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AutoUpgrade.cpp
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//===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the auto-upgrade helper functions.
// This is where deprecated IR intrinsics and other IR features are updated to
// current specifications.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/AutoUpgrade.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/InstVisitor.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/IntrinsicsAArch64.h"
#include "llvm/IR/IntrinsicsARM.h"
#include "llvm/IR/IntrinsicsX86.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Regex.h"
#include <cstring>
using namespace llvm;
static void rename(GlobalValue *GV) { GV->setName(GV->getName() + ".old"); }
// Upgrade the declarations of the SSE4.1 ptest intrinsics whose arguments have
// changed their type from v4f32 to v2i64.
static bool UpgradePTESTIntrinsic(Function* F, Intrinsic::ID IID,
Function *&NewFn) {
// Check whether this is an old version of the function, which received
// v4f32 arguments.
Type *Arg0Type = F->getFunctionType()->getParamType(0);
if (Arg0Type != FixedVectorType::get(Type::getFloatTy(F->getContext()), 4))
return false;
// Yes, it's old, replace it with new version.
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
return true;
}
// Upgrade the declarations of intrinsic functions whose 8-bit immediate mask
// arguments have changed their type from i32 to i8.
static bool UpgradeX86IntrinsicsWith8BitMask(Function *F, Intrinsic::ID IID,
Function *&NewFn) {
// Check that the last argument is an i32.
Type *LastArgType = F->getFunctionType()->getParamType(
F->getFunctionType()->getNumParams() - 1);
if (!LastArgType->isIntegerTy(32))
return false;
// Move this function aside and map down.
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
return true;
}
// Upgrade the declaration of fp compare intrinsics that change return type
// from scalar to vXi1 mask.
static bool UpgradeX86MaskedFPCompare(Function *F, Intrinsic::ID IID,
Function *&NewFn) {
// Check if the return type is a vector.
if (F->getReturnType()->isVectorTy())
return false;
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
return true;
}
static bool ShouldUpgradeX86Intrinsic(Function *F, StringRef Name) {
// All of the intrinsics matches below should be marked with which llvm
// version started autoupgrading them. At some point in the future we would
// like to use this information to remove upgrade code for some older
// intrinsics. It is currently undecided how we will determine that future
// point.
if (Name == "addcarryx.u32" || // Added in 8.0
Name == "addcarryx.u64" || // Added in 8.0
Name == "addcarry.u32" || // Added in 8.0
Name == "addcarry.u64" || // Added in 8.0
Name == "subborrow.u32" || // Added in 8.0
Name == "subborrow.u64" || // Added in 8.0
Name.startswith("sse2.padds.") || // Added in 8.0
Name.startswith("sse2.psubs.") || // Added in 8.0
Name.startswith("sse2.paddus.") || // Added in 8.0
Name.startswith("sse2.psubus.") || // Added in 8.0
Name.startswith("avx2.padds.") || // Added in 8.0
Name.startswith("avx2.psubs.") || // Added in 8.0
Name.startswith("avx2.paddus.") || // Added in 8.0
Name.startswith("avx2.psubus.") || // Added in 8.0
Name.startswith("avx512.padds.") || // Added in 8.0
Name.startswith("avx512.psubs.") || // Added in 8.0
Name.startswith("avx512.mask.padds.") || // Added in 8.0
Name.startswith("avx512.mask.psubs.") || // Added in 8.0
Name.startswith("avx512.mask.paddus.") || // Added in 8.0
Name.startswith("avx512.mask.psubus.") || // Added in 8.0
Name=="ssse3.pabs.b.128" || // Added in 6.0
Name=="ssse3.pabs.w.128" || // Added in 6.0
Name=="ssse3.pabs.d.128" || // Added in 6.0
Name.startswith("fma4.vfmadd.s") || // Added in 7.0
Name.startswith("fma.vfmadd.") || // Added in 7.0
Name.startswith("fma.vfmsub.") || // Added in 7.0
Name.startswith("fma.vfmsubadd.") || // Added in 7.0
Name.startswith("fma.vfnmadd.") || // Added in 7.0
Name.startswith("fma.vfnmsub.") || // Added in 7.0
Name.startswith("avx512.mask.vfmadd.") || // Added in 7.0
Name.startswith("avx512.mask.vfnmadd.") || // Added in 7.0
Name.startswith("avx512.mask.vfnmsub.") || // Added in 7.0
Name.startswith("avx512.mask3.vfmadd.") || // Added in 7.0
Name.startswith("avx512.maskz.vfmadd.") || // Added in 7.0
Name.startswith("avx512.mask3.vfmsub.") || // Added in 7.0
Name.startswith("avx512.mask3.vfnmsub.") || // Added in 7.0
Name.startswith("avx512.mask.vfmaddsub.") || // Added in 7.0
Name.startswith("avx512.maskz.vfmaddsub.") || // Added in 7.0
Name.startswith("avx512.mask3.vfmaddsub.") || // Added in 7.0
Name.startswith("avx512.mask3.vfmsubadd.") || // Added in 7.0
Name.startswith("avx512.mask.shuf.i") || // Added in 6.0
Name.startswith("avx512.mask.shuf.f") || // Added in 6.0
Name.startswith("avx512.kunpck") || //added in 6.0
Name.startswith("avx2.pabs.") || // Added in 6.0
Name.startswith("avx512.mask.pabs.") || // Added in 6.0
Name.startswith("avx512.broadcastm") || // Added in 6.0
Name == "sse.sqrt.ss" || // Added in 7.0
Name == "sse2.sqrt.sd" || // Added in 7.0
Name.startswith("avx512.mask.sqrt.p") || // Added in 7.0
Name.startswith("avx.sqrt.p") || // Added in 7.0
Name.startswith("sse2.sqrt.p") || // Added in 7.0
Name.startswith("sse.sqrt.p") || // Added in 7.0
Name.startswith("avx512.mask.pbroadcast") || // Added in 6.0
Name.startswith("sse2.pcmpeq.") || // Added in 3.1
Name.startswith("sse2.pcmpgt.") || // Added in 3.1
Name.startswith("avx2.pcmpeq.") || // Added in 3.1
Name.startswith("avx2.pcmpgt.") || // Added in 3.1
Name.startswith("avx512.mask.pcmpeq.") || // Added in 3.9
Name.startswith("avx512.mask.pcmpgt.") || // Added in 3.9
Name.startswith("avx.vperm2f128.") || // Added in 6.0
Name == "avx2.vperm2i128" || // Added in 6.0
Name == "sse.add.ss" || // Added in 4.0
Name == "sse2.add.sd" || // Added in 4.0
Name == "sse.sub.ss" || // Added in 4.0
Name == "sse2.sub.sd" || // Added in 4.0
Name == "sse.mul.ss" || // Added in 4.0
Name == "sse2.mul.sd" || // Added in 4.0
Name == "sse.div.ss" || // Added in 4.0
Name == "sse2.div.sd" || // Added in 4.0
Name == "sse41.pmaxsb" || // Added in 3.9
Name == "sse2.pmaxs.w" || // Added in 3.9
Name == "sse41.pmaxsd" || // Added in 3.9
Name == "sse2.pmaxu.b" || // Added in 3.9
Name == "sse41.pmaxuw" || // Added in 3.9
Name == "sse41.pmaxud" || // Added in 3.9
Name == "sse41.pminsb" || // Added in 3.9
Name == "sse2.pmins.w" || // Added in 3.9
Name == "sse41.pminsd" || // Added in 3.9
Name == "sse2.pminu.b" || // Added in 3.9
Name == "sse41.pminuw" || // Added in 3.9
Name == "sse41.pminud" || // Added in 3.9
Name == "avx512.kand.w" || // Added in 7.0
Name == "avx512.kandn.w" || // Added in 7.0
Name == "avx512.knot.w" || // Added in 7.0
Name == "avx512.kor.w" || // Added in 7.0
Name == "avx512.kxor.w" || // Added in 7.0
Name == "avx512.kxnor.w" || // Added in 7.0
Name == "avx512.kortestc.w" || // Added in 7.0
Name == "avx512.kortestz.w" || // Added in 7.0
Name.startswith("avx512.mask.pshuf.b.") || // Added in 4.0
Name.startswith("avx2.pmax") || // Added in 3.9
Name.startswith("avx2.pmin") || // Added in 3.9
Name.startswith("avx512.mask.pmax") || // Added in 4.0
Name.startswith("avx512.mask.pmin") || // Added in 4.0
Name.startswith("avx2.vbroadcast") || // Added in 3.8
Name.startswith("avx2.pbroadcast") || // Added in 3.8
Name.startswith("avx.vpermil.") || // Added in 3.1
Name.startswith("sse2.pshuf") || // Added in 3.9
Name.startswith("avx512.pbroadcast") || // Added in 3.9
Name.startswith("avx512.mask.broadcast.s") || // Added in 3.9
Name.startswith("avx512.mask.movddup") || // Added in 3.9
Name.startswith("avx512.mask.movshdup") || // Added in 3.9
Name.startswith("avx512.mask.movsldup") || // Added in 3.9
Name.startswith("avx512.mask.pshuf.d.") || // Added in 3.9
Name.startswith("avx512.mask.pshufl.w.") || // Added in 3.9
Name.startswith("avx512.mask.pshufh.w.") || // Added in 3.9
Name.startswith("avx512.mask.shuf.p") || // Added in 4.0
Name.startswith("avx512.mask.vpermil.p") || // Added in 3.9
Name.startswith("avx512.mask.perm.df.") || // Added in 3.9
Name.startswith("avx512.mask.perm.di.") || // Added in 3.9
Name.startswith("avx512.mask.punpckl") || // Added in 3.9
Name.startswith("avx512.mask.punpckh") || // Added in 3.9
Name.startswith("avx512.mask.unpckl.") || // Added in 3.9
Name.startswith("avx512.mask.unpckh.") || // Added in 3.9
Name.startswith("avx512.mask.pand.") || // Added in 3.9
Name.startswith("avx512.mask.pandn.") || // Added in 3.9
Name.startswith("avx512.mask.por.") || // Added in 3.9
Name.startswith("avx512.mask.pxor.") || // Added in 3.9
Name.startswith("avx512.mask.and.") || // Added in 3.9
Name.startswith("avx512.mask.andn.") || // Added in 3.9
Name.startswith("avx512.mask.or.") || // Added in 3.9
Name.startswith("avx512.mask.xor.") || // Added in 3.9
Name.startswith("avx512.mask.padd.") || // Added in 4.0
Name.startswith("avx512.mask.psub.") || // Added in 4.0
Name.startswith("avx512.mask.pmull.") || // Added in 4.0
Name.startswith("avx512.mask.cvtdq2pd.") || // Added in 4.0
Name.startswith("avx512.mask.cvtudq2pd.") || // Added in 4.0
Name.startswith("avx512.mask.cvtudq2ps.") || // Added in 7.0 updated 9.0
Name.startswith("avx512.mask.cvtqq2pd.") || // Added in 7.0 updated 9.0
Name.startswith("avx512.mask.cvtuqq2pd.") || // Added in 7.0 updated 9.0
Name.startswith("avx512.mask.cvtdq2ps.") || // Added in 7.0 updated 9.0
Name == "avx512.mask.vcvtph2ps.128" || // Added in 11.0
Name == "avx512.mask.vcvtph2ps.256" || // Added in 11.0
Name == "avx512.mask.cvtqq2ps.256" || // Added in 9.0
Name == "avx512.mask.cvtqq2ps.512" || // Added in 9.0
Name == "avx512.mask.cvtuqq2ps.256" || // Added in 9.0
Name == "avx512.mask.cvtuqq2ps.512" || // Added in 9.0
Name == "avx512.mask.cvtpd2dq.256" || // Added in 7.0
Name == "avx512.mask.cvtpd2ps.256" || // Added in 7.0
Name == "avx512.mask.cvttpd2dq.256" || // Added in 7.0
Name == "avx512.mask.cvttps2dq.128" || // Added in 7.0
Name == "avx512.mask.cvttps2dq.256" || // Added in 7.0
Name == "avx512.mask.cvtps2pd.128" || // Added in 7.0
Name == "avx512.mask.cvtps2pd.256" || // Added in 7.0
Name == "avx512.cvtusi2sd" || // Added in 7.0
Name.startswith("avx512.mask.permvar.") || // Added in 7.0
Name == "sse2.pmulu.dq" || // Added in 7.0
Name == "sse41.pmuldq" || // Added in 7.0
Name == "avx2.pmulu.dq" || // Added in 7.0
Name == "avx2.pmul.dq" || // Added in 7.0
Name == "avx512.pmulu.dq.512" || // Added in 7.0
Name == "avx512.pmul.dq.512" || // Added in 7.0
Name.startswith("avx512.mask.pmul.dq.") || // Added in 4.0
Name.startswith("avx512.mask.pmulu.dq.") || // Added in 4.0
Name.startswith("avx512.mask.pmul.hr.sw.") || // Added in 7.0
Name.startswith("avx512.mask.pmulh.w.") || // Added in 7.0
Name.startswith("avx512.mask.pmulhu.w.") || // Added in 7.0
Name.startswith("avx512.mask.pmaddw.d.") || // Added in 7.0
Name.startswith("avx512.mask.pmaddubs.w.") || // Added in 7.0
Name.startswith("avx512.mask.packsswb.") || // Added in 5.0
Name.startswith("avx512.mask.packssdw.") || // Added in 5.0
Name.startswith("avx512.mask.packuswb.") || // Added in 5.0
Name.startswith("avx512.mask.packusdw.") || // Added in 5.0
Name.startswith("avx512.mask.cmp.b") || // Added in 5.0
Name.startswith("avx512.mask.cmp.d") || // Added in 5.0
Name.startswith("avx512.mask.cmp.q") || // Added in 5.0
Name.startswith("avx512.mask.cmp.w") || // Added in 5.0
Name.startswith("avx512.cmp.p") || // Added in 12.0
Name.startswith("avx512.mask.ucmp.") || // Added in 5.0
Name.startswith("avx512.cvtb2mask.") || // Added in 7.0
Name.startswith("avx512.cvtw2mask.") || // Added in 7.0
Name.startswith("avx512.cvtd2mask.") || // Added in 7.0
Name.startswith("avx512.cvtq2mask.") || // Added in 7.0
Name.startswith("avx512.mask.vpermilvar.") || // Added in 4.0
Name.startswith("avx512.mask.psll.d") || // Added in 4.0
Name.startswith("avx512.mask.psll.q") || // Added in 4.0
Name.startswith("avx512.mask.psll.w") || // Added in 4.0
Name.startswith("avx512.mask.psra.d") || // Added in 4.0
Name.startswith("avx512.mask.psra.q") || // Added in 4.0
Name.startswith("avx512.mask.psra.w") || // Added in 4.0
Name.startswith("avx512.mask.psrl.d") || // Added in 4.0
Name.startswith("avx512.mask.psrl.q") || // Added in 4.0
Name.startswith("avx512.mask.psrl.w") || // Added in 4.0
Name.startswith("avx512.mask.pslli") || // Added in 4.0
Name.startswith("avx512.mask.psrai") || // Added in 4.0
Name.startswith("avx512.mask.psrli") || // Added in 4.0
Name.startswith("avx512.mask.psllv") || // Added in 4.0
Name.startswith("avx512.mask.psrav") || // Added in 4.0
Name.startswith("avx512.mask.psrlv") || // Added in 4.0
Name.startswith("sse41.pmovsx") || // Added in 3.8
Name.startswith("sse41.pmovzx") || // Added in 3.9
Name.startswith("avx2.pmovsx") || // Added in 3.9
Name.startswith("avx2.pmovzx") || // Added in 3.9
Name.startswith("avx512.mask.pmovsx") || // Added in 4.0
Name.startswith("avx512.mask.pmovzx") || // Added in 4.0
Name.startswith("avx512.mask.lzcnt.") || // Added in 5.0
Name.startswith("avx512.mask.pternlog.") || // Added in 7.0
Name.startswith("avx512.maskz.pternlog.") || // Added in 7.0
Name.startswith("avx512.mask.vpmadd52") || // Added in 7.0
Name.startswith("avx512.maskz.vpmadd52") || // Added in 7.0
Name.startswith("avx512.mask.vpermi2var.") || // Added in 7.0
Name.startswith("avx512.mask.vpermt2var.") || // Added in 7.0
Name.startswith("avx512.maskz.vpermt2var.") || // Added in 7.0
Name.startswith("avx512.mask.vpdpbusd.") || // Added in 7.0
Name.startswith("avx512.maskz.vpdpbusd.") || // Added in 7.0
Name.startswith("avx512.mask.vpdpbusds.") || // Added in 7.0
Name.startswith("avx512.maskz.vpdpbusds.") || // Added in 7.0
Name.startswith("avx512.mask.vpdpwssd.") || // Added in 7.0
Name.startswith("avx512.maskz.vpdpwssd.") || // Added in 7.0
Name.startswith("avx512.mask.vpdpwssds.") || // Added in 7.0
Name.startswith("avx512.maskz.vpdpwssds.") || // Added in 7.0
Name.startswith("avx512.mask.dbpsadbw.") || // Added in 7.0
Name.startswith("avx512.mask.vpshld.") || // Added in 7.0
Name.startswith("avx512.mask.vpshrd.") || // Added in 7.0
Name.startswith("avx512.mask.vpshldv.") || // Added in 8.0
Name.startswith("avx512.mask.vpshrdv.") || // Added in 8.0
Name.startswith("avx512.maskz.vpshldv.") || // Added in 8.0
Name.startswith("avx512.maskz.vpshrdv.") || // Added in 8.0
Name.startswith("avx512.vpshld.") || // Added in 8.0
Name.startswith("avx512.vpshrd.") || // Added in 8.0
Name.startswith("avx512.mask.add.p") || // Added in 7.0. 128/256 in 4.0
Name.startswith("avx512.mask.sub.p") || // Added in 7.0. 128/256 in 4.0
Name.startswith("avx512.mask.mul.p") || // Added in 7.0. 128/256 in 4.0
Name.startswith("avx512.mask.div.p") || // Added in 7.0. 128/256 in 4.0
Name.startswith("avx512.mask.max.p") || // Added in 7.0. 128/256 in 5.0
Name.startswith("avx512.mask.min.p") || // Added in 7.0. 128/256 in 5.0
Name.startswith("avx512.mask.fpclass.p") || // Added in 7.0
Name.startswith("avx512.mask.vpshufbitqmb.") || // Added in 8.0
Name.startswith("avx512.mask.pmultishift.qb.") || // Added in 8.0
Name.startswith("avx512.mask.conflict.") || // Added in 9.0
Name == "avx512.mask.pmov.qd.256" || // Added in 9.0
Name == "avx512.mask.pmov.qd.512" || // Added in 9.0
Name == "avx512.mask.pmov.wb.256" || // Added in 9.0
Name == "avx512.mask.pmov.wb.512" || // Added in 9.0
Name == "sse.cvtsi2ss" || // Added in 7.0
Name == "sse.cvtsi642ss" || // Added in 7.0
Name == "sse2.cvtsi2sd" || // Added in 7.0
Name == "sse2.cvtsi642sd" || // Added in 7.0
Name == "sse2.cvtss2sd" || // Added in 7.0
Name == "sse2.cvtdq2pd" || // Added in 3.9
Name == "sse2.cvtdq2ps" || // Added in 7.0
Name == "sse2.cvtps2pd" || // Added in 3.9
Name == "avx.cvtdq2.pd.256" || // Added in 3.9
Name == "avx.cvtdq2.ps.256" || // Added in 7.0
Name == "avx.cvt.ps2.pd.256" || // Added in 3.9
Name.startswith("vcvtph2ps.") || // Added in 11.0
Name.startswith("avx.vinsertf128.") || // Added in 3.7
Name == "avx2.vinserti128" || // Added in 3.7
Name.startswith("avx512.mask.insert") || // Added in 4.0
Name.startswith("avx.vextractf128.") || // Added in 3.7
Name == "avx2.vextracti128" || // Added in 3.7
Name.startswith("avx512.mask.vextract") || // Added in 4.0
Name.startswith("sse4a.movnt.") || // Added in 3.9
Name.startswith("avx.movnt.") || // Added in 3.2
Name.startswith("avx512.storent.") || // Added in 3.9
Name == "sse41.movntdqa" || // Added in 5.0
Name == "avx2.movntdqa" || // Added in 5.0
Name == "avx512.movntdqa" || // Added in 5.0
Name == "sse2.storel.dq" || // Added in 3.9
Name.startswith("sse.storeu.") || // Added in 3.9
Name.startswith("sse2.storeu.") || // Added in 3.9
Name.startswith("avx.storeu.") || // Added in 3.9
Name.startswith("avx512.mask.storeu.") || // Added in 3.9
Name.startswith("avx512.mask.store.p") || // Added in 3.9
Name.startswith("avx512.mask.store.b.") || // Added in 3.9
Name.startswith("avx512.mask.store.w.") || // Added in 3.9
Name.startswith("avx512.mask.store.d.") || // Added in 3.9
Name.startswith("avx512.mask.store.q.") || // Added in 3.9
Name == "avx512.mask.store.ss" || // Added in 7.0
Name.startswith("avx512.mask.loadu.") || // Added in 3.9
Name.startswith("avx512.mask.load.") || // Added in 3.9
Name.startswith("avx512.mask.expand.load.") || // Added in 7.0
Name.startswith("avx512.mask.compress.store.") || // Added in 7.0
Name.startswith("avx512.mask.expand.b") || // Added in 9.0
Name.startswith("avx512.mask.expand.w") || // Added in 9.0
Name.startswith("avx512.mask.expand.d") || // Added in 9.0
Name.startswith("avx512.mask.expand.q") || // Added in 9.0
Name.startswith("avx512.mask.expand.p") || // Added in 9.0
Name.startswith("avx512.mask.compress.b") || // Added in 9.0
Name.startswith("avx512.mask.compress.w") || // Added in 9.0
Name.startswith("avx512.mask.compress.d") || // Added in 9.0
Name.startswith("avx512.mask.compress.q") || // Added in 9.0
Name.startswith("avx512.mask.compress.p") || // Added in 9.0
Name == "sse42.crc32.64.8" || // Added in 3.4
Name.startswith("avx.vbroadcast.s") || // Added in 3.5
Name.startswith("avx512.vbroadcast.s") || // Added in 7.0
Name.startswith("avx512.mask.palignr.") || // Added in 3.9
Name.startswith("avx512.mask.valign.") || // Added in 4.0
Name.startswith("sse2.psll.dq") || // Added in 3.7
Name.startswith("sse2.psrl.dq") || // Added in 3.7
Name.startswith("avx2.psll.dq") || // Added in 3.7
Name.startswith("avx2.psrl.dq") || // Added in 3.7
Name.startswith("avx512.psll.dq") || // Added in 3.9
Name.startswith("avx512.psrl.dq") || // Added in 3.9
Name == "sse41.pblendw" || // Added in 3.7
Name.startswith("sse41.blendp") || // Added in 3.7
Name.startswith("avx.blend.p") || // Added in 3.7
Name == "avx2.pblendw" || // Added in 3.7
Name.startswith("avx2.pblendd.") || // Added in 3.7
Name.startswith("avx.vbroadcastf128") || // Added in 4.0
Name == "avx2.vbroadcasti128" || // Added in 3.7
Name.startswith("avx512.mask.broadcastf32x4.") || // Added in 6.0
Name.startswith("avx512.mask.broadcastf64x2.") || // Added in 6.0
Name.startswith("avx512.mask.broadcastf32x8.") || // Added in 6.0
Name.startswith("avx512.mask.broadcastf64x4.") || // Added in 6.0
Name.startswith("avx512.mask.broadcasti32x4.") || // Added in 6.0
Name.startswith("avx512.mask.broadcasti64x2.") || // Added in 6.0
Name.startswith("avx512.mask.broadcasti32x8.") || // Added in 6.0
Name.startswith("avx512.mask.broadcasti64x4.") || // Added in 6.0
Name == "xop.vpcmov" || // Added in 3.8
Name == "xop.vpcmov.256" || // Added in 5.0
Name.startswith("avx512.mask.move.s") || // Added in 4.0
Name.startswith("avx512.cvtmask2") || // Added in 5.0
Name.startswith("xop.vpcom") || // Added in 3.2, Updated in 9.0
Name.startswith("xop.vprot") || // Added in 8.0
Name.startswith("avx512.prol") || // Added in 8.0
Name.startswith("avx512.pror") || // Added in 8.0
Name.startswith("avx512.mask.prorv.") || // Added in 8.0
Name.startswith("avx512.mask.pror.") || // Added in 8.0
Name.startswith("avx512.mask.prolv.") || // Added in 8.0
Name.startswith("avx512.mask.prol.") || // Added in 8.0
Name.startswith("avx512.ptestm") || //Added in 6.0
Name.startswith("avx512.ptestnm") || //Added in 6.0
Name.startswith("avx512.mask.pavg")) // Added in 6.0
return true;
return false;
}
static bool UpgradeX86IntrinsicFunction(Function *F, StringRef Name,
Function *&NewFn) {
// Only handle intrinsics that start with "x86.".
if (!Name.startswith("x86."))
return false;
// Remove "x86." prefix.
Name = Name.substr(4);
if (ShouldUpgradeX86Intrinsic(F, Name)) {
NewFn = nullptr;
return true;
}
if (Name == "rdtscp") { // Added in 8.0
// If this intrinsic has 0 operands, it's the new version.
if (F->getFunctionType()->getNumParams() == 0)
return false;
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_rdtscp);
return true;
}
// SSE4.1 ptest functions may have an old signature.
if (Name.startswith("sse41.ptest")) { // Added in 3.2
if (Name.substr(11) == "c")
return UpgradePTESTIntrinsic(F, Intrinsic::x86_sse41_ptestc, NewFn);
if (Name.substr(11) == "z")
return UpgradePTESTIntrinsic(F, Intrinsic::x86_sse41_ptestz, NewFn);
if (Name.substr(11) == "nzc")
return UpgradePTESTIntrinsic(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
}
// Several blend and other instructions with masks used the wrong number of
// bits.
if (Name == "sse41.insertps") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_insertps,
NewFn);
if (Name == "sse41.dppd") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dppd,
NewFn);
if (Name == "sse41.dpps") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dpps,
NewFn);
if (Name == "sse41.mpsadbw") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_mpsadbw,
NewFn);
if (Name == "avx.dp.ps.256") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx_dp_ps_256,
NewFn);
if (Name == "avx2.mpsadbw") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx2_mpsadbw,
NewFn);
if (Name == "avx512.mask.cmp.pd.128") // Added in 7.0
return UpgradeX86MaskedFPCompare(F, Intrinsic::x86_avx512_mask_cmp_pd_128,
NewFn);
if (Name == "avx512.mask.cmp.pd.256") // Added in 7.0
return UpgradeX86MaskedFPCompare(F, Intrinsic::x86_avx512_mask_cmp_pd_256,
NewFn);
if (Name == "avx512.mask.cmp.pd.512") // Added in 7.0
return UpgradeX86MaskedFPCompare(F, Intrinsic::x86_avx512_mask_cmp_pd_512,
NewFn);
if (Name == "avx512.mask.cmp.ps.128") // Added in 7.0
return UpgradeX86MaskedFPCompare(F, Intrinsic::x86_avx512_mask_cmp_ps_128,
NewFn);
if (Name == "avx512.mask.cmp.ps.256") // Added in 7.0
return UpgradeX86MaskedFPCompare(F, Intrinsic::x86_avx512_mask_cmp_ps_256,
NewFn);
if (Name == "avx512.mask.cmp.ps.512") // Added in 7.0
return UpgradeX86MaskedFPCompare(F, Intrinsic::x86_avx512_mask_cmp_ps_512,
NewFn);
// frcz.ss/sd may need to have an argument dropped. Added in 3.2
if (Name.startswith("xop.vfrcz.ss") && F->arg_size() == 2) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_xop_vfrcz_ss);
return true;
}
if (Name.startswith("xop.vfrcz.sd") && F->arg_size() == 2) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_xop_vfrcz_sd);
return true;
}
// Upgrade any XOP PERMIL2 index operand still using a float/double vector.
if (Name.startswith("xop.vpermil2")) { // Added in 3.9
auto Idx = F->getFunctionType()->getParamType(2);
if (Idx->isFPOrFPVectorTy()) {
rename(F);
unsigned IdxSize = Idx->getPrimitiveSizeInBits();
unsigned EltSize = Idx->getScalarSizeInBits();
Intrinsic::ID Permil2ID;
if (EltSize == 64 && IdxSize == 128)
Permil2ID = Intrinsic::x86_xop_vpermil2pd;
else if (EltSize == 32 && IdxSize == 128)
Permil2ID = Intrinsic::x86_xop_vpermil2ps;
else if (EltSize == 64 && IdxSize == 256)
Permil2ID = Intrinsic::x86_xop_vpermil2pd_256;
else
Permil2ID = Intrinsic::x86_xop_vpermil2ps_256;
NewFn = Intrinsic::getDeclaration(F->getParent(), Permil2ID);
return true;
}
}
if (Name == "seh.recoverfp") {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::eh_recoverfp);
return true;
}
return false;
}
static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
assert(F && "Illegal to upgrade a non-existent Function.");
// Quickly eliminate it, if it's not a candidate.
StringRef Name = F->getName();
if (Name.size() <= 8 || !Name.startswith("llvm."))
return false;
Name = Name.substr(5); // Strip off "llvm."
switch (Name[0]) {
default: break;
case 'a': {
if (Name.startswith("arm.rbit") || Name.startswith("aarch64.rbit")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::bitreverse,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("arm.neon.vclz")) {
Type* args[2] = {
F->arg_begin()->getType(),
Type::getInt1Ty(F->getContext())
};
// Can't use Intrinsic::getDeclaration here as it adds a ".i1" to
// the end of the name. Change name from llvm.arm.neon.vclz.* to
// llvm.ctlz.*
FunctionType* fType = FunctionType::get(F->getReturnType(), args, false);
NewFn = Function::Create(fType, F->getLinkage(), F->getAddressSpace(),
"llvm.ctlz." + Name.substr(14), F->getParent());
return true;
}
if (Name.startswith("arm.neon.vcnt")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctpop,
F->arg_begin()->getType());
return true;
}
static const Regex vldRegex("^arm\\.neon\\.vld([1234]|[234]lane)\\.v[a-z0-9]*$");
if (vldRegex.match(Name)) {
auto fArgs = F->getFunctionType()->params();
SmallVector<Type *, 4> Tys(fArgs.begin(), fArgs.end());
// Can't use Intrinsic::getDeclaration here as the return types might
// then only be structurally equal.
FunctionType* fType = FunctionType::get(F->getReturnType(), Tys, false);
NewFn = Function::Create(fType, F->getLinkage(), F->getAddressSpace(),
"llvm." + Name + ".p0i8", F->getParent());
return true;
}
static const Regex vstRegex("^arm\\.neon\\.vst([1234]|[234]lane)\\.v[a-z0-9]*$");
if (vstRegex.match(Name)) {
static const Intrinsic::ID StoreInts[] = {Intrinsic::arm_neon_vst1,
Intrinsic::arm_neon_vst2,
Intrinsic::arm_neon_vst3,
Intrinsic::arm_neon_vst4};
static const Intrinsic::ID StoreLaneInts[] = {
Intrinsic::arm_neon_vst2lane, Intrinsic::arm_neon_vst3lane,
Intrinsic::arm_neon_vst4lane
};
auto fArgs = F->getFunctionType()->params();
Type *Tys[] = {fArgs[0], fArgs[1]};
if (Name.find("lane") == StringRef::npos)
NewFn = Intrinsic::getDeclaration(F->getParent(),
StoreInts[fArgs.size() - 3], Tys);
else
NewFn = Intrinsic::getDeclaration(F->getParent(),
StoreLaneInts[fArgs.size() - 5], Tys);
return true;
}
if (Name == "aarch64.thread.pointer" || Name == "arm.thread.pointer") {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::thread_pointer);
return true;
}
if (Name.startswith("arm.neon.vqadds.")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::sadd_sat,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("arm.neon.vqaddu.")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::uadd_sat,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("arm.neon.vqsubs.")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ssub_sat,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("arm.neon.vqsubu.")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::usub_sat,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("aarch64.neon.addp")) {
if (F->arg_size() != 2)
break; // Invalid IR.
VectorType *Ty = dyn_cast<VectorType>(F->getReturnType());
if (Ty && Ty->getElementType()->isFloatingPointTy()) {
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::aarch64_neon_faddp, Ty);
return true;
}
}
// Changed in 12.0: bfdot accept v4bf16 and v8bf16 instead of v8i8 and v16i8
// respectively
if ((Name.startswith("arm.neon.bfdot.") ||
Name.startswith("aarch64.neon.bfdot.")) &&
Name.endswith("i8")) {
Intrinsic::ID IID =
StringSwitch<Intrinsic::ID>(Name)
.Cases("arm.neon.bfdot.v2f32.v8i8",
"arm.neon.bfdot.v4f32.v16i8",
Intrinsic::arm_neon_bfdot)
.Cases("aarch64.neon.bfdot.v2f32.v8i8",
"aarch64.neon.bfdot.v4f32.v16i8",
Intrinsic::aarch64_neon_bfdot)
.Default(Intrinsic::not_intrinsic);
if (IID == Intrinsic::not_intrinsic)
break;
size_t OperandWidth = F->getReturnType()->getPrimitiveSizeInBits();
assert((OperandWidth == 64 || OperandWidth == 128) &&
"Unexpected operand width");
LLVMContext &Ctx = F->getParent()->getContext();
std::array<Type *, 2> Tys {{
F->getReturnType(),
FixedVectorType::get(Type::getBFloatTy(Ctx), OperandWidth / 16)
}};
NewFn = Intrinsic::getDeclaration(F->getParent(), IID, Tys);
return true;
}
// Changed in 12.0: bfmmla, bfmlalb and bfmlalt are not polymorphic anymore
// and accept v8bf16 instead of v16i8
if ((Name.startswith("arm.neon.bfm") ||
Name.startswith("aarch64.neon.bfm")) &&
Name.endswith(".v4f32.v16i8")) {
Intrinsic::ID IID =
StringSwitch<Intrinsic::ID>(Name)
.Case("arm.neon.bfmmla.v4f32.v16i8",
Intrinsic::arm_neon_bfmmla)
.Case("arm.neon.bfmlalb.v4f32.v16i8",
Intrinsic::arm_neon_bfmlalb)
.Case("arm.neon.bfmlalt.v4f32.v16i8",
Intrinsic::arm_neon_bfmlalt)
.Case("aarch64.neon.bfmmla.v4f32.v16i8",
Intrinsic::aarch64_neon_bfmmla)
.Case("aarch64.neon.bfmlalb.v4f32.v16i8",
Intrinsic::aarch64_neon_bfmlalb)
.Case("aarch64.neon.bfmlalt.v4f32.v16i8",
Intrinsic::aarch64_neon_bfmlalt)
.Default(Intrinsic::not_intrinsic);
if (IID == Intrinsic::not_intrinsic)
break;
std::array<Type *, 0> Tys;
NewFn = Intrinsic::getDeclaration(F->getParent(), IID, Tys);
return true;
}
break;
}
case 'c': {
if (Name.startswith("ctlz.") && F->arg_size() == 1) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("cttz.") && F->arg_size() == 1) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
F->arg_begin()->getType());
return true;
}
break;
}
case 'd': {
if (Name == "dbg.value" && F->arg_size() == 4) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::dbg_value);
return true;
}
break;
}
case 'e': {
SmallVector<StringRef, 2> Groups;
static const Regex R("^experimental.vector.reduce.([a-z]+)\\.[a-z][0-9]+");
if (R.match(Name, &Groups)) {
Intrinsic::ID ID;
ID = StringSwitch<Intrinsic::ID>(Groups[1])
.Case("add", Intrinsic::vector_reduce_add)
.Case("mul", Intrinsic::vector_reduce_mul)
.Case("and", Intrinsic::vector_reduce_and)
.Case("or", Intrinsic::vector_reduce_or)
.Case("xor", Intrinsic::vector_reduce_xor)
.Case("smax", Intrinsic::vector_reduce_smax)
.Case("smin", Intrinsic::vector_reduce_smin)
.Case("umax", Intrinsic::vector_reduce_umax)
.Case("umin", Intrinsic::vector_reduce_umin)
.Case("fmax", Intrinsic::vector_reduce_fmax)
.Case("fmin", Intrinsic::vector_reduce_fmin)
.Default(Intrinsic::not_intrinsic);
if (ID != Intrinsic::not_intrinsic) {
rename(F);
auto Args = F->getFunctionType()->params();
NewFn = Intrinsic::getDeclaration(F->getParent(), ID, {Args[0]});
return true;
}
}
static const Regex R2(
"^experimental.vector.reduce.v2.([a-z]+)\\.[fi][0-9]+");
Groups.clear();
if (R2.match(Name, &Groups)) {
Intrinsic::ID ID = Intrinsic::not_intrinsic;
if (Groups[1] == "fadd")
ID = Intrinsic::vector_reduce_fadd;
if (Groups[1] == "fmul")
ID = Intrinsic::vector_reduce_fmul;
if (ID != Intrinsic::not_intrinsic) {
rename(F);
auto Args = F->getFunctionType()->params();
Type *Tys[] = {Args[1]};
NewFn = Intrinsic::getDeclaration(F->getParent(), ID, Tys);
return true;
}
}
break;
}
case 'i':
case 'l': {
bool IsLifetimeStart = Name.startswith("lifetime.start");
if (IsLifetimeStart || Name.startswith("invariant.start")) {
Intrinsic::ID ID = IsLifetimeStart ?
Intrinsic::lifetime_start : Intrinsic::invariant_start;
auto Args = F->getFunctionType()->params();
Type* ObjectPtr[1] = {Args[1]};
if (F->getName() != Intrinsic::getName(ID, ObjectPtr)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), ID, ObjectPtr);
return true;
}
}
bool IsLifetimeEnd = Name.startswith("lifetime.end");
if (IsLifetimeEnd || Name.startswith("invariant.end")) {
Intrinsic::ID ID = IsLifetimeEnd ?
Intrinsic::lifetime_end : Intrinsic::invariant_end;
auto Args = F->getFunctionType()->params();
Type* ObjectPtr[1] = {Args[IsLifetimeEnd ? 1 : 2]};
if (F->getName() != Intrinsic::getName(ID, ObjectPtr)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), ID, ObjectPtr);
return true;
}
}
if (Name.startswith("invariant.group.barrier")) {
// Rename invariant.group.barrier to launder.invariant.group
auto Args = F->getFunctionType()->params();
Type* ObjectPtr[1] = {Args[0]};
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::launder_invariant_group, ObjectPtr);
return true;
}
break;
}
case 'm': {
if (Name.startswith("masked.load.")) {
Type *Tys[] = { F->getReturnType(), F->arg_begin()->getType() };
if (F->getName() != Intrinsic::getName(Intrinsic::masked_load, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::masked_load,
Tys);
return true;
}
}
if (Name.startswith("masked.store.")) {
auto Args = F->getFunctionType()->params();
Type *Tys[] = { Args[0], Args[1] };
if (F->getName() != Intrinsic::getName(Intrinsic::masked_store, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::masked_store,
Tys);
return true;
}
}
// Renaming gather/scatter intrinsics with no address space overloading
// to the new overload which includes an address space
if (Name.startswith("masked.gather.")) {
Type *Tys[] = {F->getReturnType(), F->arg_begin()->getType()};
if (F->getName() != Intrinsic::getName(Intrinsic::masked_gather, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::masked_gather, Tys);
return true;
}
}
if (Name.startswith("masked.scatter.")) {
auto Args = F->getFunctionType()->params();
Type *Tys[] = {Args[0], Args[1]};
if (F->getName() != Intrinsic::getName(Intrinsic::masked_scatter, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::masked_scatter, Tys);
return true;
}
}
// Updating the memory intrinsics (memcpy/memmove/memset) that have an
// alignment parameter to embedding the alignment as an attribute of
// the pointer args.
if (Name.startswith("memcpy.") && F->arg_size() == 5) {
rename(F);
// Get the types of dest, src, and len
ArrayRef<Type *> ParamTypes = F->getFunctionType()->params().slice(0, 3);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::memcpy,
ParamTypes);
return true;
}
if (Name.startswith("memmove.") && F->arg_size() == 5) {
rename(F);
// Get the types of dest, src, and len
ArrayRef<Type *> ParamTypes = F->getFunctionType()->params().slice(0, 3);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::memmove,
ParamTypes);
return true;
}
if (Name.startswith("memset.") && F->arg_size() == 5) {
rename(F);
// Get the types of dest, and len
const auto *FT = F->getFunctionType();
Type *ParamTypes[2] = {
FT->getParamType(0), // Dest
FT->getParamType(2) // len
};
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::memset,
ParamTypes);
return true;
}
break;
}
case 'n': {
if (Name.startswith("nvvm.")) {
Name = Name.substr(5);
// The following nvvm intrinsics correspond exactly to an LLVM intrinsic.
Intrinsic::ID IID = StringSwitch<Intrinsic::ID>(Name)
.Cases("brev32", "brev64", Intrinsic::bitreverse)
.Case("clz.i", Intrinsic::ctlz)
.Case("popc.i", Intrinsic::ctpop)
.Default(Intrinsic::not_intrinsic);
if (IID != Intrinsic::not_intrinsic && F->arg_size() == 1) {
NewFn = Intrinsic::getDeclaration(F->getParent(), IID,
{F->getReturnType()});
return true;
}
// The following nvvm intrinsics correspond exactly to an LLVM idiom, but
// not to an intrinsic alone. We expand them in UpgradeIntrinsicCall.
//
// TODO: We could add lohi.i2d.
bool Expand = StringSwitch<bool>(Name)
.Cases("abs.i", "abs.ll", true)
.Cases("clz.ll", "popc.ll", "h2f", true)
.Cases("max.i", "max.ll", "max.ui", "max.ull", true)
.Cases("min.i", "min.ll", "min.ui", "min.ull", true)
.StartsWith("atomic.load.add.f32.p", true)
.StartsWith("atomic.load.add.f64.p", true)
.Default(false);
if (Expand) {
NewFn = nullptr;
return true;
}
}
break;
}
case 'o':
// We only need to change the name to match the mangling including the
// address space.
if (Name.startswith("objectsize.")) {
Type *Tys[2] = { F->getReturnType(), F->arg_begin()->getType() };
if (F->arg_size() == 2 || F->arg_size() == 3 ||
F->getName() != Intrinsic::getName(Intrinsic::objectsize, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::objectsize,
Tys);
return true;
}
}
break;
case 'p':
if (Name == "prefetch") {
// Handle address space overloading.
Type *Tys[] = {F->arg_begin()->getType()};
if (F->getName() != Intrinsic::getName(Intrinsic::prefetch, Tys)) {
rename(F);
NewFn =
Intrinsic::getDeclaration(F->getParent(), Intrinsic::prefetch, Tys);
return true;
}
}
break;
case 's':
if (Name == "stackprotectorcheck") {
NewFn = nullptr;
return true;
}
break;
case 'x':
if (UpgradeX86IntrinsicFunction(F, Name, NewFn))
return true;
}
// Remangle our intrinsic since we upgrade the mangling
auto Result = llvm::Intrinsic::remangleIntrinsicFunction(F);
if (Result != None) {
NewFn = Result.getValue();
return true;
}
// This may not belong here. This function is effectively being overloaded
// to both detect an intrinsic which needs upgrading, and to provide the
// upgraded form of the intrinsic. We should perhaps have two separate
// functions for this.
return false;
}
bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
NewFn = nullptr;
bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
assert(F != NewFn && "Intrinsic function upgraded to the same function");
// Upgrade intrinsic attributes. This does not change the function.
if (NewFn)
F = NewFn;
if (Intrinsic::ID id = F->getIntrinsicID())
F->setAttributes(Intrinsic::getAttributes(F->getContext(), id));
return Upgraded;
}
GlobalVariable *llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
if (!(GV->hasName() && (GV->getName() == "llvm.global_ctors" ||
GV->getName() == "llvm.global_dtors")) ||
!GV->hasInitializer())
return nullptr;
ArrayType *ATy = dyn_cast<ArrayType>(GV->getValueType());
if (!ATy)
return nullptr;
StructType *STy = dyn_cast<StructType>(ATy->getElementType());
if (!STy || STy->getNumElements() != 2)
return nullptr;
LLVMContext &C = GV->getContext();
IRBuilder<> IRB(C);
auto EltTy = StructType::get(STy->getElementType(0), STy->getElementType(1),
IRB.getInt8PtrTy());
Constant *Init = GV->getInitializer();
unsigned N = Init->getNumOperands();
std::vector<Constant *> NewCtors(N);
for (unsigned i = 0; i != N; ++i) {