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Move AllocInfo structure to a private AllocInfo.h header file.

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Make FnAllocState contain vectors of AllocInfo, instead of LLVM Constants.
Give doFinalization a method comment, and let it do the work of converting
 AllocInfos to LLVM Constants.

llvm-svn: 9451
This commit is contained in:
Brian Gaeke 2003-10-23 20:32:55 +00:00
parent 98fbdd344e
commit 6d9f7ff0df
1 changed files with 15 additions and 48 deletions
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63
lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
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@ -20,6 +20,7 @@
//
//===----------------------------------------------------------------------===//
#include "AllocInfo.h"
#include "IGNode.h"
#include "PhyRegAlloc.h"
#include "RegAllocCommon.h"
@ -1129,54 +1130,12 @@ void PhyRegAlloc::allocateStackSpace4SpilledLRs() {
}
namespace {
/// AllocInfo - Structure representing one instruction's
/// operand's-worth of register allocation state. We create tables
/// made out of these data structures to generate mapping information
/// for this register allocator. (FIXME: This might move to a header
/// file at some point.)
///
struct AllocInfo {
unsigned Instruction;
unsigned Operand;
unsigned AllocState;
int Placement;
AllocInfo (unsigned Instruction_, unsigned Operand_,
unsigned AllocState_, int Placement_) :
Instruction (Instruction_), Operand (Operand_),
AllocState (AllocState_), Placement (Placement_) { }
/// getConstantType - Return a StructType representing an AllocInfo
/// object.
///
static StructType *getConstantType () {
std::vector<const Type *> TV;
TV.push_back (Type::UIntTy);
TV.push_back (Type::UIntTy);
TV.push_back (Type::UIntTy);
TV.push_back (Type::IntTy);
return StructType::get (TV);
}
/// toConstant - Convert this AllocInfo into an LLVM Constant of type
/// getConstantType(), and return the Constant.
///
Constant *toConstant () const {
StructType *ST = getConstantType ();
std::vector<Constant *> CV;
CV.push_back (ConstantUInt::get (Type::UIntTy, Instruction));
CV.push_back (ConstantUInt::get (Type::UIntTy, Operand));
CV.push_back (ConstantUInt::get (Type::UIntTy, AllocState));
CV.push_back (ConstantSInt::get (Type::IntTy, Placement));
return ConstantStruct::get (ST, CV);
}
};
}
/// Save the global register allocation decisions made by the register
/// allocator so that they can be accessed later (sort of like "poor man's
/// debug info").
///
void PhyRegAlloc::saveState () {
std::vector<Constant *> &state = FnAllocState[Fn];
std::vector<AllocInfo> &state = FnAllocState[Fn];
unsigned Insn = 0;
LiveRangeMapType::const_iterator HMIEnd = LRI->getLiveRangeMap ()->end ();
for (const_inst_iterator II=inst_begin (Fn), IE=inst_end (Fn); II != IE; ++II)
@ -1204,11 +1163,11 @@ void PhyRegAlloc::saveState () {
Placement = L->getSpillOffFromFP ();
}
}
state.push_back (AllocInfo (Insn, i, AllocState,
Placement).toConstant ());
state.push_back (AllocInfo (Insn, i, AllocState, Placement));
}
}
/// Check the saved state filled in by saveState(), and abort if it looks
/// wrong. Only used when debugging.
///
@ -1216,6 +1175,11 @@ void PhyRegAlloc::verifySavedState () {
/// not yet implemented
}
/// Finish the job of saveState(), by collapsing FnAllocState into an LLVM
/// Constant and stuffing it inside the Module. (NOTE: Soon, there will be
/// other, better ways of storing the saved state; this one is cumbersome and
/// will never work with the JIT.)
///
bool PhyRegAlloc::doFinalization (Module &M) {
if (!SaveRegAllocState)
return false; // Nothing to do here, unless we're saving state.
@ -1234,11 +1198,14 @@ bool PhyRegAlloc::doFinalization (Module &M) {
if (FnAllocState.find (F) == FnAllocState.end ()) {
allstate.push_back (ConstantPointerNull::get (PT));
} else {
std::vector<Constant *> &state = FnAllocState[F];
std::vector<AllocInfo> &state = FnAllocState[F];
// Convert state into an LLVM ConstantArray, and put it in a
// ConstantStruct (named S) along with its size.
unsigned Size = state.size ();
std::vector<Constant *> stateConstants;
for (unsigned i = 0, s = state.size (); i != s; ++i)
stateConstants.push_back (state[i].toConstant ());
unsigned Size = stateConstants.size ();
ArrayType *AT = ArrayType::get (AllocInfo::getConstantType (), Size);
std::vector<const Type *> TV;
TV.push_back (Type::UIntTy);
@ -1246,7 +1213,7 @@ bool PhyRegAlloc::doFinalization (Module &M) {
StructType *ST = StructType::get (TV);
std::vector<Constant *> CV;
CV.push_back (ConstantUInt::get (Type::UIntTy, Size));
CV.push_back (ConstantArray::get (AT, state));
CV.push_back (ConstantArray::get (AT, stateConstants));
Constant *S = ConstantStruct::get (ST, CV);
GlobalVariable *GV =