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Refactor the LiveOutInfo interface into a few methods on FunctionLoweringInfo

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and make the actual map private.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126376 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2011-02-24 10:00:08 +00:00
parent 2dbe2850d0
commit e1497b9791
3 changed files with 35 additions and 20 deletions
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29
include/llvm/CodeGen/FunctionLoweringInfo.h
View File

@ -105,9 +105,6 @@ public:
APInt KnownOne, KnownZero;
LiveOutInfo() : NumSignBits(0), KnownOne(1, 0), KnownZero(1, 0) {}
};
/// LiveOutRegInfo - Information about live out vregs.
IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
/// PHINodesToUpdate - A list of phi instructions whose operand list will
/// be updated after processing the current basic block.
@ -143,12 +140,38 @@ public:
return R = CreateRegs(V->getType());
}
/// GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the
/// register is a PHI destination and the PHI's LiveOutInfo is not valid.
const LiveOutInfo *GetLiveOutRegInfo(unsigned Reg) {
if (!LiveOutRegInfo.inBounds(Reg))
return NULL;
return &LiveOutRegInfo[Reg];
}
/// AddLiveOutRegInfo - Adds LiveOutInfo for a register.
void AddLiveOutRegInfo(unsigned Reg, unsigned NumSignBits,
const APInt &KnownZero, const APInt &KnownOne) {
// Only install this information if it tells us something.
if (NumSignBits == 1 && KnownZero == 0 && KnownOne == 0)
return;
LiveOutRegInfo.grow(Reg);
LiveOutInfo &LOI = LiveOutRegInfo[Reg];
LOI.NumSignBits = NumSignBits;
LOI.KnownOne = KnownOne;
LOI.KnownZero = KnownZero;
}
/// setByValArgumentFrameIndex - Record frame index for the byval
/// argument.
void setByValArgumentFrameIndex(const Argument *A, int FI);
/// getByValArgumentFrameIndex - Get frame index for the byval argument.
int getByValArgumentFrameIndex(const Argument *A);
private:
/// LiveOutRegInfo - Information about live out vregs.
IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
};
/// AddCatchInfo - Extract the personality and type infos from an eh.selector

15
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -641,16 +641,17 @@ SDValue RegsForValue::getCopyFromRegs(SelectionDAG &DAG,
// If the source register was virtual and if we know something about it,
// add an assert node.
if (!TargetRegisterInfo::isVirtualRegister(Regs[Part+i]) ||
!RegisterVT.isInteger() || RegisterVT.isVector() ||
!FuncInfo.LiveOutRegInfo.inBounds(Regs[Part+i]))
!RegisterVT.isInteger() || RegisterVT.isVector())
continue;
const FunctionLoweringInfo::LiveOutInfo *LOI =
FuncInfo.GetLiveOutRegInfo(Regs[Part+i]);
if (!LOI)
continue;
const FunctionLoweringInfo::LiveOutInfo &LOI =
FuncInfo.LiveOutRegInfo[Regs[Part+i]];
unsigned RegSize = RegisterVT.getSizeInBits();
unsigned NumSignBits = LOI.NumSignBits;
unsigned NumZeroBits = LOI.KnownZero.countLeadingOnes();
unsigned NumSignBits = LOI->NumSignBits;
unsigned NumZeroBits = LOI->KnownZero.countLeadingOnes();
// FIXME: We capture more information than the dag can represent. For
// now, just use the tightest assertzext/assertsext possible.

11
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -480,16 +480,7 @@ void SelectionDAGISel::ComputeLiveOutVRegInfo() {
unsigned NumSignBits = CurDAG->ComputeNumSignBits(Src);
Mask = APInt::getAllOnesValue(SrcVT.getSizeInBits());
CurDAG->ComputeMaskedBits(Src, Mask, KnownZero, KnownOne);
// Only install this information if it tells us something.
if (NumSignBits != 1 || KnownZero != 0 || KnownOne != 0) {
FuncInfo->LiveOutRegInfo.grow(DestReg);
FunctionLoweringInfo::LiveOutInfo &LOI =
FuncInfo->LiveOutRegInfo[DestReg];
LOI.NumSignBits = NumSignBits;
LOI.KnownOne = KnownOne;
LOI.KnownZero = KnownZero;
}
FuncInfo->AddLiveOutRegInfo(DestReg, NumSignBits, KnownZero, KnownOne);
} while (!Worklist.empty());
}