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Make the register classes optionally take code fragments for allocation_order_*


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7441 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-07-30 22:16:41 +00:00
parent e3a1d05448
commit 0ad1361837
1 changed files with 19 additions and 1 deletions
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20
lib/Target/Target.td
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@ -10,7 +10,7 @@
//
// Value types - These values correspond to the register types defined in the
// ValueTypes.h file.
//
class ValueType { string Namespace = "MVT"; }
def i1 : ValueType; // One bit boolean value
@ -53,9 +53,27 @@ class RegisterAliases<Register reg, list<Register> aliases> {
// registers by register allocators.
//
class RegisterClass<ValueType regType, int alignment, list<Register> regList> {
// RegType - Specify the ValueType of the registers in this register class.
// Note that all registers in a register class must have the same ValueType.
//
ValueType RegType = regType;
// Alignment - Specify the alignment required of the registers when they are
// stored or loaded to memory.
//
int Alignment = alignment;
// MemberList - Specify which registers are in this class. If the
// allocation_order_* method are not specified, this also defines the order of
// allocation used by the register allocator.
//
list<Register> MemberList = regList;
// allocation_order_* - These methods define the order that the registers
// should be allocated. See the MRegister.h file for more information.
//
code allocation_order_begin;
code allocation_order_end;
}