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Diffstat (limited to 'gcc/doc/passes.texi')
| -rw-r--r-- | gcc/doc/passes.texi | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/gcc/doc/passes.texi b/gcc/doc/passes.texi index d8e4315..073f899 100644 --- a/gcc/doc/passes.texi +++ b/gcc/doc/passes.texi @@ -124,13 +124,45 @@ true, then we expand them using either @code{expand_array_notation_exprs} or inside conditions, they are transformed using the function @code{fix_conditional_array_notations}. The C language-specific routines are located in @file{c/c-array-notation.c} and the equivalent C++ routines are in -file @file{cp/cp-array-notation.c}. Common routines such as functions to -initialize builtin functions are stored in @file{array-notation-common.c}. +the file @file{cp/cp-array-notation.c}. Common routines such as functions to +initialize built-in functions are stored in @file{array-notation-common.c}. + +@item Cilk keywords: +@itemize @bullet +@item @code{_Cilk_spawn}: +The @code{_Cilk_spawn} keyword is parsed and the function it contains is marked +as a spawning function. The spawning function is called the spawner. At +the end of the parsing phase, appropriate built-in functions are +added to the spawner that are defined in the Cilk runtime. The appropriate +locations of these functions, and the internal structures are detailed in +@code{cilk_init_builtins} in the file @file{cilk-common.c}. The pointers to +Cilk functions and fields of internal structures are described +in @file{cilk.h}. The built-in functions are described in +@file{cilk-builtins.def}. + +During gimplification, a new "spawn-helper" function is created. +The spawned function is replaced with a spawn helper function in the spawner. +The spawned function-call is moved into the spawn helper. The main function +that does these transformations is @code{gimplify_cilk_spawn} in +@file{c-family/cilk.c}. In the spawn-helper, the gimplification function +@code{gimplify_call_expr}, inserts a function call @code{__cilkrts_detach}. +This function is expanded by @code{builtin_expand_cilk_detach} located in +@file{c-family/cilk.c}. + +@item @code{_Cilk_sync}: +@code{_Cilk_sync} is parsed like a keyword. During gimplification, +the function @code{gimplify_cilk_sync} in @file{c-family/cilk.c}, will replace +this keyword with a set of functions that are stored in the Cilk runtime. +One of the internal functions inserted during gimplification, +@code{__cilkrts_pop_frame} must be expanded by the compiler and is +done by @code{builtin_expand_cilk_pop_frame} in @file{cilk-common.c}. + +@end itemize @end itemize -Detailed information about Cilk Plus and language specification is provided in -@w{@uref{http://www.cilkplus.org/}}. It is worth mentioning that the current -implementation follows ABI 0.9. +Documentation about Cilk Plus and language specification is provided under the +"Learn" section in @w{@uref{http://www.cilkplus.org/}}. It is worth mentioning +that the current implementation follows ABI 1.1. @node Gimplification pass @section Gimplification pass |