Vbcc

"vbcc" is the name of a portable and retargetable ISO/ANSI C compiler.

It supports ISO C according to ISO/IEC 9899:1989 and a subset of the new standard ISO/IEC 9899:1999 (C99).

It is divided into two parts. One is target-independent and the other is target-dependent. vbcc provides complete abstraction of host-arithmetic and target-arithmetic. Therefore, it fully supports cross-compiling for 8, 16, 32 and 64bit architectures.

Embedded systems are supported by features like different pointer-sizes, ROM-able code, inline-assembly, bit-types, interrupt-handlers, section-attributes, stack-calculation and many others (depending on the backend).

vbcc provides a large set of high-level optimizations as well as target-specific optimizations to produce faster or smaller code. it is also able to optimize across functions and modules. Target-independent optimizations includes:

cross-module function-inlining
partial inlining of recursive functions
inter-procedural data-flow analysis
inter-procedural register-allocation
register-allocation for global variables
global common-subexpression-elimination
global constant-propagation
global copy-propagation
dead-code-elimination
alias-analysis
loop-unrolling
induction-variable elimination
loop-invariant code-motion
loop-reversal

Currently backends (with different degree of maturity) exist 68k, Coldfire, PowerPC 80x86 (386 and above), Alpha, C16x/ST10, 68hc12, z-machine architectures.

All common operating systems can be supported as host systems, including Windows and Unix/Linux systems.