mirror of
https://github.com/c64scene-ar/llvm-6502.git
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d04a8d4b33
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 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/Function.h"
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#include "llvm/Instructions.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/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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