[Bug math/15367] New: Let gcc use __builtin_isinf

["marc.glisse at normalesup dot org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15367

             Bug #: 15367
           Summary: Let gcc use __builtin_isinf
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: marc.glisse@normalesup.org
    Classification: Unclassified


Hello,

gcc has had __builtin_isinf for a while now, but not __builtin___isinf.
However, math.h defines a macro that replaces isinf with __isinf and thus
prevents gcc from inlining its implementation. I thus get better code with
(isinf)(d) than isinf(d), because it inhibits the macro expansion.

Could the macro be changed, or do we have to add __builtin___isinf to gcc?

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