llvm/lib/Target/AMDGPU/AMDGPUFixFunctionBitcasts.cpp
Chandler Carruth 6b547686c5 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
2019-01-19 08:50:56 +00:00

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1.8 KiB
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//===-- AMDGPUFixFunctionBitcasts.cpp - Fix function bitcasts -------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Promote indirect (bitcast) calls to direct calls when they are statically
/// known to be direct. Required when InstCombine is not run (e.g. at OptNone)
/// because AMDGPU does not support indirect calls.
///
//===----------------------------------------------------------------------===//
#include "AMDGPU.h"
#include "llvm/IR/InstVisitor.h"
#include "llvm/Transforms/Utils/CallPromotionUtils.h"
using namespace llvm;
#define DEBUG_TYPE "amdgpu-fix-function-bitcasts"
namespace {
class AMDGPUFixFunctionBitcasts final
: public ModulePass,
public InstVisitor<AMDGPUFixFunctionBitcasts> {
bool runOnModule(Module &M) override;
bool Modified;
public:
void visitCallSite(CallSite CS) {
if (CS.getCalledFunction())
return;
auto Callee = dyn_cast<Function>(CS.getCalledValue()->stripPointerCasts());
if (Callee && isLegalToPromote(CS, Callee)) {
promoteCall(CS, Callee);
Modified = true;
}
}
static char ID;
AMDGPUFixFunctionBitcasts() : ModulePass(ID) {}
};
} // End anonymous namespace
char AMDGPUFixFunctionBitcasts::ID = 0;
char &llvm::AMDGPUFixFunctionBitcastsID = AMDGPUFixFunctionBitcasts::ID;
INITIALIZE_PASS(AMDGPUFixFunctionBitcasts, DEBUG_TYPE,
"Fix function bitcasts for AMDGPU", false, false)
ModulePass *llvm::createAMDGPUFixFunctionBitcastsPass() {
return new AMDGPUFixFunctionBitcasts();
}
bool AMDGPUFixFunctionBitcasts::runOnModule(Module &M) {
Modified = false;
visit(M);
return Modified;
}