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https://github.com/c64scene-ar/llvm-6502.git
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0b8c9a80f2
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
//===- NVPTXSplitBBatBar.cpp - Split BB at Barrier --*- C++ -*--===//
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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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// Split basic blocks so that a basic block that contains a barrier instruction
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// only contains the barrier instruction.
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//
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//===----------------------------------------------------------------------===//
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#include "NVPTXSplitBBatBar.h"
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#include "NVPTXUtilities.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/Intrinsics.h"
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#include "llvm/Support/InstIterator.h"
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using namespace llvm;
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namespace llvm {
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FunctionPass *createSplitBBatBarPass();
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}
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char NVPTXSplitBBatBar::ID = 0;
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bool NVPTXSplitBBatBar::runOnFunction(Function &F) {
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SmallVector<Instruction *, 4> SplitPoints;
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bool changed = false;
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// Collect all the split points in SplitPoints
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for (Function::iterator BI = F.begin(), BE = F.end(); BI != BE; ++BI) {
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BasicBlock::iterator IB = BI->begin();
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BasicBlock::iterator II = IB;
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BasicBlock::iterator IE = BI->end();
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// Skit the first intruction. No splitting is needed at this
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// point even if this is a bar.
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while (II != IE) {
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if (IntrinsicInst *inst = dyn_cast<IntrinsicInst>(II)) {
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Intrinsic::ID id = inst->getIntrinsicID();
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// If this is a barrier, split at this instruction
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// and the next instruction.
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if (llvm::isBarrierIntrinsic(id)) {
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if (II != IB)
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SplitPoints.push_back(II);
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II++;
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if ((II != IE) && (!II->isTerminator())) {
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SplitPoints.push_back(II);
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II++;
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}
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continue;
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}
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}
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II++;
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}
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}
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for (unsigned i = 0; i != SplitPoints.size(); i++) {
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changed = true;
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Instruction *inst = SplitPoints[i];
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inst->getParent()->splitBasicBlock(inst, "bar_split");
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}
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return changed;
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}
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// This interface will most likely not be necessary, because this pass will
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// not be invoked by the driver, but will be used as a prerequisite to
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// another pass.
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FunctionPass *llvm::createSplitBBatBarPass() {
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return new NVPTXSplitBBatBar();
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}
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