diff options
Diffstat (limited to 'include/llvm/Target/Target.td')
| -rw-r--r-- | include/llvm/Target/Target.td | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td index 9e0ad6f9e5..ca551e586a 100644 --- a/include/llvm/Target/Target.td +++ b/include/llvm/Target/Target.td @@ -54,6 +54,23 @@ class Register<string n> { // not [AX, AH, AL]. list<Register> SubRegs = []; + // SubRegIndices - For each register in SubRegs, specify the SubRegIndex used + // to address it. Sub-sub-register indices are automatically inherited from + // SubRegs. + list<SubRegIndex> SubRegIndices = []; + + // CompositeIndices - Specify subreg indices that don't correspond directly to + // a register in SubRegs and are not inherited. The following formats are + // supported: + // + // (a) Identity - Reg:a == Reg + // (a b) Alias - Reg:a == Reg:b + // (a b,c) Composite - Reg:a == (Reg:b):c + // + // This can be used to disambiguate a sub-sub-register that exists in more + // than one subregister and other weird stuff. + list<dag> CompositeIndices = []; + // DwarfNumbers - Numbers used internally by gcc/gdb to identify the register. // These values can be determined by locating the <target>.h file in the // directory llvmgcc/gcc/config/<target>/ and looking for REGISTER_NAMES. The @@ -73,17 +90,6 @@ class RegisterWithSubRegs<string n, list<Register> subregs> : Register<n> { let SubRegs = subregs; } -// SubRegSet - This can be used to define a specific mapping of registers to -// indices, for use as named subregs of a particular physical register. Each -// register in 'subregs' becomes an addressable subregister at index 'n' of the -// corresponding register in 'regs'. -class SubRegSet<SubRegIndex n, list<Register> regs, list<Register> subregs> { - SubRegIndex Index = n; - - list<Register> From = regs; - list<Register> To = subregs; -} - // RegisterClass - Now that all of the registers are defined, and aliases // between registers are defined, specify which registers belong to which // register classes. This also defines the default allocation order of |