-qinlglue

Category

Object code control

Purpose

When used with -O2 or higher optimization, inlines glue code that optimizes external function calls in your application.

Glue code, generated by the linker, is used for passing control between two external functions. When -qinlglue is in effect, the optimizer inlines glue code for better performance. When -qnoinlglue is in effect, inlining of glue code is prevented.

Defaults

• -qnoinlglue when -q32 is in effect
• -qinlglue when -q64 is in effect
• -qinlglue when -qtune=pwr4 and above, -qtune=ppc970, -qtune=auto, or -qtune=balanced is in effect.

Usage

If you use the -qtune option with any of the suboptions that imply -qinlglue and you want to disable inlining of glue code, make sure to specify -qnoinlglue as well.

Inlining glue code can cause the code size to grow. Specifying -qcompact overrides the -qinlglue setting to prevent code growth. If you want -qinlglue to be enabled, do not specify -qcompact.

Specifying -qnoinlglue or -qcompact can degrade performance; use these options with discretion.

Related information

• -q64
• -qcompact
• -qtune

• Inlining
• Managing code size