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Reapply r112091 and r111922, support for metadata linking, with a 

fix: add a flag to MapValue and friends which indicates whether
any module-level mappings are being made. In the common case of
inlining, no module-level mappings are needed, so MapValue doesn't
need to examine non-function-local metadata, which can be very
expensive in the case of a large module with really deep metadata
(e.g. a large C++ program compiled with -g).

This flag is a little awkward; perhaps eventually it can be moved
into the ClonedCodeInfo class.

llvm-svn: 112190
This commit is contained in:
Dan Gohman 2010-08-26 15:41:53 +00:00
parent 9bf0380a54
commit ca26f79051
12 changed files with 154 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
llvm/include/llvm/Transforms/Utils/Cloning.h
View File

@ -121,8 +121,12 @@ Loop *CloneLoop(Loop *L, LPPassManager *LPM, LoopInfo *LI,
/// the function from their old to new values. The final argument captures
/// information about the cloned code if non-null.
///
/// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
/// mappings.
///
Function *CloneFunction(const Function *F,
ValueMap<const Value*, Value*> &VMap,
bool ModuleLevelChanges,
ClonedCodeInfo *CodeInfo = 0);
/// CloneFunction - Version of the function that doesn't need the VMap.
@ -133,13 +137,17 @@ inline Function *CloneFunction(const Function *F, ClonedCodeInfo *CodeInfo = 0){
}
/// Clone OldFunc into NewFunc, transforming the old arguments into references
/// to ArgMap values. Note that if NewFunc already has basic blocks, the ones
/// to VMap values. Note that if NewFunc already has basic blocks, the ones
/// cloned into it will be added to the end of the function. This function
/// fills in a list of return instructions, and can optionally append the
/// specified suffix to all values cloned.
///
/// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
/// mappings.
///
void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
ValueMap<const Value*, Value*> &VMap,
bool ModuleLevelChanges,
SmallVectorImpl<ReturnInst*> &Returns,
const char *NameSuffix = "",
ClonedCodeInfo *CodeInfo = 0);
@ -151,8 +159,13 @@ void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
/// constant arguments cause a significant amount of code in the callee to be
/// dead. Since this doesn't produce an exactly copy of the input, it can't be
/// used for things like CloneFunction or CloneModule.
///
/// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
/// mappings.
///
void CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
ValueMap<const Value*, Value*> &VMap,
bool ModuleLevelChanges,
SmallVectorImpl<ReturnInst*> &Returns,
const char *NameSuffix = "",
ClonedCodeInfo *CodeInfo = 0,

6
llvm/include/llvm/Transforms/Utils/ValueMapper.h
View File

@ -22,8 +22,10 @@ namespace llvm {
class Instruction;
typedef ValueMap<const Value *, Value *> ValueToValueMapTy;
Value *MapValue(const Value *V, ValueToValueMapTy &VM);
void RemapInstruction(Instruction *I, ValueToValueMapTy &VM);
Value *MapValue(const Value *V, ValueToValueMapTy &VM,
bool ModuleLevelChanges);
void RemapInstruction(Instruction *I, ValueToValueMapTy &VM,
bool ModuleLevelChanges);
} // End llvm namespace
#endif

27
llvm/lib/Linker/LinkModules.cpp
View File

@ -460,7 +460,8 @@ static void LinkNamedMDNodes(Module *Dest, Module *Src,
// Add Src elements into Dest node.
for (unsigned i = 0, e = SrcNMD->getNumOperands(); i != e; ++i)
DestNMD->addOperand(cast<MDNode>(MapValue(SrcNMD->getOperand(i),
ValueMap)));
ValueMap,
true)));
}
}
@ -823,7 +824,7 @@ static bool LinkGlobalInits(Module *Dest, const Module *Src,
if (SGV->hasInitializer()) { // Only process initialized GV's
// Figure out what the initializer looks like in the dest module...
Constant *SInit =
cast<Constant>(MapValue(SGV->getInitializer(), ValueMap));
cast<Constant>(MapValue(SGV->getInitializer(), ValueMap, true));
// Grab destination global variable or alias.
GlobalValue *DGV = cast<GlobalValue>(ValueMap[SGV]->stripPointerCasts());
@ -1005,12 +1006,30 @@ static bool LinkFunctionBody(Function *Dest, Function *Src,
// the Source function as operands. Loop through all of the operands of the
// functions and patch them up to point to the local versions...
//
// This is the same as RemapInstruction, except that it avoids remapping
// instruction and basic block operands.
//
for (Function::iterator BB = Dest->begin(), BE = Dest->end(); BB != BE; ++BB)
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
// Remap operands.
for (Instruction::op_iterator OI = I->op_begin(), OE = I->op_end();
OI != OE; ++OI)
if (!isa<Instruction>(*OI) && !isa<BasicBlock>(*OI))
*OI = MapValue(*OI, ValueMap);
*OI = MapValue(*OI, ValueMap, true);
// Remap attached metadata.
SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
I->getAllMetadata(MDs);
for (SmallVectorImpl<std::pair<unsigned, MDNode *> >::iterator
MI = MDs.begin(), ME = MDs.end(); MI != ME; ++MI) {
Value *Old = MI->second;
if (!isa<Instruction>(Old) && !isa<BasicBlock>(Old)) {
Value *New = MapValue(Old, ValueMap, true);
if (New != Old)
I->setMetadata(MI->first, cast<MDNode>(New));
}
}
}
// There is no need to map the arguments anymore.
for (Function::arg_iterator I = Src->arg_begin(), E = Src->arg_end();

2
llvm/lib/Target/PIC16/PIC16Passes/PIC16Cloner.cpp
View File

@ -256,7 +256,7 @@ PIC16Cloner::cloneFunction(Function *OrgF) {
CloneAutos(OrgF);
// Now create the clone.
ClonedF = CloneFunction(OrgF, VMap);
ClonedF = CloneFunction(OrgF, VMap, /*ModuleLevelChanges=*/false);
// The new function should be for interrupt line. Therefore should have
// the name suffixed with IL and section attribute marked with IL.

3
llvm/lib/Transforms/IPO/PartialInlining.cpp
View File

@ -68,7 +68,8 @@ Function* PartialInliner::unswitchFunction(Function* F) {
// Clone the function, so that we can hack away on it.
ValueMap<const Value*, Value*> VMap;
Function* duplicateFunction = CloneFunction(F, VMap);
Function* duplicateFunction = CloneFunction(F, VMap,
/*ModuleLevelChanges=*/false);
duplicateFunction->setLinkage(GlobalValue::InternalLinkage);
F->getParent()->getFunctionList().push_back(duplicateFunction);
BasicBlock* newEntryBlock = cast<BasicBlock>(VMap[entryBlock]);

3
llvm/lib/Transforms/IPO/PartialSpecialization.cpp
View File

@ -74,7 +74,8 @@ SpecializeFunction(Function* F,
deleted[arg->getArgNo()] = arg;
}
Function* NF = CloneFunction(F, replacements);
Function* NF = CloneFunction(F, replacements,
/*ModuleLevelChanges=*/false);
NF->setLinkage(GlobalValue::InternalLinkage);
F->getParent()->getFunctionList().push_back(NF);

26
llvm/lib/Transforms/Utils/CloneFunction.cpp
View File

@ -69,10 +69,11 @@ BasicBlock *llvm::CloneBasicBlock(const BasicBlock *BB,
}
// Clone OldFunc into NewFunc, transforming the old arguments into references to
// ArgMap values.
// VMap values.
//
void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
ValueToValueMapTy &VMap,
bool ModuleLevelChanges,
SmallVectorImpl<ReturnInst*> &Returns,
const char *NameSuffix, ClonedCodeInfo *CodeInfo) {
assert(NameSuffix && "NameSuffix cannot be null!");
@ -126,7 +127,7 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
BE = NewFunc->end(); BB != BE; ++BB)
// Loop over all instructions, fixing each one as we find it...
for (BasicBlock::iterator II = BB->begin(); II != BB->end(); ++II)
RemapInstruction(II, VMap);
RemapInstruction(II, VMap, ModuleLevelChanges);
}
/// CloneFunction - Return a copy of the specified function, but without
@ -139,6 +140,7 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
///
Function *llvm::CloneFunction(const Function *F,
ValueToValueMapTy &VMap,
bool ModuleLevelChanges,
ClonedCodeInfo *CodeInfo) {
std::vector<const Type*> ArgTypes;
@ -167,7 +169,7 @@ Function *llvm::CloneFunction(const Function *F,
}
SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(NewF, F, VMap, Returns, "", CodeInfo);
CloneFunctionInto(NewF, F, VMap, ModuleLevelChanges, Returns, "", CodeInfo);
return NewF;
}
@ -180,6 +182,7 @@ namespace {
Function *NewFunc;
const Function *OldFunc;
ValueToValueMapTy &VMap;
bool ModuleLevelChanges;
SmallVectorImpl<ReturnInst*> &Returns;
const char *NameSuffix;
ClonedCodeInfo *CodeInfo;
@ -187,12 +190,14 @@ namespace {
public:
PruningFunctionCloner(Function *newFunc, const Function *oldFunc,
ValueToValueMapTy &valueMap,
bool moduleLevelChanges,
SmallVectorImpl<ReturnInst*> &returns,
const char *nameSuffix,
ClonedCodeInfo *codeInfo,
const TargetData *td)
: NewFunc(newFunc), OldFunc(oldFunc), VMap(valueMap), Returns(returns),
NameSuffix(nameSuffix), CodeInfo(codeInfo), TD(td) {
: NewFunc(newFunc), OldFunc(oldFunc),
VMap(valueMap), ModuleLevelChanges(moduleLevelChanges),
Returns(returns), NameSuffix(nameSuffix), CodeInfo(codeInfo), TD(td) {
}
/// CloneBlock - The specified block is found to be reachable, clone it and
@ -313,7 +318,7 @@ ConstantFoldMappedInstruction(const Instruction *I) {
SmallVector<Constant*, 8> Ops;
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
if (Constant *Op = dyn_cast_or_null<Constant>(MapValue(I->getOperand(i),
VMap)))
VMap, ModuleLevelChanges)))
Ops.push_back(Op);
else
return 0; // All operands not constant!
@ -355,6 +360,7 @@ UpdateInlinedAtInfo(const DebugLoc &InsnDL, const DebugLoc &TheCallDL,
/// used for things like CloneFunction or CloneModule.
void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
ValueToValueMapTy &VMap,
bool ModuleLevelChanges,
SmallVectorImpl<ReturnInst*> &Returns,
const char *NameSuffix,
ClonedCodeInfo *CodeInfo,
@ -368,8 +374,8 @@ void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
assert(VMap.count(II) && "No mapping from source argument specified!");
#endif
PruningFunctionCloner PFC(NewFunc, OldFunc, VMap, Returns,
NameSuffix, CodeInfo, TD);
PruningFunctionCloner PFC(NewFunc, OldFunc, VMap, ModuleLevelChanges,
Returns, NameSuffix, CodeInfo, TD);
// Clone the entry block, and anything recursively reachable from it.
std::vector<const BasicBlock*> CloneWorklist;
@ -449,7 +455,7 @@ void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
I->setDebugLoc(DebugLoc());
}
}
RemapInstruction(I, VMap);
RemapInstruction(I, VMap, ModuleLevelChanges);
}
}
@ -471,7 +477,7 @@ void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
if (BasicBlock *MappedBlock =
cast_or_null<BasicBlock>(VMap[PN->getIncomingBlock(pred)])) {
Value *InVal = MapValue(PN->getIncomingValue(pred),
VMap);
VMap, ModuleLevelChanges);
assert(InVal && "Unknown input value?");
PN->setIncomingValue(pred, InVal);
PN->setIncomingBlock(pred, MappedBlock);

24
llvm/lib/Transforms/Utils/CloneModule.cpp
View File

@ -89,7 +89,8 @@ Module *llvm::CloneModule(const Module *M,
GlobalVariable *GV = cast<GlobalVariable>(VMap[I]);
if (I->hasInitializer())
GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
VMap)));
VMap,
true)));
GV->setLinkage(I->getLinkage());
GV->setThreadLocal(I->isThreadLocal());
GV->setConstant(I->isConstant());
@ -108,7 +109,7 @@ Module *llvm::CloneModule(const Module *M,
}
SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(F, I, VMap, Returns);
CloneFunctionInto(F, I, VMap, /*ModuleLevelChanges=*/true, Returns);
}
F->setLinkage(I->getLinkage());
@ -120,7 +121,7 @@ Module *llvm::CloneModule(const Module *M,
GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
GA->setLinkage(I->getLinkage());
if (const Constant* C = I->getAliasee())
GA->setAliasee(cast<Constant>(MapValue(C, VMap)));
GA->setAliasee(cast<Constant>(MapValue(C, VMap, true)));
}
// And named metadata....
@ -129,23 +130,8 @@ Module *llvm::CloneModule(const Module *M,
const NamedMDNode &NMD = *I;
NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
NewNMD->addOperand(cast<MDNode>(MapValue(NMD.getOperand(i), VMap)));
NewNMD->addOperand(cast<MDNode>(MapValue(NMD.getOperand(i), VMap, true)));
}
// Update metadata attach with instructions.
for (Module::iterator MI = New->begin(), ME = New->end(); MI != ME; ++MI)
for (Function::iterator FI = MI->begin(), FE = MI->end();
FI != FE; ++FI)
for (BasicBlock::iterator BI = FI->begin(), BE = FI->end();
BI != BE; ++BI) {
SmallVector<std::pair<unsigned, MDNode *>, 4 > MDs;
BI->getAllMetadata(MDs);
for (SmallVector<std::pair<unsigned, MDNode *>, 4>::iterator
MDI = MDs.begin(), MDE = MDs.end(); MDI != MDE; ++MDI) {
Value *MappedValue = MapValue(MDI->second, VMap);
if (MDI->second != MappedValue && MappedValue)
BI->setMetadata(MDI->first, cast<MDNode>(MappedValue));
}
}
return New;
}

3
llvm/lib/Transforms/Utils/InlineFunction.cpp
View File

@ -365,7 +365,8 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI) {
// have no dead or constant instructions leftover after inlining occurs
// (which can happen, e.g., because an argument was constant), but we'll be
// happy with whatever the cloner can do.
CloneAndPruneFunctionInto(Caller, CalledFunc, VMap, Returns, ".i",
CloneAndPruneFunctionInto(Caller, CalledFunc, VMap,
/*ModuleLevelChanges=*/false, Returns, ".i",
&InlinedFunctionInfo, IFI.TD, TheCall);
// Remember the first block that is newly cloned over.

82
llvm/lib/Transforms/Utils/ValueMapper.cpp
View File

@ -20,28 +20,51 @@
#include "llvm/ADT/SmallVector.h"
using namespace llvm;
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM,
bool ModuleLevelChanges) {
Value *&VMSlot = VM[V];
if (VMSlot) return VMSlot; // Does it exist in the map yet?
// NOTE: VMSlot can be invalidated by any reference to VM, which can grow the
// DenseMap. This includes any recursive calls to MapValue.
// Global values and non-function-local metadata do not need to be seeded into
// the VM if they are using the identity mapping.
// Global values do not need to be seeded into the VM if they
// are using the identity mapping.
if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V) ||
(isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal()))
(isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal() &&
!ModuleLevelChanges))
return VMSlot = const_cast<Value*>(V);
if (const MDNode *MD = dyn_cast<MDNode>(V)) {
SmallVector<Value*, 4> Elts;
for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i)
Elts.push_back(MD->getOperand(i) ? MapValue(MD->getOperand(i), VM) : 0);
return VM[V] = MDNode::get(V->getContext(), Elts.data(), Elts.size());
// Start by assuming that we'll use the identity mapping.
VMSlot = const_cast<Value*>(V);
// Check all operands to see if any need to be remapped.
for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
Value *OP = MD->getOperand(i);
if (!OP || MapValue(OP, VM, ModuleLevelChanges) == OP) continue;
// Ok, at least one operand needs remapping.
MDNode *Dummy = MDNode::getTemporary(V->getContext(), 0, 0);
VM[V] = Dummy;
SmallVector<Value*, 4> Elts;
Elts.reserve(MD->getNumOperands());
for (i = 0; i != e; ++i)
Elts.push_back(MD->getOperand(i) ?
MapValue(MD->getOperand(i), VM, ModuleLevelChanges) : 0);
MDNode *NewMD = MDNode::get(V->getContext(), Elts.data(), Elts.size());
Dummy->replaceAllUsesWith(NewMD);
MDNode::deleteTemporary(Dummy);
return VM[V] = NewMD;
}
// No operands needed remapping; keep the identity map.
return const_cast<Value*>(V);
}
Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
if (C == 0) return 0;
if (C == 0)
return 0;
if (isa<ConstantInt>(C) || isa<ConstantFP>(C) ||
isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) ||
@ -51,7 +74,7 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
for (User::op_iterator b = CA->op_begin(), i = b, e = CA->op_end();
i != e; ++i) {
Value *MV = MapValue(*i, VM);
Value *MV = MapValue(*i, VM, ModuleLevelChanges);
if (MV != *i) {
// This array must contain a reference to a global, make a new array
// and return it.
@ -62,7 +85,8 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
Values.push_back(cast<Constant>(*j));
Values.push_back(cast<Constant>(MV));
for (++i; i != e; ++i)
Values.push_back(cast<Constant>(MapValue(*i, VM)));
Values.push_back(cast<Constant>(MapValue(*i, VM,
ModuleLevelChanges)));
return VM[V] = ConstantArray::get(CA->getType(), Values);
}
}
@ -72,7 +96,7 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
for (User::op_iterator b = CS->op_begin(), i = b, e = CS->op_end();
i != e; ++i) {
Value *MV = MapValue(*i, VM);
Value *MV = MapValue(*i, VM, ModuleLevelChanges);
if (MV != *i) {
// This struct must contain a reference to a global, make a new struct
// and return it.
@ -83,7 +107,8 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
Values.push_back(cast<Constant>(*j));
Values.push_back(cast<Constant>(MV));
for (++i; i != e; ++i)
Values.push_back(cast<Constant>(MapValue(*i, VM)));
Values.push_back(cast<Constant>(MapValue(*i, VM,
ModuleLevelChanges)));
return VM[V] = ConstantStruct::get(CS->getType(), Values);
}
}
@ -93,14 +118,14 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
std::vector<Constant*> Ops;
for (User::op_iterator i = CE->op_begin(), e = CE->op_end(); i != e; ++i)
Ops.push_back(cast<Constant>(MapValue(*i, VM)));
Ops.push_back(cast<Constant>(MapValue(*i, VM, ModuleLevelChanges)));
return VM[V] = CE->getWithOperands(Ops);
}
if (ConstantVector *CV = dyn_cast<ConstantVector>(C)) {
for (User::op_iterator b = CV->op_begin(), i = b, e = CV->op_end();
i != e; ++i) {
Value *MV = MapValue(*i, VM);
Value *MV = MapValue(*i, VM, ModuleLevelChanges);
if (MV != *i) {
// This vector value must contain a reference to a global, make a new
// vector constant and return it.
@ -111,7 +136,8 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
Values.push_back(cast<Constant>(*j));
Values.push_back(cast<Constant>(MV));
for (++i; i != e; ++i)
Values.push_back(cast<Constant>(MapValue(*i, VM)));
Values.push_back(cast<Constant>(MapValue(*i, VM,
ModuleLevelChanges)));
return VM[V] = ConstantVector::get(Values);
}
}
@ -119,19 +145,33 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
}
BlockAddress *BA = cast<BlockAddress>(C);
Function *F = cast<Function>(MapValue(BA->getFunction(), VM));
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(),VM));
Function *F = cast<Function>(MapValue(BA->getFunction(), VM,
ModuleLevelChanges));
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(),VM,
ModuleLevelChanges));
return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
}
/// RemapInstruction - Convert the instruction operands from referencing the
/// current values into those specified by VMap.
///
void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap) {
void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
bool ModuleLevelChanges) {
// Remap operands.
for (User::op_iterator op = I->op_begin(), E = I->op_end(); op != E; ++op) {
Value *V = MapValue(*op, VMap);
Value *V = MapValue(*op, VMap, ModuleLevelChanges);
assert(V && "Referenced value not in value map!");
*op = V;
}
}
// Remap attached metadata.
SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
I->getAllMetadata(MDs);
for (SmallVectorImpl<std::pair<unsigned, MDNode *> >::iterator
MI = MDs.begin(), ME = MDs.end(); MI != ME; ++MI) {
Value *Old = MI->second;
Value *New = MapValue(Old, VMap, ModuleLevelChanges);
if (New != Old)
I->setMetadata(MI->first, cast<MDNode>(New));
}
}

15
llvm/test/Linker/metadata-a.ll Normal file
View File

@ -0,0 +1,15 @@
; RUN: llvm-link %s %p/metadata-b.ll -S -o - | FileCheck %s
; CHECK: define void @foo(i32 %a)
; CHECK: ret void, !attach !0, !also !{i32 %a}
; CHECK: define void @goo(i32 %b)
; CHECK: ret void, !attach !1, !and !{i32 %b}
; CHECK: !0 = metadata !{i32 524334, void (i32)* @foo}
; CHECK: !1 = metadata !{i32 524334, void (i32)* @goo}
define void @foo(i32 %a) nounwind {
entry:
ret void, !attach !0, !also !{ i32 %a }
}
!0 = metadata !{i32 524334, void (i32)* @foo}

9
llvm/test/Linker/metadata-b.ll Normal file
View File

@ -0,0 +1,9 @@
; This file is for use with metadata-a.ll
; RUN: true
define void @goo(i32 %b) nounwind {
entry:
ret void, !attach !0, !and !{ i32 %b }
}
!0 = metadata !{i32 524334, void (i32)* @goo}