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Remove support for 'CompositeIndices' and sub-register cycles.
Now that the weird X86 sub_ss and sub_sd sub-register indexes are gone, there is no longer a need for the CompositeIndices construct in .td files. Sub-register index composition can be specified on the SubRegIndex itself using the ComposedOf field. Also enforce unique names for sub-registers in TableGen. The same sub-register cannot be available with multiple sub-register indexes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160842 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -64,18 +64,6 @@ class Register<string n, list<string> altNames = []> {
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// register.
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list<RegAltNameIndex> RegAltNameIndices = [];
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// CompositeIndices - Specify subreg indices that don't correspond directly to
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// a register in SubRegs and are not inherited. The following formats are
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// supported:
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//
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// (a) Identity - Reg:a == Reg
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// (a b) Alias - Reg:a == Reg:b
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// (a b,c) Composite - Reg:a == (Reg:b):c
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//
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// This can be used to disambiguate a sub-sub-register that exists in more
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// than one subregister and other weird stuff.
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list<dag> CompositeIndices = [];
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// DwarfNumbers - Numbers used internally by gcc/gdb to identify the register.
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// These values can be determined by locating the <target>.h file in the
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// directory llvmgcc/gcc/config/<target>/ and looking for REGISTER_NAMES. The
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@@ -252,9 +240,6 @@ class RegisterTuples<list<SubRegIndex> Indices, list<dag> Regs> {
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// SubRegIndices - N SubRegIndex instances. This provides the names of the
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// sub-registers in the synthesized super-registers.
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list<SubRegIndex> SubRegIndices = Indices;
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// Compose sub-register indices like in a normal Register.
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list<dag> CompositeIndices = [];
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}
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