The ARC language-specific optimizer. Credit to Dan Gohman.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133108 91177308-0d34-0410-b5e6-96231b3b80d8
rust-lang · Jun 15, 2011 · 9fbd318 · 9fbd318
1 parent 5f36bb1
commit 9fbd318
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diff --git a/include/llvm/Analysis/Passes.h b/include/llvm/Analysis/Passes.h
@@ -86,6 +86,13 @@ namespace llvm {
   //
   ImmutablePass *createTypeBasedAliasAnalysisPass();
 
+  //===--------------------------------------------------------------------===//
+  //
+  // createObjCARCAliasAnalysisPass - This pass implements ObjC-ARC-based
+  // alias analysis.
+  //
+  ImmutablePass *createObjCARCAliasAnalysisPass();
+
   //===--------------------------------------------------------------------===//
   //
   // createProfileLoaderPass - This pass loads information from a profile dump

diff --git a/include/llvm/InitializePasses.h b/include/llvm/InitializePasses.h
@@ -160,6 +160,10 @@ void initializeModuleDebugInfoPrinterPass(PassRegistry&);
 void initializeNoAAPass(PassRegistry&);
 void initializeNoProfileInfoPass(PassRegistry&);
 void initializeNoPathProfileInfoPass(PassRegistry&);
+void initializeObjCARCAliasAnalysisPass(PassRegistry&);
+void initializeObjCARCExpandPass(PassRegistry&);
+void initializeObjCARCContractPass(PassRegistry&);
+void initializeObjCARCOptPass(PassRegistry&);
 void initializeOptimalEdgeProfilerPass(PassRegistry&);
 void initializeOptimizePHIsPass(PassRegistry&);
 void initializePEIPass(PassRegistry&);

diff --git a/include/llvm/LinkAllPasses.h b/include/llvm/LinkAllPasses.h
@@ -97,6 +97,10 @@ namespace {
       (void) llvm::createLowerSwitchPass();
       (void) llvm::createNoAAPass();
       (void) llvm::createNoProfileInfoPass();
+      (void) llvm::createObjCARCAliasAnalysisPass();
+      (void) llvm::createObjCARCExpandPass();
+      (void) llvm::createObjCARCContractPass();
+      (void) llvm::createObjCARCOptPass();
       (void) llvm::createProfileEstimatorPass();
       (void) llvm::createProfileVerifierPass();
       (void) llvm::createPathProfileVerifierPass();

diff --git a/include/llvm/Support/PassManagerBuilder.h b/include/llvm/Support/PassManagerBuilder.h
@@ -188,6 +188,7 @@ class PassManagerBuilder {
       MPM.add(createArgumentPromotionPass());   // Scalarize uninlined fn args
 
     // Start of function pass.
+    MPM.add(createObjCARCExpandPass());         // Canonicalize ObjC ARC code.
     // Break up aggregate allocas, using SSAUpdater.
     MPM.add(createScalarReplAggregatesPass(-1, false));
     MPM.add(createEarlyCSEPass());              // Catch trivial redundancies
@@ -223,6 +224,7 @@ class PassManagerBuilder {
     MPM.add(createJumpThreadingPass());         // Thread jumps
     MPM.add(createCorrelatedValuePropagationPass());
     MPM.add(createDeadStoreEliminationPass());  // Delete dead stores
+    MPM.add(createObjCARCOptPass());            // Objective-C ARC optimizations.
     MPM.add(createAggressiveDCEPass());         // Delete dead instructions
     MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
     MPM.add(createInstructionCombiningPass());  // Clean up after everything.

diff --git a/include/llvm/Transforms/Scalar.h b/include/llvm/Transforms/Scalar.h
@@ -336,6 +336,24 @@ Pass *createLowerAtomicPass();
 //
 Pass *createCorrelatedValuePropagationPass();
 
+//===----------------------------------------------------------------------===//
+//
+// ObjCARCExpand - ObjC ARC preliminary simplifications.
+//
+Pass *createObjCARCExpandPass();
+
+//===----------------------------------------------------------------------===//
+//
+// ObjCARCContract - Late ObjC ARC cleanups.
+//
+Pass *createObjCARCContractPass();
+
+//===----------------------------------------------------------------------===//
+//
+// ObjCARCOpt - ObjC ARC optimization.
+//
+Pass *createObjCARCOptPass();
+
 //===----------------------------------------------------------------------===//
 //
 // InstructionSimplifier - Remove redundant instructions.

diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -303,6 +303,10 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
   if (!DisableVerify)
     PM.add(createVerifierPass());
 
+  // Simplify ObjC ARC code. This is done late because it makes re-optimization
+  // difficult.
+  PM.add(createObjCARCContractPass());
+
   // Run loop strength reduction before anything else.
   if (OptLevel != CodeGenOpt::None && !DisableLSR) {
     PM.add(createLoopStrengthReducePass(getTargetLowering()));

diff --git a/lib/Transforms/Scalar/CMakeLists.txt b/lib/Transforms/Scalar/CMakeLists.txt
@@ -20,6 +20,7 @@ add_llvm_library(LLVMScalarOpts
   LoopUnswitch.cpp
   LowerAtomic.cpp
   MemCpyOptimizer.cpp
+  ObjCARC.cpp
   Reassociate.cpp
   Reg2Mem.cpp
   SCCP.cpp