diff options
Diffstat (limited to 'llvm/lib/Target/Target.td')
| -rw-r--r-- | llvm/lib/Target/Target.td | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/llvm/lib/Target/Target.td b/llvm/lib/Target/Target.td index 725d3bd47a2..d1f3e7455b2 100644 --- a/llvm/lib/Target/Target.td +++ b/llvm/lib/Target/Target.td @@ -43,12 +43,11 @@ def isVoid : ValueType<0 , 11>; // Produces no value // description classes in llvm/Target/MRegisterInfo.h -// Register - You should define one instance of this class for each register in -// the target machine. -// -class Register { +// Register - You should define one instance of this class for each register +// in the target machine. String n will become the "name" of the register. +class RegisterBase<string n> { string Namespace = ""; - string Name = ""; + string Name = n; // SpillSize - If this value is set to a non-zero value, it is the size in // bits of the spill slot required to hold this register. If this value is @@ -62,21 +61,17 @@ class Register { int SpillAlignment = 0; } -// NamedReg - If the name for the 'def' of the register should not become the -// "name" of the register, you can use this to specify a custom name instead. -// -class NamedReg<string n> : Register { - let Name = n; +class Register<string n> : RegisterBase<n> { + list<RegisterBase> Aliases = []; } -// RegisterAliases - You should define instances of this class to indicate which -// registers in the register file are aliased together. This allows the code -// generator to be careful not to put two values with overlapping live ranges -// into registers which alias. -// -class RegisterAliases<Register reg, list<Register> aliases> { - Register Reg = reg; - list<Register> Aliases = aliases; +// RegisterGroup - This can be used to define instances of Register which +// need to specify aliases. +// List "aliases" specifies which registers are aliased to this one. This +// allows the code generator to be careful not to put two values with +// overlapping live ranges into registers which alias. +class RegisterGroup<string n, list<Register> aliases> : Register<n> { + let Aliases = aliases; } // RegisterClass - Now that all of the registers are defined, and aliases |
