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D.gnu - [Bug 206] New: Wrong gcc5 __builtin_OPNAME_overflow signatures.

Date: Sat, 9 Jan 2016 05:51:10 +0000
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http://bugzilla.gdcproject.org/show_bug.cgi?id=206

            Bug ID: 206
           Summary: Wrong gcc5 __builtin_OPNAME_overflow signatures.
           Product: GDC
           Version: development
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gdc
          Assignee: ibuclaw gdcproject.org
          Reporter: art.08.09 gmail.com

For example:

 import gcc.builtins;
 pragma(msg, typeof(__builtin_add_overflow));
-> pure nothrow nogc safe extern (C) bool() Which makes them unusable from D. --------------------------------------------- void bug() { int r; __builtin_add_overflow(1, 2, &r); } --------------------------------------------- -> error: function gcc.builtins.__builtin_add_overflow () is not callable using argument types (int, int, int*) They do work if the type is overridden; ie this hack works: trusted bool overflow(string OP, A, B, R)(A a, B b, R* r) { import gcc.builtins; auto baofp = cast(typeof(&overflow))&mixin("__builtin_"~OP~"_overflow"); return (*baofp)(a, b, r); } if (overflow!"add"(a, b, &r)) error(); -- You are receiving this mail because: You are watching all bug changes.
Jan 08