GIMPLE is a family of intermediate representations (IR) based on the tree data structure. At present, there are only two kinds of GIMPLE: High level GIMPLE is what the middle-end produces when it lowers the GENERIC language that is targeted by all the language front ends.

GIMPLE is a three-address representation derived from GENERIC by breaking down GENERIC expressions into tuples of no more than 3 operands (with some exceptions like function calls). GIMPLE was heavily influenced by the SIMPLE IL used by the McCAT compiler project at McGill University, though we have made some different choices.

2016年11月25日 · Most production compilers have been using this design since 1990-s. In pre-Clang times LLVM IR was even generated directly from GIMPLE via a GCC plugin. Main advantages of LLVM IR are that it's less tightly bound to compiler implementation, more formally defined and has nicer C++ API.

Return the basic block to which statement G belongs to. Return the lexical scope block holding statement G. Return the tree code for the expression computed by STMT. This is only meaningful for GIMPLE_CALL, GIMPLE_ASSIGN and GIMPLE_COND. If STMT is GIMPLE_CALL, it will return CALL_EXPR.

Scott Gimple is an American television writer who serves as a writer and producer of AMC's The Walking Dead. He was the Showrunner from Season 4 to Season 8. He is currently the Chief Content Officer of the franchise.

Scott M. Gimple (born March 29, 1971) [1] is an American writer for both comics and television. He is known for his work as a writer and producer for Fillmore!, Life, FlashForward, Chase, and The Walking Dead, and served as showrunner for The Walking Dead from seasons 4 through 8 and for the spin-off The Walking Dead: The Ones Who Live.

A Gimple representation of input function is a “tree” of nodes. It corresponds to a linearised control flow representation of the AST/Generic tree and hence actually is more of a linear list of “tree” nodes. A Gimple node is represented using the following (annotated) structure in the file $GCCHOME/gcc/tree.h:

It is now possible, since GCC 7, to use __GIMPLE in a function's declaration specifiers, along with the -fgimple command-line flag, to have GCC directly compile GIMPLE. This is explained in more detail in the documentation for GCCs internals

2019年7月18日 · High GIMPLE contains some container statements like lexical scopes (represented by GIMPLE_BIND) and nested expressions (e.g., GIMPLE_TRY). Low GIMPLE exposes all of the implicit jumps for control and exception expressions directly in the IL and EH region trees(EH means Exception Handling).

2011年6月2日 · GIMPLE is the machine-independent intermediate representation used in modern GCC releases (post version 4.0). While the GIMPLE API for code generation and manipulation has matured over time, the corresponding textual representation is yet to be in a stable form. This issue hampers many serious efforts for code generation from and to GIMPLE.