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This article introduces you how to understand Wind River Diab, the content is very detailed, interested friends can use for reference, hope to be helpful to you.

The Wind River Diab compiler is an operating system-independent tool suite that includes C _ compiler, assembler, linker, instruction-set simulator, ANSI C and C++ function libraries (library). Wind River Diab compiler is designed based on DIAB compiler technology, which is widely used in a variety of applications with very strict requirements and responsible for performing key tasks. There are a large number of application examples in industrial automation, national defense aviation, automobile internal control and other related systems.

The Diab compiler suite includes high-performance C and C++ tools that provide state-of-the-art optimization techniques to quickly create more reliable code. Diab compilers and other tools have faster execution and provide built-in customizable detection capabilities that can be used to detect code problems earlier. Through the powerful linker, the code and data in memory can be better organized, and hundreds of command line options and compilation instructions can be provided to meet the customization needs of software projects on any device. Special options are also provided for compatibility with other tools and code migration.

Important compiler features and extensions

■ has a large number of compiler controls and options to make compiler operations and code generation more flexible

A large number of functions and extensions of ■ for embedded device developers

■ customized optimizations and features for each processor of the x86 series

■ 's extensive compile-time checks to detect suspicious and non-portable structures

■ 's strong analytical ability to locate code bottlenecks. The analysis information can also be automatically used as feedback to the compiler for more positive optimization.

■ C++ template, exception, and runtime type information

High performance optimization

A variety of optimizations, some of which are unique to the Diab compiler, can produce faster and more compact code. Special optimizations include excellent inter-process register allocation, inlining, and reachability analysis. Optimization is divided into three categories: local, function level and program level.

Local optimization within ■ code block

Constant folding Constant folding

Divisible optimization Integer divide optimization

Local common subexpression eliminates Local common sub-expression elimination

Local strength reduction Local strength reduction

Convert Minor transformations slightly

Peephole optimized Peep-hole optimizations

Switch optimized Switch optimizations

Global Optimization in ■ function

Automatic increment / decrement optimization Auto increment/decrement optimizations

Automatic register allocation Automatic register allocation

Complex branch optimization Complex branch optimization

Conditional Code Optimization Condition code optimization

Constant propagation Constant propagation

Dead code cancellation Dead code elimination

Delayed branch optimization Delayed branches optimization

Delay register saves Delayed register saving

Entry and exit code eliminates Entry/exit code removal

Extended optimized Extend optimization

Global common subexpression eliminates Global common sub-expression elimination

Global variable storage latency Global variable store delay

Life cycle Analysis (Coloring) Lifetime analysis (coloring)

Link register optimization Link register optimization

Cyclic countdown to optimize Loop count-down optimization

Loop invariant code mobile Loop invariant code motion

Optimizing Loop statics optimization with cyclic static variables

Cycle strength reduction Loop strength reduction

Loop unfold Loop unrolling

Memory read and write optimized Memory read/write optimizations

Reorder code scheduling Reordering code scheduling

Restart optimized Restart optimization

Branched chain optimization Branch-chain optimization

Spatial optimization Space optimization

Split optimized Split optimization

Register structure and bit domain member Structure and bit-field member to registers

Tail recursive Tail recursion

Tail Challenge Optimization Tail jump optimization

No variable propagation Undefined variable propagation is defined

Delete Unused assignment deletion without using assignment

Variable location optimization Variable location optimization

Variable propagation Variable propagation

Global optimization between ■ functions

Parameter address optimization Argument address optimization

Function inline Function inlining

Optimization of Glue function optimization by bonding function

Inter-program optimization Interprocedural optimizations

Optimized Literal synthesis optimization for text synthesis

Local data area optimization Local data area optimization

Analysis and feedback optimization of Profiling feedback optimization

Transplantability

The ■ compiler implements the ANSI C++ standard (ISO/IEC FDIS 14882), including exceptions, templates, and runtime type information (RTTI)

■ for C modules, the compiler is fully compliant with the ANSI X3.159-1989 standard (that is, ANSI C), with extensions compatible with other compilers to simplify the migration of Legacy code

■ standard C programs can be compiled with the strict ANSI option, which turns off extensions and simplifies the language to the standard core. Alternatively, you can use extensions to gradually upgrade the program as needed

■ produces exactly the same binary output, independent of the Host platform

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