+ESfic | Generates object code with fast indirect
calls. Only correct for programs not using shared libraries. | Run-time code is faster. |
| +ESconstlit | Stores constant-qualified (const)
objects and literals in read-only memory. | Data that is constant-qualified is easier to
fetch. Using this option results in improved performance in some
applications. |
+ESlit | Places string literals and constants
defined with the ANSI C const
type qualifier into read-only data storage. Storing to constants
with this option will cause segmentation violations. | Reduces memory requirements and improves
run-time speed in multi-user applications. Can improve data-cache
utilization. |
| +ESnolit | Disables the default behavior which causes
the HP C compiler to no longer store literals in read-only memory. | Allows you to specify that literals not be
placed in read-only memory. This is helpful with programs that violate
the semantics of const, which could
result in a core dump or bus error. |
+I,
+P | Enables all profile-based optimizations.
Uses execution profile data to identify the most frequently executed
code paths. Repositions functions, basic blocks, and aids other
optimizations according to these frequently executed paths. | Improves code locality and cache hit
rates. Improves efficiency of other optimizations. Benefits most
applications, especially large applications with multiple compilation
units. May be used at any optimization level. |
