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Fix another dtor issue. The function local statics in this function were

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being destroyed at inconvenient times.  Switch to using non-local ManagedStatic
objects, which actually also speeds up ConstRules::get.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30931 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-10-13 17:22:21 +00:00
parent 5395538307
commit 0eff5ad3db
1 changed files with 43 additions and 33 deletions
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76
lib/VMCore/ConstantFold.cpp
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@ -23,9 +23,10 @@
#include "llvm/Instructions.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MathExtras.h"
#include <limits>
#include <cmath>
using namespace llvm;
@ -584,49 +585,58 @@ struct VISIBILITY_HIDDEN DirectFPRules
};
} // end anonymous namespace
static ManagedStatic<EmptyRules> EmptyR;
static ManagedStatic<BoolRules> BoolR;
static ManagedStatic<NullPointerRules> NullPointerR;
static ManagedStatic<ConstantPackedRules> ConstantPackedR;
static ManagedStatic<GeneralPackedRules> GeneralPackedR;
static ManagedStatic<DirectIntRules<ConstantSInt, signed char ,
&Type::SByteTy> > SByteR;
static ManagedStatic<DirectIntRules<ConstantUInt, unsigned char ,
&Type::UByteTy> > UByteR;
static ManagedStatic<DirectIntRules<ConstantSInt, signed short,
&Type::ShortTy> > ShortR;
static ManagedStatic<DirectIntRules<ConstantUInt, unsigned short,
&Type::UShortTy> > UShortR;
static ManagedStatic<DirectIntRules<ConstantSInt, signed int ,
&Type::IntTy> > IntR;
static ManagedStatic<DirectIntRules<ConstantUInt, unsigned int ,
&Type::UIntTy> > UIntR;
static ManagedStatic<DirectIntRules<ConstantSInt, int64_t ,
&Type::LongTy> > LongR;
static ManagedStatic<DirectIntRules<ConstantUInt, uint64_t ,
&Type::ULongTy> > ULongR;
static ManagedStatic<DirectFPRules <ConstantFP , float ,
&Type::FloatTy> > FloatR;
static ManagedStatic<DirectFPRules <ConstantFP , double ,
&Type::DoubleTy> > DoubleR;
/// ConstRules::get - This method returns the constant rules implementation that
/// implements the semantics of the two specified constants.
ConstRules &ConstRules::get(const Constant *V1, const Constant *V2) {
static EmptyRules EmptyR;
static BoolRules BoolR;
static NullPointerRules NullPointerR;
static ConstantPackedRules ConstantPackedR;
static GeneralPackedRules GeneralPackedR;
static DirectIntRules<ConstantSInt, signed char , &Type::SByteTy> SByteR;
static DirectIntRules<ConstantUInt, unsigned char , &Type::UByteTy> UByteR;
static DirectIntRules<ConstantSInt, signed short, &Type::ShortTy> ShortR;
static DirectIntRules<ConstantUInt, unsigned short, &Type::UShortTy> UShortR;
static DirectIntRules<ConstantSInt, signed int , &Type::IntTy> IntR;
static DirectIntRules<ConstantUInt, unsigned int , &Type::UIntTy> UIntR;
static DirectIntRules<ConstantSInt, int64_t , &Type::LongTy> LongR;
static DirectIntRules<ConstantUInt, uint64_t , &Type::ULongTy> ULongR;
static DirectFPRules <ConstantFP , float , &Type::FloatTy> FloatR;
static DirectFPRules <ConstantFP , double , &Type::DoubleTy> DoubleR;
if (isa<ConstantExpr>(V1) || isa<ConstantExpr>(V2) ||
isa<GlobalValue>(V1) || isa<GlobalValue>(V2) ||
isa<UndefValue>(V1) || isa<UndefValue>(V2))
return EmptyR;
return *EmptyR;
switch (V1->getType()->getTypeID()) {
default: assert(0 && "Unknown value type for constant folding!");
case Type::BoolTyID: return BoolR;
case Type::PointerTyID: return NullPointerR;
case Type::SByteTyID: return SByteR;
case Type::UByteTyID: return UByteR;
case Type::ShortTyID: return ShortR;
case Type::UShortTyID: return UShortR;
case Type::IntTyID: return IntR;
case Type::UIntTyID: return UIntR;
case Type::LongTyID: return LongR;
case Type::ULongTyID: return ULongR;
case Type::FloatTyID: return FloatR;
case Type::DoubleTyID: return DoubleR;
case Type::BoolTyID: return *BoolR;
case Type::PointerTyID: return *NullPointerR;
case Type::SByteTyID: return *SByteR;
case Type::UByteTyID: return *UByteR;
case Type::ShortTyID: return *ShortR;
case Type::UShortTyID: return *UShortR;
case Type::IntTyID: return *IntR;
case Type::UIntTyID: return *UIntR;
case Type::LongTyID: return *LongR;
case Type::ULongTyID: return *ULongR;
case Type::FloatTyID: return *FloatR;
case Type::DoubleTyID: return *DoubleR;
case Type::PackedTyID:
if (isa<ConstantPacked>(V1) && isa<ConstantPacked>(V2))
return ConstantPackedR;
return GeneralPackedR; // Constant folding rules for ConstantAggregateZero.
return *ConstantPackedR;
return *GeneralPackedR; // Constant folding rules for ConstantAggregateZero.
}
}