strict_induction

Option Type	Default Value	#pragma options	C	C++
-qoption	See below.	-	x	x

Syntax

    -qstrict_induction | -qstrict_induc | -qnostrict_induction -qnostrict_induc

Purpose 
Setting -qstrict_induction disables loop induction variable optimizations that have the potential to alter the semantics of your program. Such optimizations can change the result of a program if truncation or sign extension of a loop induction variable should occur as a result of variable
overflow or wrap-around.

Notes This option affects only loops which have an induction (loop counter) variable declared as a different size than a register. The most probable incidence of such a situation will likely involve
using 32-bit loop counters (int or unsigned int) when compiling in 64-bit mode. Unless you intend
such variables to overflow or wrap around, use -qnostrict_induction.

Using -qstrict_induction can cause considerable performance degradation. However, the option
may be useful for debugging a program sensitive to variable overflow or wrap-around.

Default

-qstrict_induction with optimization level 0, or when using c89 compiler invocation mode.
-qnostrict_induction otherwise.

Compiler Modes

List of Compiler Options and Their Defaults
strict Compiler Option