-.. _lexicon:
-
================
The LLVM Lexicon
================
**ADCE**
Aggressive Dead Code Elimination
+**AST**
+ Abstract Syntax Tree.
+
+ Due to Clang's influence (mostly the fact that parsing and semantic
+ analysis are so intertwined for C and especially C++), the typical
+ working definition of AST in the LLVM community is roughly "the
+ compiler's first complete symbolic (as opposed to textual)
+ representation of an input program".
+ As such, an "AST" might be a more general graph instead of a "tree"
+ (consider the symbolic representation for the type of a typical "linked
+ list node"). This working definition is closer to what some authors
+ call an "annotated abstract syntax tree".
+
+ Consult your favorite compiler book or search engine for more details.
+
B
-
+.. _lexicon-bb-vectorization:
+
**BB Vectorization**
- Basic Block Vectorization
+ Basic-Block Vectorization
**BURS**
Bottom Up Rewriting System --- A method of instruction selection for code
**SCCP**
Sparse Conditional Constant Propagation
+**SLP**
+ Superword-Level Parallelism, same as :ref:`Basic-Block Vectorization
+ <lexicon-bb-vectorization>`.
+
**SRoA**
Scalar Replacement of Aggregates