2007-08-04 01:51:18 +00:00
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//===-- 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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2007-12-29 20:36:04 +00:00
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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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2007-08-04 01:51:18 +00:00
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//
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//===----------------------------------------------------------------------===//
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//
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2013-07-20 17:46:00 +00:00
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// This file implements the auto-upgrade helper functions
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2007-08-04 01:51:18 +00:00
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/AutoUpgrade.h"
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2013-01-02 11:36:10 +00:00
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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2011-08-25 23:22:40 +00:00
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#include "llvm/Support/CFG.h"
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2012-06-29 12:38:19 +00:00
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#include "llvm/Support/CallSite.h"
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2009-07-11 20:10:48 +00:00
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#include "llvm/Support/ErrorHandling.h"
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2008-02-20 11:08:44 +00:00
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#include <cstring>
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2007-08-04 01:51:18 +00:00
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using namespace llvm;
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2012-06-10 18:42:51 +00:00
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// Upgrade the declarations of the SSE4.1 functions whose arguments have
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// changed their type from v4f32 to v2i64.
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static bool UpgradeSSE41Function(Function* F, Intrinsic::ID IID,
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Function *&NewFn) {
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// Check whether this is an old version of the function, which received
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// v4f32 arguments.
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Type *Arg0Type = F->getFunctionType()->getParamType(0);
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if (Arg0Type != VectorType::get(Type::getFloatTy(F->getContext()), 4))
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return false;
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// Yes, it's old, replace it with new version.
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F->setName(F->getName() + ".old");
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NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
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return true;
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}
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2007-08-04 01:51:18 +00:00
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2007-12-17 22:33:23 +00:00
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static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
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2007-08-04 01:51:18 +00:00
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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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2011-06-18 18:56:39 +00:00
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StringRef Name = F->getName();
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if (Name.size() <= 8 || !Name.startswith("llvm."))
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2007-12-17 22:33:23 +00:00
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return false;
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2011-06-18 18:56:39 +00:00
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Name = Name.substr(5); // Strip off "llvm."
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2011-11-27 08:42:07 +00:00
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2011-06-18 18:56:39 +00:00
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switch (Name[0]) {
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2007-08-04 01:51:18 +00:00
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default: break;
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2012-07-13 23:25:25 +00:00
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case 'a': {
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if (Name.startswith("arm.neon.vclz")) {
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Type* args[2] = {
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2013-07-20 17:46:00 +00:00
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F->arg_begin()->getType(),
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2012-07-13 23:25:25 +00:00
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Type::getInt1Ty(F->getContext())
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};
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// Can't use Intrinsic::getDeclaration here as it adds a ".i1" to
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// the end of the name. Change name from llvm.arm.neon.vclz.* to
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// llvm.ctlz.*
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FunctionType* fType = FunctionType::get(F->getReturnType(), args, false);
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2013-07-20 17:46:00 +00:00
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NewFn = Function::Create(fType, F->getLinkage(),
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2012-07-13 23:25:25 +00:00
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"llvm.ctlz." + Name.substr(14), F->getParent());
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return true;
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}
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2012-07-18 00:02:16 +00:00
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if (Name.startswith("arm.neon.vcnt")) {
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NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctpop,
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F->arg_begin()->getType());
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return true;
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}
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2012-07-13 23:25:25 +00:00
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break;
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}
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2011-12-12 04:26:04 +00:00
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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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2011-12-12 10:57:20 +00:00
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NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
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F->arg_begin()->getType());
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2011-12-12 04:26:04 +00:00
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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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2011-12-12 10:57:20 +00:00
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NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
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F->arg_begin()->getType());
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2011-12-12 04:26:04 +00:00
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return true;
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}
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break;
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}
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2012-02-03 06:10:55 +00:00
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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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2012-04-18 05:24:00 +00:00
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Name.startswith("x86.avx2.pcmpgt.") ||
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2012-05-08 06:58:15 +00:00
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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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2012-06-09 16:46:13 +00:00
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Name == "x86.avx.movnt.ps.256" ||
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(Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
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2012-02-03 06:10:55 +00:00
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NewFn = 0;
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return true;
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}
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2012-06-10 18:42:51 +00:00
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// SSE4.1 ptest functions may have an old signature.
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if (Name.startswith("x86.sse41.ptest")) {
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if (Name == "x86.sse41.ptestc")
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return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestc, NewFn);
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if (Name == "x86.sse41.ptestz")
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return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestz, NewFn);
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if (Name == "x86.sse41.ptestnzc")
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return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
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}
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2012-06-13 07:18:53 +00:00
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// frcz.ss/sd may need to have an argument dropped
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if (Name.startswith("x86.xop.vfrcz.ss") && F->arg_size() == 2) {
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F->setName(Name + ".old");
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NewFn = Intrinsic::getDeclaration(F->getParent(),
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Intrinsic::x86_xop_vfrcz_ss);
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return true;
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}
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if (Name.startswith("x86.xop.vfrcz.sd") && F->arg_size() == 2) {
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F->setName(Name + ".old");
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NewFn = Intrinsic::getDeclaration(F->getParent(),
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Intrinsic::x86_xop_vfrcz_sd);
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return true;
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}
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2012-06-03 08:07:25 +00:00
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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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2012-06-03 16:48:52 +00:00
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F->setName("llvm.x86.fma" + Name.substr(8));
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NewFn = F;
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return true;
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2012-06-03 08:07:25 +00:00
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}
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2012-02-03 06:10:55 +00:00
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break;
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}
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2007-08-04 01:51:18 +00:00
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}
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2012-06-10 18:42:51 +00:00
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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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2007-08-04 01:51:18 +00:00
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// functions for this.
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2007-12-17 22:33:23 +00:00
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return false;
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2007-08-04 01:51:18 +00:00
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}
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2007-12-17 22:33:23 +00:00
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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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2007-12-03 20:06:50 +00:00
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// Upgrade intrinsic attributes. This does not change the function.
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2007-12-17 22:33:23 +00:00
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if (NewFn)
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F = NewFn;
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2009-02-05 01:49:45 +00:00
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if (unsigned id = F->getIntrinsicID())
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2012-10-15 04:46:55 +00:00
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F->setAttributes(Intrinsic::getAttributes(F->getContext(),
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(Intrinsic::ID)id));
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2007-12-03 20:06:50 +00:00
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return Upgraded;
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}
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2010-09-10 18:51:56 +00:00
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bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
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2011-06-18 06:05:24 +00:00
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// Nothing to do yet.
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2010-09-10 18:51:56 +00:00
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return false;
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}
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2012-06-10 18:42:51 +00:00
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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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2007-08-04 01:51:18 +00:00
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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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2012-02-03 06:10:55 +00:00
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Function *F = CI->getCalledFunction();
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2011-12-12 22:59:34 +00:00
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LLVMContext &C = CI->getContext();
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2011-12-12 04:26:04 +00:00
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IRBuilder<> Builder(C);
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Builder.SetInsertPoint(CI->getParent(), CI);
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2012-02-03 06:10:55 +00:00
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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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2012-05-08 06:58:15 +00:00
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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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2012-06-09 16:46:13 +00:00
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} else if (Name.startswith("llvm.x86.xop.vpcom")) {
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Intrinsic::ID intID;
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if (Name.endswith("ub"))
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intID = Intrinsic::x86_xop_vpcomub;
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else if (Name.endswith("uw"))
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intID = Intrinsic::x86_xop_vpcomuw;
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else if (Name.endswith("ud"))
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intID = Intrinsic::x86_xop_vpcomud;
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else if (Name.endswith("uq"))
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intID = Intrinsic::x86_xop_vpcomuq;
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else if (Name.endswith("b"))
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intID = Intrinsic::x86_xop_vpcomb;
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else if (Name.endswith("w"))
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intID = Intrinsic::x86_xop_vpcomw;
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else if (Name.endswith("d"))
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intID = Intrinsic::x86_xop_vpcomd;
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else if (Name.endswith("q"))
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intID = Intrinsic::x86_xop_vpcomq;
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else
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llvm_unreachable("Unknown suffix");
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Name = Name.substr(18); // strip off "llvm.x86.xop.vpcom"
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unsigned Imm;
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if (Name.startswith("lt"))
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Imm = 0;
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else if (Name.startswith("le"))
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Imm = 1;
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else if (Name.startswith("gt"))
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Imm = 2;
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else if (Name.startswith("ge"))
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Imm = 3;
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else if (Name.startswith("eq"))
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Imm = 4;
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else if (Name.startswith("ne"))
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Imm = 5;
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else if (Name.startswith("true"))
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Imm = 6;
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else if (Name.startswith("false"))
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Imm = 7;
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else
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llvm_unreachable("Unknown condition");
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Function *VPCOM = Intrinsic::getDeclaration(F->getParent(), intID);
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Rep = Builder.CreateCall3(VPCOM, CI->getArgOperand(0),
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CI->getArgOperand(1), Builder.getInt8(Imm));
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2012-02-03 06:10:55 +00:00
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} else {
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2012-04-18 05:24:00 +00:00
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bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
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2012-05-08 06:58:15 +00:00
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if (Name == "llvm.x86.avx.vpermil.pd.256")
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2012-04-18 05:24:00 +00:00
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PD256 = true;
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2012-05-08 06:58:15 +00:00
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else if (Name == "llvm.x86.avx.vpermil.pd")
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2012-04-18 05:24:00 +00:00
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PD128 = true;
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2012-05-08 06:58:15 +00:00
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else if (Name == "llvm.x86.avx.vpermil.ps.256")
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2012-04-18 05:24:00 +00:00
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PS256 = true;
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2012-05-08 06:58:15 +00:00
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else if (Name == "llvm.x86.avx.vpermil.ps")
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2012-04-18 05:24:00 +00:00
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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));
|
|
|
|
else if (PS256)
|
|
|
|
for (unsigned l = 0; l != 8; l+=4)
|
|
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
|
|
Idxs.push_back(Builder.getInt32(((Imm >> (2 * i)) & 0x3) + l));
|
|
|
|
else
|
|
|
|
llvm_unreachable("Unexpected function");
|
|
|
|
|
|
|
|
Rep = Builder.CreateShuffleVector(Op0, Op0, ConstantVector::get(Idxs));
|
|
|
|
} else {
|
|
|
|
llvm_unreachable("Unknown function for CallInst upgrade.");
|
|
|
|
}
|
2012-02-03 06:10:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
CI->replaceAllUsesWith(Rep);
|
|
|
|
CI->eraseFromParent();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-07-20 21:09:18 +00:00
|
|
|
std::string Name = CI->getName().str();
|
|
|
|
CI->setName(Name + ".old");
|
2012-06-10 18:42:51 +00:00
|
|
|
|
2011-12-12 04:26:04 +00:00
|
|
|
switch (NewFn->getIntrinsicID()) {
|
|
|
|
default:
|
2011-11-27 08:42:07 +00:00
|
|
|
llvm_unreachable("Unknown function for CallInst upgrade.");
|
2011-12-12 04:26:04 +00:00
|
|
|
|
|
|
|
case Intrinsic::ctlz:
|
2012-05-22 15:25:31 +00:00
|
|
|
case Intrinsic::cttz:
|
2011-12-12 04:26:04 +00:00
|
|
|
assert(CI->getNumArgOperands() == 1 &&
|
|
|
|
"Mismatch between function args and call args");
|
|
|
|
CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
|
|
|
|
Builder.getFalse(), Name));
|
|
|
|
CI->eraseFromParent();
|
|
|
|
return;
|
2012-06-10 18:42:51 +00:00
|
|
|
|
2012-07-13 23:25:25 +00:00
|
|
|
case Intrinsic::arm_neon_vclz: {
|
|
|
|
// Change name from llvm.arm.neon.vclz.* to llvm.ctlz.*
|
|
|
|
CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
|
2012-07-18 00:02:16 +00:00
|
|
|
Builder.getFalse(),
|
2012-07-13 23:25:25 +00:00
|
|
|
"llvm.ctlz." + Name.substr(14)));
|
|
|
|
CI->eraseFromParent();
|
|
|
|
return;
|
|
|
|
}
|
2012-07-18 00:02:16 +00:00
|
|
|
case Intrinsic::ctpop: {
|
|
|
|
CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(0)));
|
|
|
|
CI->eraseFromParent();
|
|
|
|
return;
|
|
|
|
}
|
2012-07-13 23:25:25 +00:00
|
|
|
|
2012-06-13 07:18:53 +00:00
|
|
|
case Intrinsic::x86_xop_vfrcz_ss:
|
|
|
|
case Intrinsic::x86_xop_vfrcz_sd:
|
|
|
|
CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(1),
|
|
|
|
Name));
|
|
|
|
CI->eraseFromParent();
|
|
|
|
return;
|
|
|
|
|
2012-06-10 18:42:51 +00:00
|
|
|
case Intrinsic::x86_sse41_ptestc:
|
|
|
|
case Intrinsic::x86_sse41_ptestz:
|
2012-06-13 07:18:53 +00:00
|
|
|
case Intrinsic::x86_sse41_ptestnzc: {
|
2012-06-10 18:42:51 +00:00
|
|
|
// The arguments for these intrinsics used to be v4f32, and changed
|
|
|
|
// to v2i64. This is purely a nop, since those are bitwise intrinsics.
|
|
|
|
// So, the only thing required is a bitcast for both arguments.
|
|
|
|
// First, check the arguments have the old type.
|
|
|
|
Value *Arg0 = CI->getArgOperand(0);
|
|
|
|
if (Arg0->getType() != VectorType::get(Type::getFloatTy(C), 4))
|
|
|
|
return;
|
|
|
|
|
|
|
|
// Old intrinsic, add bitcasts
|
|
|
|
Value *Arg1 = CI->getArgOperand(1);
|
|
|
|
|
|
|
|
Value *BC0 =
|
|
|
|
Builder.CreateBitCast(Arg0,
|
|
|
|
VectorType::get(Type::getInt64Ty(C), 2),
|
|
|
|
"cast");
|
|
|
|
Value *BC1 =
|
|
|
|
Builder.CreateBitCast(Arg1,
|
|
|
|
VectorType::get(Type::getInt64Ty(C), 2),
|
|
|
|
"cast");
|
|
|
|
|
|
|
|
CallInst* NewCall = Builder.CreateCall2(NewFn, BC0, BC1, Name);
|
|
|
|
CI->replaceAllUsesWith(NewCall);
|
|
|
|
CI->eraseFromParent();
|
|
|
|
return;
|
2007-12-17 22:33:23 +00:00
|
|
|
}
|
2012-06-13 07:18:53 +00:00
|
|
|
}
|
2007-08-04 01:51:18 +00:00
|
|
|
}
|
|
|
|
|
2013-07-20 17:46:00 +00:00
|
|
|
// This tests each Function to determine if it needs upgrading. When we find
|
|
|
|
// one we are interested in, we then upgrade all calls to reflect the new
|
2007-08-04 01:51:18 +00:00
|
|
|
// function.
|
|
|
|
void llvm::UpgradeCallsToIntrinsic(Function* F) {
|
|
|
|
assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
|
|
|
|
|
|
|
|
// Upgrade the function and check if it is a totaly new function.
|
2011-06-18 06:05:24 +00:00
|
|
|
Function *NewFn;
|
2007-12-17 22:33:23 +00:00
|
|
|
if (UpgradeIntrinsicFunction(F, NewFn)) {
|
2007-08-04 01:51:18 +00:00
|
|
|
if (NewFn != F) {
|
|
|
|
// Replace all uses to the old function with the new one if necessary.
|
|
|
|
for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
|
|
|
|
UI != UE; ) {
|
2011-06-18 06:05:24 +00:00
|
|
|
if (CallInst *CI = dyn_cast<CallInst>(*UI++))
|
2007-08-04 01:51:18 +00:00
|
|
|
UpgradeIntrinsicCall(CI, NewFn);
|
|
|
|
}
|
|
|
|
// Remove old function, no longer used, from the module.
|
|
|
|
F->eraseFromParent();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2009-08-28 23:24:31 +00:00
|
|
|
|