Further refactor optimization pass handling

This refactors pass handling to use the argument names, so it can be used
in a similar manner to `opt`. This may be slightly less efficient than the
previous version, but it is much easier to maintain.

It also adds in the ability to specify a custom pipeline on the command
line, this overrides the normal passes, however. This should completely
close #2396.

src/rustllvm/PassWrapper.cpp

@@ -30,10 +30,20 @@ inline T *unwrap(LLVMPassRef P) {
     return Q;
 }
 
-#define WRAP_PASS(name)                             \
-    extern "C" LLVMPassRef LLVMCreate##name##Pass() {      \
-        return wrap(llvm::create##name##Pass());    \
-    }
+extern "C" void LLVMInitializePasses() {
+  PassRegistry &Registry = *PassRegistry::getPassRegistry();
+  initializeCore(Registry);
+  initializeCodeGen(Registry);
+  initializeScalarOpts(Registry);
+  initializeVectorization(Registry);
+  initializeIPO(Registry);
+  initializeAnalysis(Registry);
+  initializeIPA(Registry);
+  initializeTransformUtils(Registry);
+  initializeInstCombine(Registry);
+  initializeInstrumentation(Registry);
+  initializeTarget(Registry);
+}
 
 extern "C" void LLVMAddPass(LLVMPassManagerRef PM, LLVMPassRef P) {
     PassManagerBase * pm = unwrap(PM);
@@ -42,119 +52,14 @@ extern "C" void LLVMAddPass(LLVMPassManagerRef PM, LLVMPassRef P) {
     pm->add(p);
 }
 
-////////////////
-// Transforms //
-// /////////////
+extern "C" LLVMPassRef LLVMCreatePass(const char * PassName) {
+    StringRef SR(PassName);
+    PassRegistry * PR = PassRegistry::getPassRegistry();
 
-// IPO Passes
-WRAP_PASS(StripSymbols)
-WRAP_PASS(StripNonDebugSymbols)
-WRAP_PASS(StripDebugDeclare)
-WRAP_PASS(StripDeadDebugInfo)
-WRAP_PASS(ConstantMerge)
-WRAP_PASS(GlobalOptimizer)
-WRAP_PASS(GlobalDCE)
-WRAP_PASS(AlwaysInliner)
-WRAP_PASS(PruneEH)
-WRAP_PASS(Internalize)
-WRAP_PASS(DeadArgElimination)
-WRAP_PASS(DeadArgHacking)
-WRAP_PASS(ArgumentPromotion)
-WRAP_PASS(IPConstantPropagation)
-WRAP_PASS(IPSCCP)
-WRAP_PASS(LoopExtractor)
-WRAP_PASS(SingleLoopExtractor)
-WRAP_PASS(BlockExtractor)
-WRAP_PASS(StripDeadPrototypes)
-WRAP_PASS(FunctionAttrs)
-WRAP_PASS(MergeFunctions)
-WRAP_PASS(PartialInlining)
-WRAP_PASS(MetaRenamer)
-WRAP_PASS(BarrierNoop)
-
-extern "C" LLVMPassRef LLVMCreateFunctionInliningPass(int Threshold) {
-    return wrap(llvm::createFunctionInliningPass(Threshold));
+    const PassInfo * PI = PR->getPassInfo(SR);
+    if (PI) {
+        return wrap(PI->createPass());
+    } else {
+        return (LLVMPassRef)0;
+    }
 }
-
-// Instrumentation Passes
-WRAP_PASS(EdgeProfiler)
-WRAP_PASS(OptimalEdgeProfiler)
-WRAP_PASS(PathProfiler)
-WRAP_PASS(GCOVProfiler)
-WRAP_PASS(BoundsChecking)
-
-// Scalar Passes
-WRAP_PASS(ConstantPropagation)
-WRAP_PASS(SCCP)
-WRAP_PASS(DeadInstElimination)
-WRAP_PASS(DeadCodeElimination)
-WRAP_PASS(DeadStoreElimination)
-WRAP_PASS(AggressiveDCE)
-WRAP_PASS(SROA)
-WRAP_PASS(ScalarReplAggregates)
-WRAP_PASS(IndVarSimplify)
-WRAP_PASS(InstructionCombining)
-WRAP_PASS(LICM)
-WRAP_PASS(LoopStrengthReduce)
-WRAP_PASS(GlobalMerge)
-WRAP_PASS(LoopUnswitch)
-WRAP_PASS(LoopInstSimplify)
-WRAP_PASS(LoopUnroll)
-WRAP_PASS(LoopRotate)
-WRAP_PASS(LoopIdiom)
-WRAP_PASS(PromoteMemoryToRegister)
-WRAP_PASS(DemoteRegisterToMemory)
-WRAP_PASS(Reassociate)
-WRAP_PASS(JumpThreading)
-WRAP_PASS(CFGSimplification)
-WRAP_PASS(BreakCriticalEdges)
-WRAP_PASS(LoopSimplify)
-WRAP_PASS(TailCallElimination)
-WRAP_PASS(LowerSwitch)
-WRAP_PASS(LowerInvoke)
-WRAP_PASS(BlockPlacement)
-WRAP_PASS(LCSSA)
-WRAP_PASS(EarlyCSE)
-WRAP_PASS(GVN)
-WRAP_PASS(MemCpyOpt)
-WRAP_PASS(LoopDeletion)
-WRAP_PASS(SimplifyLibCalls)
-WRAP_PASS(CodeGenPrepare)
-WRAP_PASS(InstructionNamer)
-WRAP_PASS(Sinking)
-WRAP_PASS(LowerAtomic)
-WRAP_PASS(CorrelatedValuePropagation)
-WRAP_PASS(InstructionSimplifier)
-WRAP_PASS(LowerExpectIntrinsic)
-
-// Vectorize Passes
-WRAP_PASS(BBVectorize)
-WRAP_PASS(LoopVectorize)
-
-//////////////
-// Analyses //
-//////////////
-
-WRAP_PASS(GlobalsModRef)
-WRAP_PASS(AliasAnalysisCounter)
-WRAP_PASS(AAEval)
-WRAP_PASS(NoAA)
-WRAP_PASS(BasicAliasAnalysis)
-WRAP_PASS(ScalarEvolutionAliasAnalysis)
-WRAP_PASS(TypeBasedAliasAnalysis)
-WRAP_PASS(ProfileLoader)
-WRAP_PASS(ProfileMetadataLoader)
-WRAP_PASS(NoProfileInfo)
-WRAP_PASS(ProfileEstimator)
-WRAP_PASS(ProfileVerifier)
-WRAP_PASS(PathProfileLoader)
-WRAP_PASS(NoPathProfileInfo)
-WRAP_PASS(PathProfileVerifier)
-WRAP_PASS(LazyValueInfo)
-WRAP_PASS(DependenceAnalysis)
-WRAP_PASS(CostModelAnalysis)
-WRAP_PASS(InstCount)
-WRAP_PASS(RegionInfo)
-WRAP_PASS(ModuleDebugInfoPrinter)
-WRAP_PASS(Lint)
-WRAP_PASS(Verifier)