mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-16 11:30:51 +00:00
00e08fcaa0
Add header guards to files that were missing guards. Remove #endif comments as they don't seem common in LLVM (we can easily add them back if we decide they're useful) Changes made by clang-tidy with minor tweaks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215558 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//===-- UnifyFunctionExitNodes.h - Ensure fn's have one return --*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This pass is used to ensure that functions have at most one return and one
|
|
// unwind instruction in them. Additionally, it keeps track of which node is
|
|
// the new exit node of the CFG. If there are no return or unwind instructions
|
|
// in the function, the getReturnBlock/getUnwindBlock methods will return a null
|
|
// pointer.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H
|
|
#define LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H
|
|
|
|
#include "llvm/Pass.h"
|
|
|
|
namespace llvm {
|
|
|
|
struct UnifyFunctionExitNodes : public FunctionPass {
|
|
BasicBlock *ReturnBlock, *UnwindBlock, *UnreachableBlock;
|
|
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
UnifyFunctionExitNodes() : FunctionPass(ID),
|
|
ReturnBlock(nullptr), UnwindBlock(nullptr) {
|
|
initializeUnifyFunctionExitNodesPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
// We can preserve non-critical-edgeness when we unify function exit nodes
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override;
|
|
|
|
// getReturn|Unwind|UnreachableBlock - Return the new single (or nonexistent)
|
|
// return, unwind, or unreachable basic blocks in the CFG.
|
|
//
|
|
BasicBlock *getReturnBlock() const { return ReturnBlock; }
|
|
BasicBlock *getUnwindBlock() const { return UnwindBlock; }
|
|
BasicBlock *getUnreachableBlock() const { return UnreachableBlock; }
|
|
|
|
bool runOnFunction(Function &F) override;
|
|
};
|
|
|
|
Pass *createUnifyFunctionExitNodesPass();
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|