User's Guide

This pragma informs the compiler that the specified functions may enable floating-point trap
handling. When the compiler is so informed, it will not perform loop invariant code motion (LICM)
on floating-point operations in the functions named in the pragma. This pragma is required for
proper code generation when floating-point traps are enabled.
NOTE: This pragma is not supported in C++. It is deprecated for HP C and C++ C-mode. You
should use#pragma STDC FENV_ACCESS ON instead.
For example,
#pragma FLOAT_TRAPS_ON xyz,abc
informs the compiler and optimizer that xyz and abc have floating-point traps turned on and
therefore LICM optimization should not be performed. A dummy name _ALL represents all functions.
[NO]INLINE Pragma
#pragma [NO]INLINE sym[,sym]
The [NO]INLINE pragma enables[disables] inlining for all functions or specified function names.
For example, to specify inlining of the two subprograms checkstat and getinput, use:
#pragma INLINE checkstat, getinput
To specify that an infrequently called routine (opendb, for example) should not be inlined when
compiling at optimization level 3 or 4, use:
#pragma NOINLINE opendb
Usage Notes for C++:
• Use the unmangled name of the function.
• All overloaded versions of the function will be affected.
• The pragma can affect "inline functions"---class member functions defined in the class definition;
these have the same treatment as functions declared with the inline keyword.
Usage Notes for both C and C++:
• The pragma can be used without a function name, in which case it affects all functions until
the next instance of the pragma or the end of the module. Consider the following:
#pragma NOINLINE foo
#pragma INLINE
[foo will be inlined here]
• Inline functions (those declared with the inline keyword or as described above for C++),
can be affected by #pragma NOLINLINE, which overrides the keyword.
• The inline keyword indicates a recommendation to the compiler that the function be inlined;
the compiler can then make a profitability decision whether or not to perform the inlining.
• The [NO]INLINE pragma and +O[no]inlineoption are treated as directives to the compiler;
the compiler obeys the pragma or option without performing profitability analysis.
• There are some cases that are not valid to inline. In these cases, the pragma or option is
silently ignored.
NO_INLINE Pragma
#pragma NO_INLINE
This is equivalent to #pragma NOINLINE. The NO_INLINE pragma disables inlining for all
functions or specified function names.
104 Pragma Directives and Attributes