LLVM  14.0.0git
GlobalSplit.h
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1 //===- GlobalSplit.h - global variable splitter -----------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This pass uses inrange annotations on GEP indices to split globals where
10 // beneficial. Clang currently attaches these annotations to references to
11 // virtual table globals under the Itanium ABI for the benefit of the
12 // whole-program virtual call optimization and control flow integrity passes.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_TRANSFORMS_IPO_GLOBALSPLIT_H
17 #define LLVM_TRANSFORMS_IPO_GLOBALSPLIT_H
18 
19 #include "llvm/IR/PassManager.h"
20 
21 namespace llvm {
22 
23 class Module;
24 
25 /// Pass to perform split of global variables.
26 class GlobalSplitPass : public PassInfoMixin<GlobalSplitPass> {
27 public:
29 };
30 
31 } // end namespace llvm
32 
33 #endif // LLVM_TRANSFORMS_IPO_GLOBALSPLIT_H
llvm::PreservedAnalyses
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:155
llvm::GlobalSplitPass::run
PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM)
Definition: GlobalSplit.cpp:189
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AllocatorList.h:23
M
We currently emits eax Perhaps this is what we really should generate is Is imull three or four cycles eax eax The current instruction priority is based on pattern complexity The former is more complex because it folds a load so the latter will not be emitted Perhaps we should use AddedComplexity to give LEA32r a higher priority We should always try to match LEA first since the LEA matching code does some estimate to determine whether the match is profitable if we care more about code then imull is better It s two bytes shorter than movl leal On a Pentium M
Definition: README.txt:252
llvm::PassInfoMixin
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:374
llvm::GlobalSplitPass
Pass to perform split of global variables.
Definition: GlobalSplit.h:26
llvm::Module
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:67
Module
Machine Check Debug Module
Definition: MachineCheckDebugify.cpp:122
PassManager.h
llvm::AnalysisManager
A container for analyses that lazily runs them and caches their results.
Definition: InstructionSimplify.h:44