–fast

Selects a combination of compilation options for optimum execution speed for some programs. 

-fma

(SPARC) Enables automatic generation of floating-point, fused, multiply-add instructions. 

-g

Instructs both the compiler and the linker to prepare the program for performance analysis (and for debugging). 

–s

Strips the symbol table out of the executable. 

-m32|-m64

Specifies the memory model for the compiled binary object. 

-xalias_level

Enables the compiler to perform type-based alias analysis and optimizations. 

–xarch=isa

Specifies target architecture instruction set. 

-xbinopt

Prepares the binary for later optimizations, transformations and analysis. 

-xbuiltin[=opt]

Enables or disables better optimization of standard library calls 

–xcache=c

(SPARC) Defines target cache properties for the optimizer. 

–xcg89

Compiles for generic SPARC architecture. 

–xcg92

Compiles for SPARC V8 architecture. 

–xchip=c

Specifies target processor chip. 

–xF

Enables linker reordering of functions and variables. 

-xinline=flst

Specifies which user-written routines can be inlined by the optimizer 

-xipo

Performs interprocedural optimizations. 

–xlibmil

Inlines selected libm library routines for optimization.

–xlibmopt

Uses a library of optimized math routines. 

–xlinkopt

(SPARC) Performs link-time optimization on the resulting executable or dynamic library over and above any optimizations in the object files. 

–xmemalign=ab

(SPARC) Specify maximum assumed memory alignment and behavior of misaligned data accesses. 

–xnolibmil

Cancels– xlibmil on the command line.

–xnolibmopt

Does not use the math routine library. 

–xOlevel

Specifies optimization level to level.

–xpagesize

Sets the preferred page size for the stack and the heap. 

-xpagesize_heap

Sets the preferred page size for the heap. 

-xpagesize_stack

Sets the preferred page size for the stack. 

-xprefetch[=lst]

(SPARC) Enables prefetch instructions on architectures that support prefetch. 

-xprefetch_level

Control the aggressiveness of automatic insertion of prefetch instructions as set by -xprefetch=auto

–xprofile

(SPARC) Collects or optimizes using runtime profiling data. 

–xregs=rlst

(SPARC) Controls scratch register use. 

–xsafe=mem

(SPARC) Allows no memory-based traps. 

–xspace

(SPARC) Does not allow optimizations that increase code size. 

–xtarget=t

Specifies a target instruction set and optimization system. 

–xthreadvar

(SPARC) Changes the default thread-local storage access mode. 

–xunroll=n

Enables unrolling of loops where possible. 

–xvis

(SPARC) Enables compiler recognition of the assembly-language templates defined in the VIS^TM instruction set