[TblGen] Extend !if semantics through new feature !cond
This patch extends TableGen language with !cond operator.
Instead of embedding !if inside !if which can get cumbersome,
one can now use !cond.
Below is an example to convert an integer 'x' into a string:
!cond(!lt(x,0) : "Negative",
!eq(x,0) : "Zero",
!eq(x,1) : "One,
1 : "MoreThanOne")
Reviewed By: hfinkel, simon_tatham, greened
Differential Revision: https://reviews.llvm.org/D55758
llvm-svn: 352185
diff --git a/llvm/lib/TableGen/TGParser.h b/llvm/lib/TableGen/TGParser.h
index 11d6100..38b7824 100644
--- a/llvm/lib/TableGen/TGParser.h
+++ b/llvm/lib/TableGen/TGParser.h
@@ -193,6 +193,7 @@
bool ParseRangePiece(SmallVectorImpl<unsigned> &Ranges);
RecTy *ParseType();
Init *ParseOperation(Record *CurRec, RecTy *ItemType);
+ Init *ParseOperationCond(Record *CurRec, RecTy *ItemType);
RecTy *ParseOperatorType();
Init *ParseObjectName(MultiClass *CurMultiClass);
Record *ParseClassID();