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DAG arguments can optionally be named:
(dag node, node:$name)
With this change, the node is also optional:
(dag node, node:$name, $name)
The missing node is treated as an UnsetInit, so the above is equivalent
to:
(dag node, node:$name, ?:$name)
This syntax is useful in output patterns where we currently require the
types of variables to be repeated:
def : Pat<(subc i32:$b, i32:$c), (SUBCCrr i32:$b, i32:$c)>;
This is preferable:
def : Pat<(subc i32:$b, i32:$c), (SUBCCrr $b, $c)>;
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177843 91177308-0d34-0410-b5e6-96231b3b80d8
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My "excuse" for not refactoring the grammar here is to not diverge too
far from the grammar in the comments of TGParser.cpp, since I'm not
taking on the quest of majorly refactoring TGParser.cpp at the moment.
One benefit of doing this is that Ideas for refactoring and clarifying
the grammar in this document should translate almost immediately to
beneficial refactorings that can be made to TGParser.cpp.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174144 91177308-0d34-0410-b5e6-96231b3b80d8
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Spotted by Eli Bendersky.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174143 91177308-0d34-0410-b5e6-96231b3b80d8
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This adds an !add(a, b) operator to tablegen; this will be used
to cleanup the PPC register definitions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173445 91177308-0d34-0410-b5e6-96231b3b80d8
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Now BangOperator should be nicely hyperlinked.
Pointed out by Joel Jones.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171942 91177308-0d34-0410-b5e6-96231b3b80d8
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Suggested by Joel Jones.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171941 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171940 91177308-0d34-0410-b5e6-96231b3b80d8
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It's not just def's but actually a limited subset of Object's that are
allowed inside a multiclass.
Spotted by Joel Jones.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171935 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171685 91177308-0d34-0410-b5e6-96231b3b80d8
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