[TableGen] Introduce !listsplat 'binary' operator

Summary:
```
``!listsplat(a, size)``
    A list value that contains the value ``a`` ``size`` times.
    Example: ``!listsplat(0, 2)`` results in ``[0, 0]``.
```

I plan to use this in X86ScheduleBdVer2.td for LoadRes handling.

This is a little bit controversial because unlike every other binary operator
the types aren't identical.

Reviewers: stoklund, javed.absar, nhaehnle, craig.topper

Reviewed By: javed.absar

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60367

llvm-svn: 358117

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/TableGen/TGLexer.cpp b/llvm/lib/TableGen/TGLexer.cpp
index 9ffcc7ae5c7..b9420253b2b 100644
--- a/llvm/lib/TableGen/TGLexer.cpp
+++ b/llvm/lib/TableGen/TGLexer.cpp
@@ -564,6 +564,7 @@ tgtok::TokKind TGLexer::LexExclaim() {
     .Case("foldl", tgtok::XFoldl)
     .Case("foreach", tgtok::XForEach)
     .Case("listconcat", tgtok::XListConcat)
+    .Case("listsplat", tgtok::XListSplat)
     .Case("strconcat", tgtok::XStrConcat)
     .Default(tgtok::Error);