mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-20 03:55:48 -04:00
05da2fe521
This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
//===- LowerInvoke.cpp - Eliminate Invoke instructions --------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This transformation is designed for use by code generators which do not yet
|
|
// support stack unwinding. This pass converts 'invoke' instructions to 'call'
|
|
// instructions, so that any exception-handling 'landingpad' blocks become dead
|
|
// code (which can be removed by running the '-simplifycfg' pass afterwards).
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Transforms/Utils/LowerInvoke.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/Statistic.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/InitializePasses.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Transforms/Utils.h"
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "lowerinvoke"
|
|
|
|
STATISTIC(NumInvokes, "Number of invokes replaced");
|
|
|
|
namespace {
|
|
class LowerInvokeLegacyPass : public FunctionPass {
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
explicit LowerInvokeLegacyPass() : FunctionPass(ID) {
|
|
initializeLowerInvokeLegacyPassPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
bool runOnFunction(Function &F) override;
|
|
};
|
|
}
|
|
|
|
char LowerInvokeLegacyPass::ID = 0;
|
|
INITIALIZE_PASS(LowerInvokeLegacyPass, "lowerinvoke",
|
|
"Lower invoke and unwind, for unwindless code generators",
|
|
false, false)
|
|
|
|
static bool runImpl(Function &F) {
|
|
bool Changed = false;
|
|
for (BasicBlock &BB : F)
|
|
if (InvokeInst *II = dyn_cast<InvokeInst>(BB.getTerminator())) {
|
|
SmallVector<Value *, 16> CallArgs(II->arg_begin(), II->arg_end());
|
|
SmallVector<OperandBundleDef, 1> OpBundles;
|
|
II->getOperandBundlesAsDefs(OpBundles);
|
|
// Insert a normal call instruction...
|
|
CallInst *NewCall =
|
|
CallInst::Create(II->getFunctionType(), II->getCalledValue(),
|
|
CallArgs, OpBundles, "", II);
|
|
NewCall->takeName(II);
|
|
NewCall->setCallingConv(II->getCallingConv());
|
|
NewCall->setAttributes(II->getAttributes());
|
|
NewCall->setDebugLoc(II->getDebugLoc());
|
|
II->replaceAllUsesWith(NewCall);
|
|
|
|
// Insert an unconditional branch to the normal destination.
|
|
BranchInst::Create(II->getNormalDest(), II);
|
|
|
|
// Remove any PHI node entries from the exception destination.
|
|
II->getUnwindDest()->removePredecessor(&BB);
|
|
|
|
// Remove the invoke instruction now.
|
|
BB.getInstList().erase(II);
|
|
|
|
++NumInvokes;
|
|
Changed = true;
|
|
}
|
|
return Changed;
|
|
}
|
|
|
|
bool LowerInvokeLegacyPass::runOnFunction(Function &F) {
|
|
return runImpl(F);
|
|
}
|
|
|
|
namespace llvm {
|
|
char &LowerInvokePassID = LowerInvokeLegacyPass::ID;
|
|
|
|
// Public Interface To the LowerInvoke pass.
|
|
FunctionPass *createLowerInvokePass() { return new LowerInvokeLegacyPass(); }
|
|
|
|
PreservedAnalyses LowerInvokePass::run(Function &F,
|
|
FunctionAnalysisManager &AM) {
|
|
bool Changed = runImpl(F);
|
|
if (!Changed)
|
|
return PreservedAnalyses::all();
|
|
|
|
return PreservedAnalyses::none();
|
|
}
|
|
}
|