE_VERSION}\"")
 endif()
 
@@ -319,6 +319,11 @@ if(OPENVDB_AX_STATIC)
   )
 
   target_link_libraries(openvdb_ax_static PUBLIC ${OPENVDB_AX_CORE_DEPENDENT_LIBS})
+
+  # @todo fix opaque pointer requirements
+  if(LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 15.0.0)
+    target_compile_options(openvdb_ax_static PUBLIC "-Wno-error=deprecated-declarations")
+  endif()
 endif()
 
 # Configure shared build
@@ -351,6 +356,10 @@ if(OPENVDB_AX_SHARED)
     )
 
   target_link_libraries(openvdb_ax_shared PUBLIC ${OPENVDB_AX_CORE_DEPENDENT_LIBS})
+  # @todo fix opaque pointer requirements
+  if(LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 15.0.0)
+    target_compile_options(openvdb_ax_shared PUBLIC "-Wno-error=deprecated-declarations")
+  endif()
 endif()
 
 install(FILES ax.h Exceptions.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/openvdb_ax/)

openvdb_ax/openvdb_ax/compiler/Compiler.cc

@@ -113,13 +113,15 @@ initializeExecutionEngine(std::unique_ptr<llvm::Module> M, Logger& logger)
 
 #ifndef USE_NEW_PASS_MANAGER
 
+#if LLVM_VERSION_MAJOR < 15
 void addStandardLinkPasses(llvm::legacy::PassManagerBase& passes)
 {
     llvm::PassManagerBuilder builder;
     builder.VerifyInput = true;
     builder.Inliner = llvm::createFunctionInliningPass();
     builder.populateLTOPassManager(passes);
 }
+#endif
 
 /// This routine adds optimization passes based on selected optimization level
 ///
@@ -129,7 +131,6 @@ void addOptimizationPasses(llvm::legacy::PassManagerBase& passes,
                            const unsigned optLevel,
                            const unsigned sizeLevel,
                            const bool disableInline = false,
-                           const bool disableUnitAtATime = false,
                            const bool disableLoopUnrolling = false,
                            const bool disableLoopVectorization = false,
                            const bool disableSLPVectorization = false)
@@ -148,14 +149,6 @@ void addOptimizationPasses(llvm::legacy::PassManagerBase& passes,
         builder.Inliner = llvm::createAlwaysInlinerLegacyPass();
     }
 
-#if LLVM_VERSION_MAJOR < 9
-    // Enable IPO. This corresponds to gcc's -funit-at-a-time
-    builder.DisableUnitAtATime = disableUnitAtATime;
-#else
-    // unused from llvm 9
-    (void)(disableUnitAtATime);
-#endif
-
     // Disable loop unrolling in all relevant passes
     builder.DisableUnrollLoops =
         disableLoopUnrolling ? disableLoopUnrolling : optLevel == 0;
@@ -198,7 +191,9 @@ void LLVMoptimise(llvm::Module& module,
     else    functionPasses.add(llvm::createTargetTransformInfoWrapperPass(llvm::TargetIRAnalysis()));
 
 
+#if LLVM_VERSION_MAJOR < 15
     addStandardLinkPasses(passes);
+#endif
     addOptimizationPasses(passes, functionPasses, TM, optLevel, sizeLevel);
 
     functionPasses.doInitialization();
@@ -663,6 +658,11 @@ Compiler::Compiler(const CompilerOptions& options)
     , mFunctionRegistry()
 {
     mContext.reset(new llvm::LLVMContext);
+#if LLVM_VERSION_MAJOR >= 15
+    // This will not work from LLVM 16. We'll need to fix this
+    // https://llvm.org/docs/OpaquePointers.html
+    mContext->setOpaquePointers(false);
+#endif
     mFunctionRegistry = codegen::createDefaultRegistry(&options.mFunctionOptions);
 }
 

openvdb_ax/openvdb_ax/test/backend/TestCodecs.cc

@@ -65,6 +65,11 @@ void TestCodecs::testRegisteredCodecs()
     // enforced as part of the API but the majority of the setup code is internal.
 
     llvm::LLVMContext C;
+#if LLVM_VERSION_MAJOR >= 15
+    // This will not work from LLVM 16. We'll need to fix this
+    // https://llvm.org/docs/OpaquePointers.html
+    C.setOpaquePointers(false);
+#endif
 
     // Get all unique registered codecs
     std::set<const Codec*> codecs;

openvdb_ax/openvdb_ax/test/backend/util.h

@@ -21,7 +21,13 @@ namespace unittest_util
 struct LLVMState
 {
     LLVMState(const std::string& name = "__test_module")
-        : mCtx(new llvm::LLVMContext), mModule(new llvm::Module(name, *mCtx)) {}
+        : mCtx(new llvm::LLVMContext), mModule(new llvm::Module(name, *mCtx)) {
+#if LLVM_VERSION_MAJOR >= 15
+    // This will not work from LLVM 16. We'll need to fix this
+    // https://llvm.org/docs/OpaquePointers.html
+    mCtx->setOpaquePointers(false);
+#endif
+        }
 
     llvm::LLVMContext& context() { return *mCtx; }
     llvm::Module& module() { return *mModule; }

openvdb_ax/openvdb_ax/test/compiler/TestVolumeExecutable.cc

@@ -47,6 +47,12 @@ TestVolumeExecutable::testConstructionDestruction()
     CPPUNIT_ASSERT(openvdb::ax::isInitialized());
 
     std::shared_ptr<llvm::LLVMContext> C(new llvm::LLVMContext);
+#if LLVM_VERSION_MAJOR >= 15
+    // This will not work from LLVM 16. We'll need to fix this
+    // https://llvm.org/docs/OpaquePointers.html
+    C->setOpaquePointers(false);
+#endif
+
     std::unique_ptr<llvm::Module> M(new llvm::Module("test_module", *C));
     std::shared_ptr<const llvm::ExecutionEngine> E(llvm::EngineBuilder(std::move(M))
             .setEngineKind(llvm::EngineKind::JIT)

openvdb_ax/openvdb_ax/test/integration/TestVDBFunctions.cc

@@ -368,6 +368,12 @@ void
 TestVDBFunctions::testValidContext()
 {
     std::shared_ptr<llvm::LLVMContext> C(new llvm::LLVMContext);
+#if LLVM_VERSION_MAJOR >= 15
+    // This will not work from LLVM 16. We'll need to fix this
+    // https://llvm.org/docs/OpaquePointers.html
+    C->setOpaquePointers(false);
+#endif
+
     openvdb::ax::Compiler compiler;
     openvdb::ax::FunctionOptions ops;
     ops.mLazyFunctions = false;

pendingchanges/vdb_ax.txt

@@ -1,4 +1,7 @@
 AX:
+- Improvements:
+    Added support for LLVM 15
+
 - Bug Fix:
     Fixed an incorrect option in the `vdb_ax` command line tool where the default
     optimization level was set to NONE instead of O3 (issue introduced in 10.0.0).