#include "llvm/AutoUpgrade.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
+#include "llvm/Instruction.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/IntrinsicInst.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/CallSite.h"
+#include "llvm/Support/CFG.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/IRBuilder.h"
#include <cstring>
static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
assert(F && "Illegal to upgrade a non-existent Function.");
- // Get the Function's name.
- const std::string& Name = F->getName();
-
- // Convenience
- const FunctionType *FTy = F->getFunctionType();
-
// Quickly eliminate it, if it's not a candidate.
- if (Name.length() <= 8 || Name[0] != 'l' || Name[1] != 'l' ||
- Name[2] != 'v' || Name[3] != 'm' || Name[4] != '.')
+ StringRef Name = F->getName();
+ if (Name.size() <= 8 || !Name.startswith("llvm."))
return false;
+ Name = Name.substr(5); // Strip off "llvm."
- Module *M = F->getParent();
- switch (Name[5]) {
+ switch (Name[0]) {
default: break;
- case 'p':
- // This upgrades the llvm.prefetch intrinsic to accept one more parameter,
- // which is a instruction / data cache identifier. The old version only
- // implicitly accepted the data version.
- if (Name.compare(5,8,"prefetch",8) == 0) {
- // Don't do anything if it has the correct number of arguments already
- if (FTy->getNumParams() == 4)
- break;
-
- assert(FTy->getNumParams() == 3 && "old prefetch takes 3 args!");
- // We first need to change the name of the old (bad) intrinsic, because
- // its type is incorrect, but we cannot overload that name. We
- // arbitrarily unique it here allowing us to construct a correctly named
- // and typed function below.
- F->setName("");
- NewFn = cast<Function>(M->getOrInsertFunction(Name,
- FTy->getReturnType(),
- FTy->getParamType(0),
- FTy->getParamType(1),
- FTy->getParamType(2),
- FTy->getParamType(2),
- (Type*)0));
+ case 'c': {
+ if (Name.startswith("ctlz.") && F->arg_size() == 1) {
+ F->setName(Name + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
+ F->arg_begin()->getType());
return true;
}
-
- break;
- case 'x':
- // This fixes the poorly named crc32 intrinsics
- if (Name.compare(5, 13, "x86.sse42.crc", 13) == 0) {
- const char* NewFnName = NULL;
- if (Name.compare(18, 2, "32", 2) == 0) {
- if (Name.compare(20, 2, ".8") == 0 && Name.length() == 22) {
- NewFnName = "llvm.x86.sse42.crc32.32.8";
- } else if (Name.compare(20, 3, ".16") == 0 && Name.length() == 23) {
- NewFnName = "llvm.x86.sse42.crc32.32.16";
- } else if (Name.compare(20, 3, ".32") == 0 && Name.length() == 23) {
- NewFnName = "llvm.x86.sse42.crc32.32.32";
- }
- }
- else if (Name.compare(18, 2, "64", 2) == 0) {
- if (Name.compare(20, 2, ".8") == 0 && Name.length() == 22) {
- NewFnName = "llvm.x86.sse42.crc32.64.8";
- } else if (Name.compare(20, 3, ".64") == 0 && Name.length() == 23) {
- NewFnName = "llvm.x86.sse42.crc32.64.64";
- }
- }
- if (NewFnName) {
- F->setName(NewFnName);
- NewFn = F;
- return true;
- }
- }
-
- if (Name.compare(5, 16, "x86.sse.loadu.ps", 16) == 0 ||
- Name.compare(5, 17, "x86.sse2.loadu.dq", 17) == 0 ||
- Name.compare(5, 17, "x86.sse2.loadu.pd", 17) == 0) {
- // Calls to these instructions are transformed into unaligned loads.
- NewFn = 0;
+ if (Name.startswith("cttz.") && F->arg_size() == 1) {
+ F->setName(Name + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
+ F->arg_begin()->getType());
return true;
}
-
- if (Name.compare(5, 16, "x86.sse.movnt.ps", 16) == 0 ||
- Name.compare(5, 17, "x86.sse2.movnt.dq", 17) == 0 ||
- Name.compare(5, 17, "x86.sse2.movnt.pd", 17) == 0 ||
- Name.compare(5, 17, "x86.sse2.movnt.i", 16) == 0) {
- // Calls to these instructions are transformed into nontemporal stores.
- NewFn = 0;
- return true;
- }
-
break;
}
+ }
// This may not belong here. This function is effectively being overloaded
// to both detect an intrinsic which needs upgrading, and to provide the
// upgraded intrinsic. All argument and return casting must be provided in
// order to seamlessly integrate with existing context.
void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
- Function *F = CI->getCalledFunction();
- LLVMContext &C = CI->getContext();
- ImmutableCallSite CS(CI);
-
- assert(F && "CallInst has no function associated with it.");
-
- if (!NewFn) {
- if (F->getName() == "llvm.x86.sse.loadu.ps" ||
- F->getName() == "llvm.x86.sse2.loadu.dq" ||
- F->getName() == "llvm.x86.sse2.loadu.pd") {
- // Convert to a native, unaligned load.
- const Type *VecTy = CI->getType();
- const Type *IntTy = IntegerType::get(C, 128);
- IRBuilder<> Builder(C);
- Builder.SetInsertPoint(CI->getParent(), CI);
-
- Value *BC = Builder.CreateBitCast(CI->getArgOperand(0),
- PointerType::getUnqual(IntTy),
- "cast");
- LoadInst *LI = Builder.CreateLoad(BC, CI->getName());
- LI->setAlignment(1); // Unaligned load.
- BC = Builder.CreateBitCast(LI, VecTy, "new.cast");
-
- // Fix up all the uses with our new load.
- if (!CI->use_empty())
- CI->replaceAllUsesWith(BC);
-
- // Remove intrinsic.
- CI->eraseFromParent();
- } else if (F->getName() == "llvm.x86.sse.movnt.ps" ||
- F->getName() == "llvm.x86.sse2.movnt.dq" ||
- F->getName() == "llvm.x86.sse2.movnt.pd" ||
- F->getName() == "llvm.x86.sse2.movnt.i") {
- IRBuilder<> Builder(C);
- Builder.SetInsertPoint(CI->getParent(), CI);
-
- Module *M = F->getParent();
- SmallVector<Value *, 1> Elts;
- Elts.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
- MDNode *Node = MDNode::get(C, Elts);
+ assert(CI->getCalledFunction() && "Intrinsic call is not direct?");
+ if (!NewFn) return;
- Value *Arg0 = CI->getArgOperand(0);
- Value *Arg1 = CI->getArgOperand(1);
-
- // Convert the type of the pointer to a pointer to the stored type.
- Value *BC = Builder.CreateBitCast(Arg0,
- PointerType::getUnqual(Arg1->getType()),
- "cast");
- StoreInst *SI = Builder.CreateStore(Arg1, BC);
- SI->setMetadata(M->getMDKindID("nontemporal"), Node);
- SI->setAlignment(16);
-
- // Remove intrinsic.
- CI->eraseFromParent();
- } else {
- llvm_unreachable("Unknown function for CallInst upgrade.");
- }
- return;
- }
+ LLVMContext &C = CI->getContext();
+ IRBuilder<> Builder(C);
+ Builder.SetInsertPoint(CI->getParent(), CI);
switch (NewFn->getIntrinsicID()) {
- case Intrinsic::prefetch: {
- IRBuilder<> Builder(C);
- Builder.SetInsertPoint(CI->getParent(), CI);
- const llvm::Type *I32Ty = llvm::Type::getInt32Ty(CI->getContext());
-
- // Add the extra "data cache" argument
- Value *Operands[4] = { CI->getArgOperand(0), CI->getArgOperand(1),
- CI->getArgOperand(2),
- llvm::ConstantInt::get(I32Ty, 1) };
- CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+4,
- CI->getName(), CI);
- NewCI->setTailCall(CI->isTailCall());
- NewCI->setCallingConv(CI->getCallingConv());
- // Handle any uses of the old CallInst.
- if (!CI->use_empty())
- // Replace all uses of the old call with the new cast which has the
- // correct type.
- CI->replaceAllUsesWith(NewCI);
-
- // Clean up the old call now that it has been completely upgraded.
+ default:
+ llvm_unreachable("Unknown function for CallInst upgrade.");
+
+ case Intrinsic::ctlz:
+ case Intrinsic::cttz:
+ assert(CI->getNumArgOperands() == 1 &&
+ "Mismatch between function args and call args");
+ StringRef Name = CI->getName();
+ CI->setName(Name + ".old");
+ CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
+ Builder.getFalse(), Name));
CI->eraseFromParent();
- break;
- }
+ return;
}
}
}
}
-/// This function strips all debug info intrinsics, except for llvm.dbg.declare.
-/// If an llvm.dbg.declare intrinsic is invalid, then this function simply
-/// strips that use.
-void llvm::CheckDebugInfoIntrinsics(Module *M) {
- if (Function *FuncStart = M->getFunction("llvm.dbg.func.start")) {
- while (!FuncStart->use_empty())
- cast<CallInst>(FuncStart->use_back())->eraseFromParent();
- FuncStart->eraseFromParent();
- }
-
- if (Function *StopPoint = M->getFunction("llvm.dbg.stoppoint")) {
- while (!StopPoint->use_empty())
- cast<CallInst>(StopPoint->use_back())->eraseFromParent();
- StopPoint->eraseFromParent();
- }
-
- if (Function *RegionStart = M->getFunction("llvm.dbg.region.start")) {
- while (!RegionStart->use_empty())
- cast<CallInst>(RegionStart->use_back())->eraseFromParent();
- RegionStart->eraseFromParent();
- }
-
- if (Function *RegionEnd = M->getFunction("llvm.dbg.region.end")) {
- while (!RegionEnd->use_empty())
- cast<CallInst>(RegionEnd->use_back())->eraseFromParent();
- RegionEnd->eraseFromParent();
- }
-
- if (Function *Declare = M->getFunction("llvm.dbg.declare")) {
- if (!Declare->use_empty()) {
- DbgDeclareInst *DDI = cast<DbgDeclareInst>(Declare->use_back());
- if (!isa<MDNode>(DDI->getArgOperand(0)) ||
- !isa<MDNode>(DDI->getArgOperand(1))) {
- while (!Declare->use_empty()) {
- CallInst *CI = cast<CallInst>(Declare->use_back());
- CI->eraseFromParent();
- }
- Declare->eraseFromParent();
- }
- }
- }
-}
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