From fb090a675ae78b4b2524b69e42790a8308637cde Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Mon, 21 Sep 2015 22:34:16 +0000
Subject: The R600 target got renamed to AMDGPU, but I missed deleting the old
directory during the vendor import. Delete it now.
---
.../llvm/lib/Target/R600/SIAnnotateControlFlow.cpp | 365 ---------------------
1 file changed, 365 deletions(-)
delete mode 100644 contrib/llvm/lib/Target/R600/SIAnnotateControlFlow.cpp
(limited to 'contrib/llvm/lib/Target/R600/SIAnnotateControlFlow.cpp')
diff --git a/contrib/llvm/lib/Target/R600/SIAnnotateControlFlow.cpp b/contrib/llvm/lib/Target/R600/SIAnnotateControlFlow.cpp
deleted file mode 100644
index ccfbf1b..0000000
--- a/contrib/llvm/lib/Target/R600/SIAnnotateControlFlow.cpp
+++ /dev/null
@@ -1,365 +0,0 @@
-//===-- SIAnnotateControlFlow.cpp - ------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-/// \file
-/// Annotates the control flow with hardware specific intrinsics.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AMDGPU.h"
-#include "llvm/ADT/DepthFirstIterator.h"
-#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/Dominators.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Transforms/Utils/BasicBlockUtils.h"
-#include "llvm/Transforms/Utils/SSAUpdater.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "si-annotate-control-flow"
-
-namespace {
-
-// Complex types used in this pass
-typedef std::pair<BasicBlock *, Value *> StackEntry;
-typedef SmallVector<StackEntry, 16> StackVector;
-
-// Intrinsic names the control flow is annotated with
-static const char *const IfIntrinsic = "llvm.SI.if";
-static const char *const ElseIntrinsic = "llvm.SI.else";
-static const char *const BreakIntrinsic = "llvm.SI.break";
-static const char *const IfBreakIntrinsic = "llvm.SI.if.break";
-static const char *const ElseBreakIntrinsic = "llvm.SI.else.break";
-static const char *const LoopIntrinsic = "llvm.SI.loop";
-static const char *const EndCfIntrinsic = "llvm.SI.end.cf";
-
-class SIAnnotateControlFlow : public FunctionPass {
-
- static char ID;
-
- Type *Boolean;
- Type *Void;
- Type *Int64;
- Type *ReturnStruct;
-
- ConstantInt *BoolTrue;
- ConstantInt *BoolFalse;
- UndefValue *BoolUndef;
- Constant *Int64Zero;
-
- Constant *If;
- Constant *Else;
- Constant *Break;
- Constant *IfBreak;
- Constant *ElseBreak;
- Constant *Loop;
- Constant *EndCf;
-
- DominatorTree *DT;
- StackVector Stack;
-
- LoopInfo *LI;
-
- bool isTopOfStack(BasicBlock *BB);
-
- Value *popSaved();
-
- void push(BasicBlock *BB, Value *Saved);
-
- bool isElse(PHINode *Phi);
-
- void eraseIfUnused(PHINode *Phi);
-
- void openIf(BranchInst *Term);
-
- void insertElse(BranchInst *Term);
-
- Value *handleLoopCondition(Value *Cond, PHINode *Broken, llvm::Loop *L);
-
- void handleLoop(BranchInst *Term);
-
- void closeControlFlow(BasicBlock *BB);
-
-public:
- SIAnnotateControlFlow():
- FunctionPass(ID) { }
-
- bool doInitialization(Module &M) override;
-
- bool runOnFunction(Function &F) override;
-
- const char *getPassName() const override {
- return "SI annotate control flow";
- }
-
- void getAnalysisUsage(AnalysisUsage &AU) const override {
- AU.addRequired<LoopInfoWrapperPass>();
- AU.addRequired<DominatorTreeWrapperPass>();
- AU.addPreserved<DominatorTreeWrapperPass>();
- FunctionPass::getAnalysisUsage(AU);
- }
-
-};
-
-} // end anonymous namespace
-
-char SIAnnotateControlFlow::ID = 0;
-
-/// \brief Initialize all the types and constants used in the pass
-bool SIAnnotateControlFlow::doInitialization(Module &M) {
- LLVMContext &Context = M.getContext();
-
- Void = Type::getVoidTy(Context);
- Boolean = Type::getInt1Ty(Context);
- Int64 = Type::getInt64Ty(Context);
- ReturnStruct = StructType::get(Boolean, Int64, (Type *)nullptr);
-
- BoolTrue = ConstantInt::getTrue(Context);
- BoolFalse = ConstantInt::getFalse(Context);
- BoolUndef = UndefValue::get(Boolean);
- Int64Zero = ConstantInt::get(Int64, 0);
-
- If = M.getOrInsertFunction(
- IfIntrinsic, ReturnStruct, Boolean, (Type *)nullptr);
-
- Else = M.getOrInsertFunction(
- ElseIntrinsic, ReturnStruct, Int64, (Type *)nullptr);
-
- Break = M.getOrInsertFunction(
- BreakIntrinsic, Int64, Int64, (Type *)nullptr);
-
- IfBreak = M.getOrInsertFunction(
- IfBreakIntrinsic, Int64, Boolean, Int64, (Type *)nullptr);
-
- ElseBreak = M.getOrInsertFunction(
- ElseBreakIntrinsic, Int64, Int64, Int64, (Type *)nullptr);
-
- Loop = M.getOrInsertFunction(
- LoopIntrinsic, Boolean, Int64, (Type *)nullptr);
-
- EndCf = M.getOrInsertFunction(
- EndCfIntrinsic, Void, Int64, (Type *)nullptr);
-
- return false;
-}
-
-/// \brief Is BB the last block saved on the stack ?
-bool SIAnnotateControlFlow::isTopOfStack(BasicBlock *BB) {
- return !Stack.empty() && Stack.back().first == BB;
-}
-
-/// \brief Pop the last saved value from the control flow stack
-Value *SIAnnotateControlFlow::popSaved() {
- return Stack.pop_back_val().second;
-}
-
-/// \brief Push a BB and saved value to the control flow stack
-void SIAnnotateControlFlow::push(BasicBlock *BB, Value *Saved) {
- Stack.push_back(std::make_pair(BB, Saved));
-}
-
-/// \brief Can the condition represented by this PHI node treated like
-/// an "Else" block?
-bool SIAnnotateControlFlow::isElse(PHINode *Phi) {
- BasicBlock *IDom = DT->getNode(Phi->getParent())->getIDom()->getBlock();
- for (unsigned i = 0, e = Phi->getNumIncomingValues(); i != e; ++i) {
- if (Phi->getIncomingBlock(i) == IDom) {
-
- if (Phi->getIncomingValue(i) != BoolTrue)
- return false;
-
- } else {
- if (Phi->getIncomingValue(i) != BoolFalse)
- return false;
-
- }
- }
- return true;
-}
-
-// \brief Erase "Phi" if it is not used any more
-void SIAnnotateControlFlow::eraseIfUnused(PHINode *Phi) {
- if (!Phi->hasNUsesOrMore(1))
- Phi->eraseFromParent();
-}
-
-/// \brief Open a new "If" block
-void SIAnnotateControlFlow::openIf(BranchInst *Term) {
- Value *Ret = CallInst::Create(If, Term->getCondition(), "", Term);
- Term->setCondition(ExtractValueInst::Create(Ret, 0, "", Term));
- push(Term->getSuccessor(1), ExtractValueInst::Create(Ret, 1, "", Term));
-}
-
-/// \brief Close the last "If" block and open a new "Else" block
-void SIAnnotateControlFlow::insertElse(BranchInst *Term) {
- Value *Ret = CallInst::Create(Else, popSaved(), "", Term);
- Term->setCondition(ExtractValueInst::Create(Ret, 0, "", Term));
- push(Term->getSuccessor(1), ExtractValueInst::Create(Ret, 1, "", Term));
-}
-
-/// \brief Recursively handle the condition leading to a loop
-Value *SIAnnotateControlFlow::handleLoopCondition(Value *Cond, PHINode *Broken,
- llvm::Loop *L) {
-
- // Only search through PHI nodes which are inside the loop. If we try this
- // with PHI nodes that are outside of the loop, we end up inserting new PHI
- // nodes outside of the loop which depend on values defined inside the loop.
- // This will break the module with
- // 'Instruction does not dominate all users!' errors.
- PHINode *Phi = nullptr;
- if ((Phi = dyn_cast<PHINode>(Cond)) && L->contains(Phi)) {
-
- BasicBlock *Parent = Phi->getParent();
- PHINode *NewPhi = PHINode::Create(Int64, 0, "", &Parent->front());
- Value *Ret = NewPhi;
-
- // Handle all non-constant incoming values first
- for (unsigned i = 0, e = Phi->getNumIncomingValues(); i != e; ++i) {
- Value *Incoming = Phi->getIncomingValue(i);
- BasicBlock *From = Phi->getIncomingBlock(i);
- if (isa<ConstantInt>(Incoming)) {
- NewPhi->addIncoming(Broken, From);
- continue;
- }
-
- Phi->setIncomingValue(i, BoolFalse);
- Value *PhiArg = handleLoopCondition(Incoming, Broken, L);
- NewPhi->addIncoming(PhiArg, From);
- }
-
- BasicBlock *IDom = DT->getNode(Parent)->getIDom()->getBlock();
-
- for (unsigned i = 0, e = Phi->getNumIncomingValues(); i != e; ++i) {
-
- Value *Incoming = Phi->getIncomingValue(i);
- if (Incoming != BoolTrue)
- continue;
-
- BasicBlock *From = Phi->getIncomingBlock(i);
- if (From == IDom) {
- CallInst *OldEnd = dyn_cast<CallInst>(Parent->getFirstInsertionPt());
- if (OldEnd && OldEnd->getCalledFunction() == EndCf) {
- Value *Args[] = { OldEnd->getArgOperand(0), NewPhi };
- Ret = CallInst::Create(ElseBreak, Args, "", OldEnd);
- continue;
- }
- }
- TerminatorInst *Insert = From->getTerminator();
- Value *PhiArg = CallInst::Create(Break, Broken, "", Insert);
- NewPhi->setIncomingValue(i, PhiArg);
- }
- eraseIfUnused(Phi);
- return Ret;
-
- } else if (Instruction *Inst = dyn_cast<Instruction>(Cond)) {
- BasicBlock *Parent = Inst->getParent();
- Instruction *Insert;
- if (L->contains(Inst)) {
- Insert = Parent->getTerminator();
- } else {
- Insert = L->getHeader()->getFirstNonPHIOrDbgOrLifetime();
- }
- Value *Args[] = { Cond, Broken };
- return CallInst::Create(IfBreak, Args, "", Insert);
-
- } else {
- llvm_unreachable("Unhandled loop condition!");
- }
- return 0;
-}
-
-/// \brief Handle a back edge (loop)
-void SIAnnotateControlFlow::handleLoop(BranchInst *Term) {
- BasicBlock *BB = Term->getParent();
- llvm::Loop *L = LI->getLoopFor(BB);
- BasicBlock *Target = Term->getSuccessor(1);
- PHINode *Broken = PHINode::Create(Int64, 0, "", &Target->front());
-
- Value *Cond = Term->getCondition();
- Term->setCondition(BoolTrue);
- Value *Arg = handleLoopCondition(Cond, Broken, L);
-
- for (pred_iterator PI = pred_begin(Target), PE = pred_end(Target);
- PI != PE; ++PI) {
-
- Broken->addIncoming(*PI == BB ? Arg : Int64Zero, *PI);
- }
-
- Term->setCondition(CallInst::Create(Loop, Arg, "", Term));
- push(Term->getSuccessor(0), Arg);
-}/// \brief Close the last opened control flow
-void SIAnnotateControlFlow::closeControlFlow(BasicBlock *BB) {
- llvm::Loop *L = LI->getLoopFor(BB);
-
- if (L && L->getHeader() == BB) {
- // We can't insert an EndCF call into a loop header, because it will
- // get executed on every iteration of the loop, when it should be
- // executed only once before the loop.
- SmallVector <BasicBlock*, 8> Latches;
- L->getLoopLatches(Latches);
-
- std::vector<BasicBlock*> Preds;
- for (pred_iterator PI = pred_begin(BB), PE = pred_end(BB); PI != PE; ++PI) {
- if (std::find(Latches.begin(), Latches.end(), *PI) == Latches.end())
- Preds.push_back(*PI);
- }
- BB = llvm::SplitBlockPredecessors(BB, Preds, "endcf.split", nullptr, DT,
- LI, false);
- }
-
- CallInst::Create(EndCf, popSaved(), "", BB->getFirstInsertionPt());
-}
-
-/// \brief Annotate the control flow with intrinsics so the backend can
-/// recognize if/then/else and loops.
-bool SIAnnotateControlFlow::runOnFunction(Function &F) {
- DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
- LI = &getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
-
- for (df_iterator<BasicBlock *> I = df_begin(&F.getEntryBlock()),
- E = df_end(&F.getEntryBlock()); I != E; ++I) {
-
- BranchInst *Term = dyn_cast<BranchInst>((*I)->getTerminator());
-
- if (!Term || Term->isUnconditional()) {
- if (isTopOfStack(*I))
- closeControlFlow(*I);
- continue;
- }
-
- if (I.nodeVisited(Term->getSuccessor(1))) {
- if (isTopOfStack(*I))
- closeControlFlow(*I);
- handleLoop(Term);
- continue;
- }
-
- if (isTopOfStack(*I)) {
- PHINode *Phi = dyn_cast<PHINode>(Term->getCondition());
- if (Phi && Phi->getParent() == *I && isElse(Phi)) {
- insertElse(Term);
- eraseIfUnused(Phi);
- continue;
- }
- closeControlFlow(*I);
- }
- openIf(Term);
- }
-
- assert(Stack.empty());
- return true;
-}
-
-/// \brief Create the annotation pass
-FunctionPass *llvm::createSIAnnotateControlFlowPass() {
- return new SIAnnotateControlFlow();
-}
--
cgit v1.1