Wind River Diab Compiler - Embedded Tools GmbH

Wind River Diab CompilerRelease Notes, 5.9.3All architectures.Whole Program Optimizationdctrl UtilityAPIsDocumentationThe whole program optimization (WPO) facility has been extended beyondinlining across modules. When -Xwhole-program-optim is used, the followingoptions are enabled by default:-Xwpo-inlineAllows calls to functions that are defined in different modules to be inlined.-Xwpo-constDetects global variables that have an initializer, but are never subsequentlywritten. Such variables are treated as constants, and references to them arereplaced by the initial value.-Xwpo-no-aliasDetects global variables that never have their address taken. This informationcan be used by the rest of the optimizer to remove redundant loads and stores.-Xwpo-delete-return-valueDetects global functions whose return values are never used, and optimizesthe functions by removing computations leading to the return statements.-Xwpo-deadRemoves (non-volatile) variables and functions that are not referenced in theprogram.The following option (which is not enabled by default) is also provided:-Xwpo-inline-single-callsFunctions that are only called once across the entire program are treated as ifthey were marked with __attribute__(("always_inline")), and, if possible,inlined regardless of their size, or the value of -Xinline.The logical pairs to these options (such as -Xno-wpo-inline) can be used to disablethe default options on an individual basis.For detailed information, see the Wind River Diab Compiler User’s Guide for yourarchitecture, and the Wind River Diab Compiler Options Reference.The dctrl utility now allows for selection of individual core targets in a multi-coreprocessor. It prompts the user to select a core when a multi-core target is selected.It also differentiates between cores and chips in the target option listing.__vector_table( )Used to specify assignment of an interrupt or trap function to a core vectortable. See also 6. Documentation Errata, p.13.Tricore only.The documentation set has been restructured to provide more modular andaccessible units of information. This has primarily involved moving sections of theWind River Diab Compiler User’s Guide into the following new documents:■Wind River Diab Compiler Options Reference8