ef2531b63c
These are identified by misc-include-cleaner. I've filtered out those that break builds. Also, I'm staying away from llvm-config.h, config.h, and Compiler.h, which likely cause platform- or compiler-specific build failures.
55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
//===- ReduceFunctions.cpp - Specialized Delta Pass -----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a function which calls the Generic Delta pass in order
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// to reduce functions (and any instruction that calls it) in the provided
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// Module.
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//
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//===----------------------------------------------------------------------===//
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#include "ReduceFunctions.h"
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#include "Utils.h"
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#include "llvm/Transforms/Utils/Cloning.h"
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#include "llvm/Transforms/Utils/ModuleUtils.h"
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using namespace llvm;
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/// Removes all the Defined Functions
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/// that aren't inside any of the desired Chunks.
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void llvm::reduceFunctionsDeltaPass(Oracle &O, ReducerWorkItem &WorkItem) {
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Module &Program = WorkItem.getModule();
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// Record all out-of-chunk functions.
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SmallPtrSet<Constant *, 8> FuncsToRemove;
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for (Function &F : Program.functions()) {
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// Intrinsics don't have function bodies that are useful to
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// reduce. Additionally, intrinsics may have additional operand
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// constraints. But, do drop intrinsics that are not referenced.
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if ((!F.isIntrinsic() || F.use_empty()) && !hasAliasUse(F) &&
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!O.shouldKeep())
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FuncsToRemove.insert(&F);
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}
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removeFromUsedLists(Program, [&FuncsToRemove](Constant *C) {
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return FuncsToRemove.count(C);
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});
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// Then, drop body of each of them. We want to batch this and do nothing else
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// here so that minimal number of remaining external uses will remain.
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for (Constant *F : FuncsToRemove)
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F->dropAllReferences();
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// And finally, we can actually delete them.
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for (Constant *F : FuncsToRemove) {
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// Replace all *still* remaining uses with the default value.
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F->replaceAllUsesWith(getDefaultValue(F->getType()));
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// And finally, fully drop it.
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cast<Function>(F)->eraseFromParent();
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}
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}
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