...which was failing on *-elf. This test is making sure that we narrow
maths calls, e.g. sinh -> sinhf, but we can only do that if we know that
the target has a full c99 libm or if we have other proof that the function
we want to generate is available.
Tested on aarch64-none-elf (where it's skipped) and aarch64-linux-gnu
(where it isn't).
gcc/testsuite/
* gcc.dg/torture/builtin-convert-1.c: Require c99_runtime.
From-SVN: r229548
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