[Bug target/19069] New: [x86][amd64] Could have better initial RTL generation for MIN/MAX

[steven at gcc dot gnu dot org]

We could have define_expand patterns in i386.md to generate better 
initial RTL for expanding MIN_EXPR and MAX_EXPR, using a mov and a 
cmov.  Perhaps in the pre-tree-ssa era this wasn't profitable, but 
now we could expand to almost optimal code without branches, after 
having optimized so much on trees already. 
 
I'll experiment a bit with this idea for GCC 4.1.

-- 
           Summary: [x86][amd64] Could have better initial RTL generation
                    for MIN/MAX
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: steven at gcc dot gnu dot org
        ReportedBy: steven at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19069