x86 Parameters (GNU Compiler Collection (GCC) Internals)

#### 30.2.6 x86 Parameters ¶

The following choices of name are available on i386 and x86_64 targets:

`x86-stlf-window-ninsns` ¶

  Number of instructions above which STFL stall penalty can be compensated.

`x86-stv-max-visits` ¶

  The maximum number of use and def visits when discovering a STV chain before the discovery is aborted.

`ix86-vect-unroll-limit` ¶

  Limit how much the autovectorizer may unroll a loop.

`ix86-vect-compare-costs` ¶

  Whether x86 vectorizer cost modeling compares costs of different vector sizes.