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avoid calling the virtual isMoveInstr method endlessly by caching its results.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29994 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-08-31 05:54:43 +00:00
parent b495fb0e8c
commit 91725b7585
4 changed files with 107 additions and 94 deletions
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49
include/llvm/CodeGen/LiveInterval.h
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@@ -78,10 +78,12 @@ namespace llvm {
float weight; // weight of this interval
Ranges ranges; // the ranges in which this register is live
private:
/// InstDefiningValue - This tracks the def index of the instruction that
/// defines a particular value number in the interval. This may be ~0,
/// which is treated as unknown, or ~1, which is a deleted value number.
SmallVector<unsigned, 4> InstDefiningValue;
/// ValueNumberInfo - If this value number is not defined by a copy, this
/// holds ~0,x. If the value number is not in use, it contains ~1,x to
/// indicate that the value # is not used. If the val# is defined by a
/// copy, the first entry is the instruction # of the copy, and the second
/// is the register number copied from.
SmallVector<std::pair<unsigned,unsigned>, 4> ValueNumberInfo;
public:
LiveInterval(unsigned Reg, float Weight)
@@ -113,31 +115,44 @@ namespace llvm {
std::swap(reg, other.reg);
std::swap(weight, other.weight);
std::swap(ranges, other.ranges);
std::swap(InstDefiningValue, other.InstDefiningValue);
std::swap(ValueNumberInfo, other.ValueNumberInfo);
}
bool containsOneValue() const { return InstDefiningValue.size() == 1; }
bool containsOneValue() const { return ValueNumberInfo.size() == 1; }
unsigned getNumValNums() const { return InstDefiningValue.size(); }
unsigned getNumValNums() const { return ValueNumberInfo.size(); }
/// getNextValue - Create a new value number and return it. MIIdx specifies
/// the instruction that defines the value number.
unsigned getNextValue(unsigned MIIdx) {
InstDefiningValue.push_back(MIIdx);
return InstDefiningValue.size()-1;
unsigned getNextValue(unsigned MIIdx, unsigned SrcReg) {
ValueNumberInfo.push_back(std::make_pair(MIIdx, SrcReg));
return ValueNumberInfo.size()-1;
}
/// getInstForValNum - Return the machine instruction index that defines the
/// specified value number.
unsigned getInstForValNum(unsigned ValNo) const {
assert(ValNo < InstDefiningValue.size());
return InstDefiningValue[ValNo];
assert(ValNo < ValueNumberInfo.size());
return ValueNumberInfo[ValNo].first;
}
/// setInstDefiningValNum - Change the instruction defining the specified
/// value number to the specified instruction.
void setInstDefiningValNum(unsigned ValNo, unsigned MIIdx) {
InstDefiningValue[ValNo] = MIIdx;
unsigned getSrcRegForValNum(unsigned ValNo) const {
assert(ValNo < ValueNumberInfo.size());
if (ValueNumberInfo[ValNo].first < ~2U)
return ValueNumberInfo[ValNo].second;
return 0;
}
std::pair<unsigned, unsigned> getValNumInfo(unsigned ValNo) const {
assert(ValNo < ValueNumberInfo.size());
return ValueNumberInfo[ValNo];
}
/// setValueNumberInfo - Change the value number info for the specified
/// value number.
void setValueNumberInfo(unsigned ValNo,
const std::pair<unsigned, unsigned> &I){
ValueNumberInfo[ValNo] = I;
}
/// MergeValueNumberInto - This method is called when two value nubmers
@@ -216,7 +231,7 @@ namespace llvm {
/// the intervals are not joinable, this aborts.
void join(LiveInterval &Other, int *ValNoAssignments,
int *RHSValNoAssignments,
SmallVector<unsigned, 16> &NewInstDefiningValue);
SmallVector<std::pair<unsigned,unsigned>,16> &NewValueNumberInfo);
/// removeRange - Remove the specified range from this interval. Note that