Testsuite and constant-folding?
Joseph S. Myers
joseph@codesourcery.com
Fri Jan 5 19:43:00 GMT 2007
On Fri, 5 Jan 2007, Brooks Moses wrote:
> (3) How do GCC testsuites other than the Fortran one handle this issue?
Using volatile variables is one way to ensure that an built-in function
doesn't get evaluated to a constant at compile time. See for example
gcc.c-torture/execute/builtins/complex-1.c. In practice non-volatile
non-const non-static global variables will also do the job, see e.g.
gcc.dg/builtin-bswap-4.c.
--
Joseph S. Myers
joseph@codesourcery.com
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