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PPU LLVM: New "stack" strategy

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Minor pessimization: all memory accesses are volatile
Special handling of prologues and epilogues
Minor optimizing assumption for SP
This commit is contained in:
Nekotekina 2016-07-24 20:56:14 +03:00
parent 712c04b2ad
commit 5c9f83c3a8
3 changed files with 47 additions and 65 deletions
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27
rpcs3/Emu/Cell/PPUThread.cpp
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@ -585,6 +585,32 @@ extern void ppu_initialize(const std::string& name, const std::vector<ppu_functi
ReplaceInstWithInst(ci, CallInst::Create(f, {ci->getArgOperand(0)}));
}
}
continue;
}
if (const auto li = dyn_cast<LoadInst>(inst))
{
// TODO: more careful check
if (li->getNumUses() == 0)
{
// Remove unreferenced volatile loads
li->eraseFromParent();
}
continue;
}
if (const auto si = dyn_cast<StoreInst>(inst))
{
// TODO: more careful check
if (isa<UndefValue>(si->getOperand(0)) && si->getParent() == &func->getEntryBlock())
{
// Remove undef volatile stores
si->eraseFromParent();
}
continue;
}
}
}
@ -595,6 +621,7 @@ extern void ppu_initialize(const std::string& name, const std::vector<ppu_functi
// Remove unused functions, structs, global variables, etc
mpm.add(createStripDeadPrototypesPass());
//mpm.add(createFunctionInliningPass());
mpm.add(createDeadInstEliminationPass());
mpm.run(*module);
std::string result;