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https://github.com/c64scene-ar/llvm-6502.git
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5a81e14385
This patch introduces a new mechanism that allows IR modules to co-operatively build pointer sets corresponding to addresses within a given set of globals. One particular use case for this is to allow a C++ program to efficiently verify (at each call site) that a vtable pointer is in the set of valid vtable pointers for the class or its derived classes. One way of doing this is for a toolchain component to build, for each class, a bit set that maps to the memory region allocated for the vtables, such that each 1 bit in the bit set maps to a valid vtable for that class, and lay out the vtables next to each other, to minimize the total size of the bit sets. The patch introduces a metadata format for representing pointer sets, an '@llvm.bitset.test' intrinsic and an LTO lowering pass that lays out the globals and builds the bitsets, and documents the new feature. Differential Revision: http://reviews.llvm.org/D7288 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230054 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
//===-- IPO.cpp -----------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the common infrastructure (including C bindings) for
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// libLLVMIPO.a, which implements several transformations over the LLVM
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// intermediate representation.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm-c/Initialization.h"
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#include "llvm-c/Transforms/IPO.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/Transforms/IPO.h"
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using namespace llvm;
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void llvm::initializeIPO(PassRegistry &Registry) {
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initializeArgPromotionPass(Registry);
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initializeConstantMergePass(Registry);
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initializeDAEPass(Registry);
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initializeDAHPass(Registry);
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initializeFunctionAttrsPass(Registry);
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initializeGlobalDCEPass(Registry);
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initializeGlobalOptPass(Registry);
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initializeIPCPPass(Registry);
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initializeAlwaysInlinerPass(Registry);
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initializeSimpleInlinerPass(Registry);
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initializeInternalizePassPass(Registry);
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initializeLoopExtractorPass(Registry);
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initializeBlockExtractorPassPass(Registry);
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initializeSingleLoopExtractorPass(Registry);
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initializeLowerBitSetsPass(Registry);
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initializeMergeFunctionsPass(Registry);
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initializePartialInlinerPass(Registry);
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initializePruneEHPass(Registry);
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initializeStripDeadPrototypesPassPass(Registry);
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initializeStripSymbolsPass(Registry);
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initializeStripDebugDeclarePass(Registry);
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initializeStripDeadDebugInfoPass(Registry);
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initializeStripNonDebugSymbolsPass(Registry);
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initializeBarrierNoopPass(Registry);
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}
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void LLVMInitializeIPO(LLVMPassRegistryRef R) {
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initializeIPO(*unwrap(R));
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}
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void LLVMAddArgumentPromotionPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createArgumentPromotionPass());
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}
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void LLVMAddConstantMergePass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createConstantMergePass());
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}
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void LLVMAddDeadArgEliminationPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createDeadArgEliminationPass());
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}
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void LLVMAddFunctionAttrsPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createFunctionAttrsPass());
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}
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void LLVMAddFunctionInliningPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createFunctionInliningPass());
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}
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void LLVMAddAlwaysInlinerPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(llvm::createAlwaysInlinerPass());
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}
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void LLVMAddGlobalDCEPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createGlobalDCEPass());
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}
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void LLVMAddGlobalOptimizerPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createGlobalOptimizerPass());
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}
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void LLVMAddIPConstantPropagationPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createIPConstantPropagationPass());
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}
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void LLVMAddPruneEHPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createPruneEHPass());
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}
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void LLVMAddIPSCCPPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createIPSCCPPass());
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}
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void LLVMAddInternalizePass(LLVMPassManagerRef PM, unsigned AllButMain) {
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std::vector<const char *> Export;
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if (AllButMain)
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Export.push_back("main");
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unwrap(PM)->add(createInternalizePass(Export));
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}
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void LLVMAddStripDeadPrototypesPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createStripDeadPrototypesPass());
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}
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void LLVMAddStripSymbolsPass(LLVMPassManagerRef PM) {
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unwrap(PM)->add(createStripSymbolsPass());
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}
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