Controls loop "unrolling" at runtime.

This pragma is compatible with the following platform targets:

68K

PowerPC

NEC V800

Intel x86

MIPS

Embedded 68K

When this pragma is on the compiler guesses the number of times to unroll a loop when the number of loop iterations is a runtime calculation instead of a constant value calculated at compile time.

This optimization is only applied when

• loop unrolling is turned on
• the loop iterator is a 32-bit value (int, long, unsigned int, unsigned long)
• there are no conditional statements in the loop body

Loop unrolling optimization is controlled by the opt_unroll_loops pragma. The default value is on when loop unrolling is turned on. To check whether this option is on, use __option (ppc_unroll_speculative), described in "Checking Options."