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Make APValue profiling a little more compact.

This commit is contained in:
Richard Smith 2020-10-21 18:04:04 -07:00
parent 3b3aef198b
commit e04ba2bc05
1 changed files with 31 additions and 23 deletions
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54
clang/lib/AST/APValue.cpp
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@ -414,7 +414,18 @@ void APValue::swap(APValue &RHS) {
std::swap(Data, RHS.Data);
}
/// Profile the value of an APInt, excluding its bit-width.
static void profileIntValue(llvm::FoldingSetNodeID &ID, const llvm::APInt &V) {
for (unsigned I = 0, N = V.getBitWidth(); I < N; I += 32)
ID.AddInteger((uint32_t)V.extractBitsAsZExtValue(std::min(32u, N - I), I));
}
void APValue::Profile(llvm::FoldingSetNodeID &ID) const {
// Note that our profiling assumes that only APValues of the same type are
// ever compared. As a result, we don't consider collisions that could only
// happen if the types are different. (For example, structs with different
// numbers of members could profile the same.)
ID.AddInteger(Kind);
switch (Kind) {
@ -428,25 +439,22 @@ void APValue::Profile(llvm::FoldingSetNodeID &ID) const {
return;
case Struct:
ID.AddInteger(getStructNumBases());
for (unsigned I = 0, N = getStructNumBases(); I != N; ++I)
getStructBase(I).Profile(ID);
ID.AddInteger(getStructNumFields());
for (unsigned I = 0, N = getStructNumFields(); I != N; ++I)
getStructField(I).Profile(ID);
return;
case Union:
if (!getUnionField()) {
ID.AddPointer(nullptr);
ID.AddInteger(0);
return;
}
ID.AddPointer(getUnionField());
ID.AddInteger(getUnionField()->getFieldIndex() + 1);
getUnionValue().Profile(ID);
return;
case Array: {
ID.AddInteger(getArraySize());
if (getArraySize() == 0)
return;
@ -502,46 +510,46 @@ void APValue::Profile(llvm::FoldingSetNodeID &ID) const {
}
case Vector:
ID.AddInteger(getVectorLength());
for (unsigned I = 0, N = getVectorLength(); I != N; ++I)
getVectorElt(I).Profile(ID);
return;
case Int:
// We don't need to include the sign bit; it's implied by the type.
getInt().APInt::Profile(ID);
profileIntValue(ID, getInt());
return;
case Float:
getFloat().Profile(ID);
profileIntValue(ID, getFloat().bitcastToAPInt());
return;
case FixedPoint:
// We don't need to include the fixed-point semantics; they're
// implied by the type.
getFixedPoint().getValue().APInt::Profile(ID);
profileIntValue(ID, getFixedPoint().getValue());
return;
case ComplexFloat:
getComplexFloatReal().Profile(ID);
getComplexFloatImag().Profile(ID);
profileIntValue(ID, getComplexFloatReal().bitcastToAPInt());
profileIntValue(ID, getComplexFloatImag().bitcastToAPInt());
return;
case ComplexInt:
getComplexIntReal().APInt::Profile(ID);
getComplexIntImag().APInt::Profile(ID);
profileIntValue(ID, getComplexIntReal());
profileIntValue(ID, getComplexIntImag());
return;
case LValue:
getLValueBase().Profile(ID);
ID.AddInteger(getLValueOffset().getQuantity());
ID.AddInteger(isNullPointer());
ID.AddInteger(isLValueOnePastTheEnd());
// For uniqueness, we only need to profile the entries corresponding
// to union members, but we don't have the type here so we don't know
// how to interpret the entries.
for (LValuePathEntry E : getLValuePath())
E.Profile(ID);
ID.AddInteger((isNullPointer() ? 1 : 0) |
(isLValueOnePastTheEnd() ? 2 : 0) |
(hasLValuePath() ? 4 : 0));
if (hasLValuePath()) {
ID.AddInteger(getLValuePath().size());
// For uniqueness, we only need to profile the entries corresponding
// to union members, but we don't have the type here so we don't know
// how to interpret the entries.
for (LValuePathEntry E : getLValuePath())
E.Profile(ID);
}
return;
case MemberPointer: