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//===-- PNaClABISimplify.cpp - Lists PNaCl ABI simplification passes ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the meta-passes "-pnacl-abi-simplify-preopt"
// and "-pnacl-abi-simplify-postopt". It lists their constituent
// passes.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/NaCl.h"
#include "llvm/PassManager.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/NaCl.h"
#include "llvm/Transforms/Scalar.h"
using namespace llvm;
void llvm::PNaClABISimplifyAddPreOptPasses(PassManager &PM) {
// LowerInvoke prevents use of C++ exception handling, which is not
// yet supported in the PNaCl ABI.
PM.add(createLowerInvokePass());
// Remove landingpad blocks made unreachable by LowerInvoke.
PM.add(createCFGSimplificationPass());
PM.add(createExpandVarArgsPass());
PM.add(createExpandCtorsPass());
PM.add(createResolveAliasesPass());
PM.add(createExpandTlsPass());
// GlobalCleanup needs to run after ExpandTls because
// __tls_template_start etc. are extern_weak before expansion
PM.add(createGlobalCleanupPass());
// Strip dead prototytes to appease the intrinsic ABI checks
// (ExpandVarArgs leaves around var-arg intrinsics).
PM.add(createStripDeadPrototypesPass());
}
void llvm::PNaClABISimplifyAddPostOptPasses(PassManager &PM) {
// We place ExpandByVal after optimization passes because some byval
// arguments can be expanded away by the ArgPromotion pass. Leaving
// in "byval" during optimization also allows some dead stores to be
// eliminated, because "byval" is a stronger constraint than what
// ExpandByVal expands it to.
PM.add(createExpandByValPass());
// We place StripMetadata after optimization passes because
// optimizations depend on the metadata.
PM.add(createStripMetadataPass());
// FlattenGlobals introduces ConstantExpr bitcasts of globals which
// are expanded out later.
PM.add(createFlattenGlobalsPass());
// We should not place arbitrary passes after ExpandConstantExpr
// because they might reintroduce ConstantExprs.
PM.add(createExpandConstantExprPass());
// ExpandGetElementPtr must follow ExpandConstantExpr to expand the
// getelementptr instructions it creates.
PM.add(createExpandGetElementPtrPass());
// ReplacePtrsWithInts assumes that getelementptr instructions and
// ConstantExprs have already been expanded out.
PM.add(createReplacePtrsWithIntsPass());
}
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