[Bug target/31028] New: Microoptimization of the i386 and x86_64 compilers

[michael dot meissner at amd dot com]

There are a lot of feature test macros in the i386/x86_64 compiler of the form:
(x86_some_var & (1 << ix86_arch))

These tests could be micro-optimized, either by storing 1 << ix86_arch into a
global variable, or by having a global variable that is the result of the and
and the shift, so that a simple != 0 can be done.


-- 
           Summary: Microoptimization of the i386 and x86_64 compilers
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: michael dot meissner at amd dot com
 GCC build triplet: x86_64-pc-gnu-linux
  GCC host triplet: x86_64-pc-gnu-linux
GCC target triplet: x86_64-pc-gnu-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31028