Developer Guide and Reference

Contents

New Options

This topic lists the options or option settings that provide new functionality in this release.
If no label appears, the option is available on all supported systems.
If "only" appears in the label, the option is only available on the identified system.
For more details on the options, refer to the individual option descriptions.
For information on conventions used in this table, see Notational Conventions .
New compiler options or option settings are listed in tables below:
  • The first table lists new options or option settings that are available on Windows* systems.
  • The second table lists new options or option settings that are available on Linux* and
    macOS*
    systems. If an option is only available on one of these operating systems, it is labeled.
Windows* Options
Description
Default
/Qauto-arch
Tells the compiler to generate multiple, feature-specific auto-dispatch code paths for x86 architecture processors if there is a performance benefit.
OFF
/Qconditional-branch
=
keyword
Lets you identify and fix code that may be vulnerable to speculative execution side-channel attacks, which can leak your secure data as a result of bad speculation of a conditional branch direction.
/Qconditional-branch:keep
/Qopt-multiple-gather-scatter-by-shuffles[-]
Enables or disables the optimization for multiple adjacent gather/scatter type vector memory references.
varies; see the option description
/Qpar-loops
Lets you select between old or new implementations of parallel loop support.