6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-13 04:38:24 +00:00
Code Issues Projects Releases Wiki Activity

For PR1064:

Browse Source 
Implement the arbitrary bit-width integer feature. The feature allows
integers of any bitwidth (up to 64) to be defined instead of just 1, 8,
16, 32, and 64 bit integers.

This change does several things:
1. Introduces a new Derived Type, IntegerType, to represent the number of
   bits in an integer. The Type classes SubclassData field is used to
   store the number of bits. This allows 2^23 bits in an integer type.
2. Removes the five integer Type::TypeID values for the 1, 8, 16, 32 and
   64-bit integers. These are replaced with just IntegerType which is not
   a primitive any more.
3. Adjust the rest of LLVM to account for this change.

Note that while this incremental change lays the foundation for arbitrary
bit-width integers, LLVM has not yet been converted to actually deal with
them in any significant way. Most optimization passes, for example, will
still only deal with the byte-width integer types.  Future increments
will rectify this situation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33113 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2007-01-12 07:05:14 +00:00
parent ed30989895
commit a54b7cbd45
41 changed files with 4035 additions and 3394 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
lib/Target/TargetData.cpp
View File

@ -241,12 +241,21 @@ static inline void getTypeInfo(const Type *Ty, const TargetData *TD,
uint64_t &Size, unsigned char &Alignment) {
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
case Type::Int1TyID: Size = 1; Alignment = TD->getBoolAlignment(); return;
case Type::VoidTyID:
case Type::Int8TyID: Size = 1; Alignment = TD->getByteAlignment(); return;
case Type::Int16TyID: Size = 2; Alignment = TD->getShortAlignment(); return;
case Type::Int32TyID: Size = 4; Alignment = TD->getIntAlignment(); return;
case Type::Int64TyID: Size = 8; Alignment = TD->getLongAlignment(); return;
case Type::IntegerTyID: {
unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
if (BitWidth <= 8) {
Size = 1; Alignment = TD->getByteAlignment();
} else if (BitWidth <= 16) {
Size = 2; Alignment = TD->getShortAlignment();
} else if (BitWidth <= 32) {
Size = 4; Alignment = TD->getIntAlignment();
} else if (BitWidth <= 64) {
Size = 8; Alignment = TD->getLongAlignment();
} else
assert(0 && "Integer types > 64 bits not supported.");
return;
}
case Type::VoidTyID: Size = 1; Alignment = TD->getByteAlignment(); return;
case Type::FloatTyID: Size = 4; Alignment = TD->getFloatAlignment(); return;
case Type::DoubleTyID: Size = 8; Alignment = TD->getDoubleAlignment(); return;
case Type::LabelTyID: