RPCS3/llvm
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm.git synced 2024-12-24 13:06:56 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
c2320545bc
llvm/lib/IR/AutoUpgrade.cpp
Adrian Prantl 02474a32eb Move the complex address expression out of DIVariable and into an extra 
argument of the llvm.dbg.declare/llvm.dbg.value intrinsics.

Previously, DIVariable was a variable-length field that has an optional
reference to a Metadata array consisting of a variable number of
complex address expressions. In the case of OpPiece expressions this is
wasting a lot of storage in IR, because when an aggregate type is, e.g.,
SROA'd into all of its n individual members, the IR will contain n copies
of the DIVariable, all alike, only differing in the complex address
reference at the end.

By making the complex address into an extra argument of the
dbg.value/dbg.declare intrinsics, all of the pieces can reference the
same variable and the complex address expressions can be uniqued across
the CU, too.
Down the road, this will allow us to move other flags, such as
"indirection" out of the DIVariable, too.

The new intrinsics look like this:
declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr)
declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr)

This patch adds a new LLVM-local tag to DIExpressions, so we can detect
and pretty-print DIExpression metadata nodes.

What this patch doesn't do:

This patch does not touch the "Indirect" field in DIVariable; but moving
that into the expression would be a natural next step.

http://reviews.llvm.org/D4919
rdar://problem/17994491

Thanks to dblaikie and dexonsmith for reviewing this patch!

Note: I accidentally committed a bogus older version of this patch previously.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218787 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-01 18:55:02 +00:00

674 lines
25 KiB
C++
Raw Blame History

//===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the auto-upgrade helper functions
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/AutoUpgrade.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstring>
using namespace llvm;
// Upgrade the declarations of the SSE4.1 functions whose arguments have
// changed their type from v4f32 to v2i64.
static bool UpgradeSSE41Function(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 != VectorType::get(Type::getFloatTy(F->getContext()), 4))
return false;
// Yes, it's old, replace it with new version.
F->setName(F->getName() + ".old");
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.
F->setName(F->getName() + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
return true;
}
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.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(),
"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;
}
break;
}
case 'c': {
if (Name.startswith("ctlz.") && F->arg_size() == 1) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("cttz.") && F->arg_size() == 1) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
F->arg_begin()->getType());
return true;
}
break;
}
case 'd': {
if (Name.startswith("dbg.declare") && F->arg_size() == 2) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::dbg_declare);
return true;
}
if (Name.startswith("dbg.value") && F->arg_size() == 3) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::dbg_value);
return true;
}
break;
}
case 'o':
// We only need to change the name to match the mangling including the
// address space.
if (F->arg_size() == 2 && Name.startswith("objectsize.")) {
Type *Tys[2] = { F->getReturnType(), F->arg_begin()->getType() };
if (F->getName() != Intrinsic::getName(Intrinsic::objectsize, Tys)) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::objectsize, Tys);
return true;
}
}
break;
case 'x': {
if (Name.startswith("x86.sse2.pcmpeq.") ||
Name.startswith("x86.sse2.pcmpgt.") ||
Name.startswith("x86.avx2.pcmpeq.") ||
Name.startswith("x86.avx2.pcmpgt.") ||
Name.startswith("x86.avx.vpermil.") ||
Name == "x86.avx.movnt.dq.256" ||
Name == "x86.avx.movnt.pd.256" ||
Name == "x86.avx.movnt.ps.256" ||
Name == "x86.sse42.crc32.64.8" ||
Name == "x86.avx.vbroadcast.ss" ||
Name == "x86.avx.vbroadcast.ss.256" ||
Name == "x86.avx.vbroadcast.sd.256" ||
(Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
NewFn = nullptr;
return true;
}
// SSE4.1 ptest functions may have an old signature.
if (Name.startswith("x86.sse41.ptest")) {
if (Name == "x86.sse41.ptestc")
return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestc, NewFn);
if (Name == "x86.sse41.ptestz")
return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestz, NewFn);
if (Name == "x86.sse41.ptestnzc")
return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
}
// Several blend and other instructions with maskes used the wrong number of
// bits.
if (Name == "x86.sse41.pblendw")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_pblendw,
NewFn);
if (Name == "x86.sse41.blendpd")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_blendpd,
NewFn);
if (Name == "x86.sse41.blendps")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_blendps,
NewFn);
if (Name == "x86.sse41.insertps")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_insertps,
NewFn);
if (Name == "x86.sse41.dppd")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dppd,
NewFn);
if (Name == "x86.sse41.dpps")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dpps,
NewFn);
if (Name == "x86.sse41.mpsadbw")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_mpsadbw,
NewFn);
if (Name == "x86.avx.blend.pd.256")
return UpgradeX86IntrinsicsWith8BitMask(
F, Intrinsic::x86_avx_blend_pd_256, NewFn);
if (Name == "x86.avx.blend.ps.256")
return UpgradeX86IntrinsicsWith8BitMask(
F, Intrinsic::x86_avx_blend_ps_256, NewFn);
if (Name == "x86.avx.dp.ps.256")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx_dp_ps_256,
NewFn);
if (Name == "x86.avx2.pblendw")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx2_pblendw,
NewFn);
if (Name == "x86.avx2.pblendd.128")
return UpgradeX86IntrinsicsWith8BitMask(
F, Intrinsic::x86_avx2_pblendd_128, NewFn);
if (Name == "x86.avx2.pblendd.256")
return UpgradeX86IntrinsicsWith8BitMask(
F, Intrinsic::x86_avx2_pblendd_256, NewFn);
if (Name == "x86.avx2.mpsadbw")
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx2_mpsadbw,
NewFn);
// frcz.ss/sd may need to have an argument dropped
if (Name.startswith("x86.xop.vfrcz.ss") && F->arg_size() == 2) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_xop_vfrcz_ss);
return true;
}
if (Name.startswith("x86.xop.vfrcz.sd") && F->arg_size() == 2) {
F->setName(Name + ".old");
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_xop_vfrcz_sd);
return true;
}
// Fix the FMA4 intrinsics to remove the 4
if (Name.startswith("x86.fma4.")) {
F->setName("llvm.x86.fma" + Name.substr(8));
NewFn = F;
return true;
}
break;
}
}
// This may not belong here. This function is effectively being overloaded
// to both detect an intrinsic which needs upgrading, and to provide the
// upgraded 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);
// Upgrade intrinsic attributes. This does not change the function.
if (NewFn)
F = NewFn;
if (unsigned id = F->getIntrinsicID())
F->setAttributes(Intrinsic::getAttributes(F->getContext(),
(Intrinsic::ID)id));
return Upgraded;
}
bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
// Nothing to do yet.
return false;
}
static MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
if (!DbgNode || Elt >= DbgNode->getNumOperands())
return nullptr;
return dyn_cast_or_null<MDNode>(DbgNode->getOperand(Elt));
}
static DIExpression getExpression(Value *VarOperand, Function *F) {
// Old-style DIVariables have an optional expression as the 8th element.
DIExpression Expr(getNodeField(cast<MDNode>(VarOperand), 8));
if (!Expr) {
DIBuilder DIB(*F->getParent());
Expr = DIB.createExpression();
}
return Expr;
}
// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
// upgraded intrinsic. All argument and return casting must be provided in
// order to seamlessly integrate with existing context.
void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
Function *F = CI->getCalledFunction();
LLVMContext &C = CI->getContext();
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
assert(F && "Intrinsic call is not direct?");
if (!NewFn) {
// Get the Function's name.
StringRef Name = F->getName();
Value *Rep;
// Upgrade packed integer vector compares intrinsics to compare instructions
if (Name.startswith("llvm.x86.sse2.pcmpeq.") ||
Name.startswith("llvm.x86.avx2.pcmpeq.")) {
Rep = Builder.CreateICmpEQ(CI->getArgOperand(0), CI->getArgOperand(1),
"pcmpeq");
// need to sign extend since icmp returns vector of i1
Rep = Builder.CreateSExt(Rep, CI->getType(), "");
} else if (Name.startswith("llvm.x86.sse2.pcmpgt.") ||
Name.startswith("llvm.x86.avx2.pcmpgt.")) {
Rep = Builder.CreateICmpSGT(CI->getArgOperand(0), CI->getArgOperand(1),
"pcmpgt");
// need to sign extend since icmp returns vector of i1
Rep = Builder.CreateSExt(Rep, CI->getType(), "");
} else if (Name == "llvm.x86.avx.movnt.dq.256" ||
Name == "llvm.x86.avx.movnt.ps.256" ||
Name == "llvm.x86.avx.movnt.pd.256") {
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
Module *M = F->getParent();
SmallVector<Value *, 1> Elts;
Elts.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
MDNode *Node = MDNode::get(C, Elts);
Value *Arg0 = CI->getArgOperand(0);
Value *Arg1 = CI->getArgOperand(1);
// Convert the type of the pointer to a pointer to the stored type.
Value *BC = Builder.CreateBitCast(Arg0,
PointerType::getUnqual(Arg1->getType()),
"cast");
StoreInst *SI = Builder.CreateStore(Arg1, BC);
SI->setMetadata(M->getMDKindID("nontemporal"), Node);
SI->setAlignment(16);
// Remove intrinsic.
CI->eraseFromParent();
return;
} else if (Name.startswith("llvm.x86.xop.vpcom")) {
Intrinsic::ID intID;
if (Name.endswith("ub"))
intID = Intrinsic::x86_xop_vpcomub;
else if (Name.endswith("uw"))
intID = Intrinsic::x86_xop_vpcomuw;
else if (Name.endswith("ud"))
intID = Intrinsic::x86_xop_vpcomud;
else if (Name.endswith("uq"))
intID = Intrinsic::x86_xop_vpcomuq;
else if (Name.endswith("b"))
intID = Intrinsic::x86_xop_vpcomb;
else if (Name.endswith("w"))
intID = Intrinsic::x86_xop_vpcomw;
else if (Name.endswith("d"))
intID = Intrinsic::x86_xop_vpcomd;
else if (Name.endswith("q"))
intID = Intrinsic::x86_xop_vpcomq;
else
llvm_unreachable("Unknown suffix");
Name = Name.substr(18); // strip off "llvm.x86.xop.vpcom"
unsigned Imm;
if (Name.startswith("lt"))
Imm = 0;
else if (Name.startswith("le"))
Imm = 1;
else if (Name.startswith("gt"))
Imm = 2;
else if (Name.startswith("ge"))
Imm = 3;
else if (Name.startswith("eq"))
Imm = 4;
else if (Name.startswith("ne"))
Imm = 5;
else if (Name.startswith("true"))
Imm = 6;
else if (Name.startswith("false"))
Imm = 7;
else
llvm_unreachable("Unknown condition");
Function *VPCOM = Intrinsic::getDeclaration(F->getParent(), intID);
Rep = Builder.CreateCall3(VPCOM, CI->getArgOperand(0),
CI->getArgOperand(1), Builder.getInt8(Imm));
} else if (Name == "llvm.x86.sse42.crc32.64.8") {
Function *CRC32 = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_sse42_crc32_32_8);
Value *Trunc0 = Builder.CreateTrunc(CI->getArgOperand(0), Type::getInt32Ty(C));
Rep = Builder.CreateCall2(CRC32, Trunc0, CI->getArgOperand(1));
Rep = Builder.CreateZExt(Rep, CI->getType(), "");
} else if (Name.startswith("llvm.x86.avx.vbroadcast")) {
// Replace broadcasts with a series of insertelements.
Type *VecTy = CI->getType();
Type *EltTy = VecTy->getVectorElementType();
unsigned EltNum = VecTy->getVectorNumElements();
Value *Cast = Builder.CreateBitCast(CI->getArgOperand(0),
EltTy->getPointerTo());
Value *Load = Builder.CreateLoad(Cast);
Type *I32Ty = Type::getInt32Ty(C);
Rep = UndefValue::get(VecTy);
for (unsigned I = 0; I < EltNum; ++I)
Rep = Builder.CreateInsertElement(Rep, Load,
ConstantInt::get(I32Ty, I));
} else {
bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
if (Name == "llvm.x86.avx.vpermil.pd.256")
PD256 = true;
else if (Name == "llvm.x86.avx.vpermil.pd")
PD128 = true;
else if (Name == "llvm.x86.avx.vpermil.ps.256")
PS256 = true;
else if (Name == "llvm.x86.avx.vpermil.ps")
PS128 = true;
if (PD256 || PD128 || PS256 || PS128) {
Value *Op0 = CI->getArgOperand(0);
unsigned Imm = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
SmallVector<Constant*, 8> Idxs;
if (PD128)
for (unsigned i = 0; i != 2; ++i)
Idxs.push_back(Builder.getInt32((Imm >> i) & 0x1));
else if (PD256)
for (unsigned l = 0; l != 4; l+=2)
for (unsigned i = 0; i != 2; ++i)
Idxs.push_back(Builder.getInt32(((Imm >> (l+i)) & 0x1) + l));
else if (PS128)
for (unsigned i = 0; i != 4; ++i)
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.");
}
}
CI->replaceAllUsesWith(Rep);
CI->eraseFromParent();
return;
}
std::string Name = CI->getName().str();
if (!Name.empty())
CI->setName(Name + ".old");
switch (NewFn->getIntrinsicID()) {
default:
llvm_unreachable("Unknown function for CallInst upgrade.");
// Upgrade debug intrinsics to use an additional DIExpression argument.
case Intrinsic::dbg_declare: {
auto NewCI =
Builder.CreateCall3(NewFn, CI->getArgOperand(0), CI->getArgOperand(1),
getExpression(CI->getArgOperand(1), F), Name);
NewCI->setDebugLoc(CI->getDebugLoc());
CI->replaceAllUsesWith(NewCI);
CI->eraseFromParent();
return;
}
case Intrinsic::dbg_value: {
auto NewCI = Builder.CreateCall4(
NewFn, CI->getArgOperand(0), CI->getArgOperand(1), CI->getArgOperand(2),
getExpression(CI->getArgOperand(2), F), Name);
NewCI->setDebugLoc(CI->getDebugLoc());
CI->replaceAllUsesWith(NewCI);
CI->eraseFromParent();
return;
}
case Intrinsic::ctlz:
case Intrinsic::cttz:
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;
case Intrinsic::objectsize:
CI->replaceAllUsesWith(Builder.CreateCall2(NewFn,
CI->getArgOperand(0),
CI->getArgOperand(1),
Name));
CI->eraseFromParent();
return;
case Intrinsic::arm_neon_vclz: {
// Change name from llvm.arm.neon.vclz.* to llvm.ctlz.*
CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
Builder.getFalse(),
"llvm.ctlz." + Name.substr(14)));
CI->eraseFromParent();
return;
}
case Intrinsic::ctpop: {
CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(0)));
CI->eraseFromParent();
return;
}
case Intrinsic::x86_xop_vfrcz_ss:
case Intrinsic::x86_xop_vfrcz_sd:
CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(1),
Name));
CI->eraseFromParent();
return;
case Intrinsic::x86_sse41_ptestc:
case Intrinsic::x86_sse41_ptestz:
case Intrinsic::x86_sse41_ptestnzc: {
// 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;
}
case Intrinsic::x86_sse41_pblendw:
case Intrinsic::x86_sse41_blendpd:
case Intrinsic::x86_sse41_blendps:
case Intrinsic::x86_sse41_insertps:
case Intrinsic::x86_sse41_dppd:
case Intrinsic::x86_sse41_dpps:
case Intrinsic::x86_sse41_mpsadbw:
case Intrinsic::x86_avx_blend_pd_256:
case Intrinsic::x86_avx_blend_ps_256:
case Intrinsic::x86_avx_dp_ps_256:
case Intrinsic::x86_avx2_pblendw:
case Intrinsic::x86_avx2_pblendd_128:
case Intrinsic::x86_avx2_pblendd_256:
case Intrinsic::x86_avx2_mpsadbw: {
// Need to truncate the last argument from i32 to i8 -- this argument models
// an inherently 8-bit immediate operand to these x86 instructions.
SmallVector<Value *, 4> Args(CI->arg_operands().begin(),
CI->arg_operands().end());
// Replace the last argument with a trunc.
Args.back() = Builder.CreateTrunc(Args.back(), Type::getInt8Ty(C), "trunc");
CallInst *NewCall = Builder.CreateCall(NewFn, Args);
CI->replaceAllUsesWith(NewCall);
CI->eraseFromParent();
return;
}
}
}
// 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
// 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.
Function *NewFn;
if (UpgradeIntrinsicFunction(F, NewFn)) {
if (NewFn != F) {
// Replace all uses to the old function with the new one if necessary.
for (Value::user_iterator UI = F->user_begin(), UE = F->user_end();
UI != UE; ) {
if (CallInst *CI = dyn_cast<CallInst>(*UI++))
UpgradeIntrinsicCall(CI, NewFn);
}
// Remove old function, no longer used, from the module.
F->eraseFromParent();
}
}
}
void llvm::UpgradeInstWithTBAATag(Instruction *I) {
MDNode *MD = I->getMetadata(LLVMContext::MD_tbaa);
assert(MD && "UpgradeInstWithTBAATag should have a TBAA tag");
// Check if the tag uses struct-path aware TBAA format.
if (isa<MDNode>(MD->getOperand(0)) && MD->getNumOperands() >= 3)
return;
if (MD->getNumOperands() == 3) {
Value *Elts[] = {
MD->getOperand(0),
MD->getOperand(1)
};
MDNode *ScalarType = MDNode::get(I->getContext(), Elts);
// Create a MDNode <ScalarType, ScalarType, offset 0, const>
Value *Elts2[] = {
ScalarType, ScalarType,
Constant::getNullValue(Type::getInt64Ty(I->getContext())),
MD->getOperand(2)
};
I->setMetadata(LLVMContext::MD_tbaa, MDNode::get(I->getContext(), Elts2));
} else {
// Create a MDNode <MD, MD, offset 0>
Value *Elts[] = {MD, MD,
Constant::getNullValue(Type::getInt64Ty(I->getContext()))};
I->setMetadata(LLVMContext::MD_tbaa, MDNode::get(I->getContext(), Elts));
}
}
Instruction *llvm::UpgradeBitCastInst(unsigned Opc, Value *V, Type *DestTy,
Instruction *&Temp) {
if (Opc != Instruction::BitCast)
return nullptr;
Temp = nullptr;
Type *SrcTy = V->getType();
if (SrcTy->isPtrOrPtrVectorTy() && DestTy->isPtrOrPtrVectorTy() &&
SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace()) {
LLVMContext &Context = V->getContext();
// We have no information about target data layout, so we assume that
// the maximum pointer size is 64bit.
Type *MidTy = Type::getInt64Ty(Context);
Temp = CastInst::Create(Instruction::PtrToInt, V, MidTy);
return CastInst::Create(Instruction::IntToPtr, Temp, DestTy);
}
return nullptr;
}
Value *llvm::UpgradeBitCastExpr(unsigned Opc, Constant *C, Type *DestTy) {
if (Opc != Instruction::BitCast)
return nullptr;
Type *SrcTy = C->getType();
if (SrcTy->isPtrOrPtrVectorTy() && DestTy->isPtrOrPtrVectorTy() &&
SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace()) {
LLVMContext &Context = C->getContext();
// We have no information about target data layout, so we assume that
// the maximum pointer size is 64bit.
Type *MidTy = Type::getInt64Ty(Context);
return ConstantExpr::getIntToPtr(ConstantExpr::getPtrToInt(C, MidTy),
DestTy);
}
return nullptr;
}
/// Check the debug info version number, if it is out-dated, drop the debug
/// info. Return true if module is modified.
bool llvm::UpgradeDebugInfo(Module &M) {
unsigned Version = getDebugMetadataVersionFromModule(M);
if (Version == DEBUG_METADATA_VERSION)
return false;
bool RetCode = StripDebugInfo(M);
if (RetCode) {
DiagnosticInfoDebugMetadataVersion DiagVersion(M, Version);
M.getContext().diagnose(DiagVersion);
}
return RetCode;
}
void llvm::UpgradeMDStringConstant(std::string &String) {
const std::string OldPrefix = "llvm.vectorizer.";
if (String == "llvm.vectorizer.unroll") {
String = "llvm.loop.interleave.count";
} else if (String.find(OldPrefix) == 0) {
String.replace(0, OldPrefix.size(), "llvm.loop.vectorize.");
}
}
Reference in New Issue View Git Blame Copy Permalink