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Split SimpleConstantVal up into its components, so each Constant subclass gets

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a different enum value.  This allows 'classof' for these to be really simple,
not needing to call getType() anymore.

This speeds up isa/dyncast/etc for constants, and also makes them smaller.
For example, the text section of a release build of InstCombine.cpp shrinks
from 230037 bytes to 216363 bytes, a 6% reduction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23466 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-09-27 06:08:32 +00:00
parent a9ec8ab32b
commit 225e8dd2f5
3 changed files with 32 additions and 35 deletions
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21
include/llvm/Value.h
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@ -146,8 +146,19 @@ public:
UndefValueVal, // This is an instance of UndefValue
ConstantExprVal, // This is an instance of ConstantExpr
ConstantAggregateZeroVal, // This is an instance of ConstantAggregateNull
SimpleConstantVal, // This is some other type of Constant
ConstantBoolVal, // This is an instance of ConstantBool
ConstantSIntVal, // This is an instance of ConstantSInt
ConstantUIntVal, // This is an instance of ConstantUInt
ConstantFPVal, // This is an instance of ConstantFP
ConstantArrayVal, // This is an instance of ConstantArray
ConstantStructVal, // This is an instance of ConstantStruct
ConstantPackedVal, // This is an instance of ConstantPacked
ConstantPointerNullVal, // This is an instance of ConstantPointerNull
InstructionVal, // This is an instance of Instruction
// Markers:
ConstantFirstVal = FunctionVal,
ConstantLastVal = ConstantPointerNullVal,
};
unsigned getValueType() const {
return SubclassID;
@ -194,12 +205,8 @@ void Use::set(Value *V) {
// the subtype header files to test to see if the value is a subclass...
//
template <> inline bool isa_impl<Constant, Value>(const Value &Val) {
return Val.getValueType() == Value::SimpleConstantVal ||
Val.getValueType() == Value::FunctionVal ||
Val.getValueType() == Value::GlobalVariableVal ||
Val.getValueType() == Value::ConstantExprVal ||
Val.getValueType() == Value::ConstantAggregateZeroVal ||
Val.getValueType() == Value::UndefValueVal;
return Val.getValueType() >= Value::ConstantFirstVal &&
Val.getValueType() <= Value::ConstantLastVal;
}
template <> inline bool isa_impl<Argument, Value>(const Value &Val) {
return Val.getValueType() == Value::ArgumentVal;