mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-27 14:45:50 +00:00
7962dbdc65
definition below all of the header #include lines, lib/Transforms/... edition. This one is tricky for two reasons. We again have a couple of passes that define something else before the includes as well. I've sunk their name macros with the DEBUG_TYPE. Also, InstCombine contains headers that need DEBUG_TYPE, so now those headers #define and #undef DEBUG_TYPE around their code, leaving them well formed modular headers. Fixing these headers was a large motivation for all of these changes, as "leaky" macros of this form are hard on the modules implementation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206844 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
//===- LowerInvoke.cpp - Eliminate Invoke instructions --------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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/Scalar.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/Pass.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "lowerinvoke"
|
|
|
|
STATISTIC(NumInvokes, "Number of invokes replaced");
|
|
|
|
namespace {
|
|
class LowerInvoke : public FunctionPass {
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
explicit LowerInvoke() : FunctionPass(ID) {
|
|
initializeLowerInvokePass(*PassRegistry::getPassRegistry());
|
|
}
|
|
bool runOnFunction(Function &F) override;
|
|
};
|
|
}
|
|
|
|
char LowerInvoke::ID = 0;
|
|
INITIALIZE_PASS(LowerInvoke, "lowerinvoke",
|
|
"Lower invoke and unwind, for unwindless code generators",
|
|
false, false)
|
|
|
|
char &llvm::LowerInvokePassID = LowerInvoke::ID;
|
|
|
|
// Public Interface To the LowerInvoke pass.
|
|
FunctionPass *llvm::createLowerInvokePass() {
|
|
return new LowerInvoke();
|
|
}
|
|
|
|
bool LowerInvoke::runOnFunction(Function &F) {
|
|
bool Changed = false;
|
|
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
|
|
if (InvokeInst *II = dyn_cast<InvokeInst>(BB->getTerminator())) {
|
|
SmallVector<Value*,16> CallArgs(II->op_begin(), II->op_end() - 3);
|
|
// Insert a normal call instruction...
|
|
CallInst *NewCall = CallInst::Create(II->getCalledValue(),
|
|
CallArgs, "", 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;
|
|
}
|