mirror of
https://github.com/c64scene-ar/llvm-6502.git
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7678de45b2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157899 91177308-0d34-0410-b5e6-96231b3b80d8
306 lines
11 KiB
C++
306 lines
11 KiB
C++
//===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
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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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//
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// This file implements the auto-upgrade helper functions
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/AutoUpgrade.h"
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/Instruction.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/Support/CallSite.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/IRBuilder.h"
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#include <cstring>
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using namespace llvm;
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static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
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assert(F && "Illegal to upgrade a non-existent Function.");
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// Quickly eliminate it, if it's not a candidate.
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StringRef Name = F->getName();
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if (Name.size() <= 8 || !Name.startswith("llvm."))
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return false;
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Name = Name.substr(5); // Strip off "llvm."
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switch (Name[0]) {
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default: break;
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case 'c': {
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if (Name.startswith("ctlz.") && F->arg_size() == 1) {
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F->setName(Name + ".old");
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NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
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F->arg_begin()->getType());
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return true;
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}
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if (Name.startswith("cttz.") && F->arg_size() == 1) {
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F->setName(Name + ".old");
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NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
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F->arg_begin()->getType());
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return true;
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}
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break;
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}
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case 'x': {
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if (Name.startswith("x86.sse2.pcmpeq.") ||
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Name.startswith("x86.sse2.pcmpgt.") ||
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Name.startswith("x86.avx2.pcmpeq.") ||
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Name.startswith("x86.avx2.pcmpgt.") ||
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Name.startswith("x86.avx.vpermil.") ||
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Name == "x86.avx.movnt.dq.256" ||
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Name == "x86.avx.movnt.pd.256" ||
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Name == "x86.avx.movnt.ps.256") {
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NewFn = 0;
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return true;
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}
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// Fix the FMA4 intrinsics to remove the 4
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if (Name.startswith("x86.fma4.")) {
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const char* NewFnName = 0;
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if (Name == "x86.fma4.vfmadd.ss")
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NewFnName = "llvm.x86.fma.vfmadd.ss";
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else if (Name == "x86.fma4.vfmadd.sd")
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NewFnName = "llvm.x86.fma.vfmadd.sd";
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else if (Name == "x86.fma4.vfmadd.ps")
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NewFnName = "llvm.x86.fma.vfmadd.ps";
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else if (Name == "x86.fma4.vfmadd.pd")
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NewFnName = "llvm.x86.fma.vfmadd.pd";
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else if (Name == "x86.fma4.vfmadd.ps.256")
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NewFnName = "llvm.x86.fma.vfmadd.ps.256";
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else if (Name == "x86.fma4.vfmadd.pd.256")
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NewFnName = "llvm.x86.fma.vfmadd.pd.256";
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else if (Name == "x86.fma4.vfmsub.ss")
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NewFnName = "llvm.x86.fma.vfmsub.ss";
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else if (Name == "x86.fma4.vfmsub.sd")
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NewFnName = "llvm.x86.fma.vfmsub.sd";
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else if (Name == "x86.fma4.vfmsub.ps")
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NewFnName = "llvm.x86.fma.vfmsub.ps";
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else if (Name == "x86.fma4.vfmsub.pd")
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NewFnName = "llvm.x86.fma.vfmsub.pd";
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else if (Name == "x86.fma4.vfmsub.ps.256")
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NewFnName = "llvm.x86.fma.vfmsub.ps.256";
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else if (Name == "x86.fma4.vfmsub.pd.256")
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NewFnName = "llvm.x86.fma.vfmsub.pd.256";
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else if (Name == "x86.fma4.vfnmadd.ss")
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NewFnName = "llvm.x86.fma.vfnmadd.ss";
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else if (Name == "x86.fma4.vfnmadd.sd")
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NewFnName = "llvm.x86.fma.vfnmadd.sd";
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else if (Name == "x86.fma4.vfnmadd.ps")
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NewFnName = "llvm.x86.fma.vfnmadd.ps";
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else if (Name == "x86.fma4.vfnmadd.pd")
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NewFnName = "llvm.x86.fma.vfnmadd.pd";
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else if (Name == "x86.fma4.vfnmadd.ps.256")
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NewFnName = "llvm.x86.fma.vfnmadd.ps.256";
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else if (Name == "x86.fma4.vfnmadd.pd.256")
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NewFnName = "llvm.x86.fma.vfnmadd.pd.256";
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else if (Name == "x86.fma4.vfnmsub.ss")
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NewFnName = "llvm.x86.fma.vfnmsub.ss";
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else if (Name == "x86.fma4.vfnmsub.sd")
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NewFnName = "llvm.x86.fma.vfnmsub.sd";
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else if (Name == "x86.fma4.vfnmsub.ps")
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NewFnName = "llvm.x86.fma.vfnmsub.ps";
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else if (Name == "x86.fma4.vfnmsub.pd")
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NewFnName = "llvm.x86.fma.vfnmsub.pd";
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else if (Name == "x86.fma4.vfnmsub.ps.256")
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NewFnName = "llvm.x86.fma.vfnmsub.ps.256";
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else if (Name == "x86.fma4.vfnmsub.pd.256")
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NewFnName = "llvm.x86.fma.vfnmsub.pd.256";
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else if (Name == "x86.fma4.vfmaddsub.ps")
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NewFnName = "llvm.x86.fma.vfmaddsub.ps";
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else if (Name == "x86.fma4.vfmaddsub.pd")
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NewFnName = "llvm.x86.fma.vfmaddsub.pd";
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else if (Name == "x86.fma4.vfmaddsub.ps.256")
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NewFnName = "llvm.x86.fma.vfmaddsub.ps.256";
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else if (Name == "x86.fma4.vfmaddsub.pd.256")
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NewFnName = "llvm.x86.fma.vfmaddsub.pd.256";
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else if (Name == "x86.fma4.vfmsubadd.ps")
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NewFnName = "llvm.x86.fma.vfmsubadd.ps";
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else if (Name == "x86.fma4.vfmsubadd.pd")
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NewFnName = "llvm.x86.fma.vfmsubadd.pd";
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else if (Name == "x86.fma4.vfmsubadd.ps.256")
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NewFnName = "llvm.x86.fma.vfmsubadd.ps.256";
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else if (Name == "x86.fma4.vfmsubadd.pd.256")
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NewFnName = "llvm.x86.fma.vfmsubadd.pd.256";
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if (NewFnName) {
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F->setName(NewFnName);
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NewFn = F;
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return true;
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}
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}
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break;
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}
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}
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// This may not belong here. This function is effectively being overloaded
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// to both detect an intrinsic which needs upgrading, and to provide the
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// upgraded form of the intrinsic. We should perhaps have two separate
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// functions for this.
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return false;
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}
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bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
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NewFn = 0;
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bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
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// Upgrade intrinsic attributes. This does not change the function.
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if (NewFn)
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F = NewFn;
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if (unsigned id = F->getIntrinsicID())
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F->setAttributes(Intrinsic::getAttributes((Intrinsic::ID)id));
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return Upgraded;
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}
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bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
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// Nothing to do yet.
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return false;
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}
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// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
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// upgraded intrinsic. All argument and return casting must be provided in
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// order to seamlessly integrate with existing context.
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void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
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Function *F = CI->getCalledFunction();
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LLVMContext &C = CI->getContext();
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IRBuilder<> Builder(C);
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Builder.SetInsertPoint(CI->getParent(), CI);
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assert(F && "Intrinsic call is not direct?");
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if (!NewFn) {
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// Get the Function's name.
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StringRef Name = F->getName();
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Value *Rep;
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// Upgrade packed integer vector compares intrinsics to compare instructions
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if (Name.startswith("llvm.x86.sse2.pcmpeq.") ||
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Name.startswith("llvm.x86.avx2.pcmpeq.")) {
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Rep = Builder.CreateICmpEQ(CI->getArgOperand(0), CI->getArgOperand(1),
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"pcmpeq");
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// need to sign extend since icmp returns vector of i1
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Rep = Builder.CreateSExt(Rep, CI->getType(), "");
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} else if (Name.startswith("llvm.x86.sse2.pcmpgt.") ||
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Name.startswith("llvm.x86.avx2.pcmpgt.")) {
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Rep = Builder.CreateICmpSGT(CI->getArgOperand(0), CI->getArgOperand(1),
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"pcmpgt");
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// need to sign extend since icmp returns vector of i1
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Rep = Builder.CreateSExt(Rep, CI->getType(), "");
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} else if (Name == "llvm.x86.avx.movnt.dq.256" ||
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Name == "llvm.x86.avx.movnt.ps.256" ||
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Name == "llvm.x86.avx.movnt.pd.256") {
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IRBuilder<> Builder(C);
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Builder.SetInsertPoint(CI->getParent(), CI);
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Module *M = F->getParent();
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SmallVector<Value *, 1> Elts;
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Elts.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
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MDNode *Node = MDNode::get(C, Elts);
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Value *Arg0 = CI->getArgOperand(0);
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Value *Arg1 = CI->getArgOperand(1);
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// Convert the type of the pointer to a pointer to the stored type.
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Value *BC = Builder.CreateBitCast(Arg0,
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PointerType::getUnqual(Arg1->getType()),
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"cast");
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StoreInst *SI = Builder.CreateStore(Arg1, BC);
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SI->setMetadata(M->getMDKindID("nontemporal"), Node);
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SI->setAlignment(16);
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// Remove intrinsic.
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CI->eraseFromParent();
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return;
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} else {
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bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
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if (Name == "llvm.x86.avx.vpermil.pd.256")
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PD256 = true;
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else if (Name == "llvm.x86.avx.vpermil.pd")
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PD128 = true;
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else if (Name == "llvm.x86.avx.vpermil.ps.256")
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PS256 = true;
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else if (Name == "llvm.x86.avx.vpermil.ps")
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PS128 = true;
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if (PD256 || PD128 || PS256 || PS128) {
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Value *Op0 = CI->getArgOperand(0);
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unsigned Imm = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
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SmallVector<Constant*, 8> Idxs;
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if (PD128)
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for (unsigned i = 0; i != 2; ++i)
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Idxs.push_back(Builder.getInt32((Imm >> i) & 0x1));
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else if (PD256)
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for (unsigned l = 0; l != 4; l+=2)
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for (unsigned i = 0; i != 2; ++i)
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Idxs.push_back(Builder.getInt32(((Imm >> (l+i)) & 0x1) + l));
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else if (PS128)
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for (unsigned i = 0; i != 4; ++i)
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Idxs.push_back(Builder.getInt32((Imm >> (2 * i)) & 0x3));
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else if (PS256)
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for (unsigned l = 0; l != 8; l+=4)
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for (unsigned i = 0; i != 4; ++i)
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Idxs.push_back(Builder.getInt32(((Imm >> (2 * i)) & 0x3) + l));
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else
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llvm_unreachable("Unexpected function");
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Rep = Builder.CreateShuffleVector(Op0, Op0, ConstantVector::get(Idxs));
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} else {
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llvm_unreachable("Unknown function for CallInst upgrade.");
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}
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}
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CI->replaceAllUsesWith(Rep);
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CI->eraseFromParent();
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return;
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}
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switch (NewFn->getIntrinsicID()) {
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default:
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llvm_unreachable("Unknown function for CallInst upgrade.");
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case Intrinsic::ctlz:
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case Intrinsic::cttz:
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assert(CI->getNumArgOperands() == 1 &&
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"Mismatch between function args and call args");
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StringRef Name = CI->getName();
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CI->setName(Name + ".old");
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CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
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Builder.getFalse(), Name));
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CI->eraseFromParent();
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return;
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}
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}
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// This tests each Function to determine if it needs upgrading. When we find
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// one we are interested in, we then upgrade all calls to reflect the new
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// function.
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void llvm::UpgradeCallsToIntrinsic(Function* F) {
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assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
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// Upgrade the function and check if it is a totaly new function.
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Function *NewFn;
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if (UpgradeIntrinsicFunction(F, NewFn)) {
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if (NewFn != F) {
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// Replace all uses to the old function with the new one if necessary.
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for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
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UI != UE; ) {
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if (CallInst *CI = dyn_cast<CallInst>(*UI++))
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UpgradeIntrinsicCall(CI, NewFn);
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}
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// Remove old function, no longer used, from the module.
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F->eraseFromParent();
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}
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}
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}
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