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Implement semantic checking for __builtin_signbit.

Description

Implement semantic checking for __builtin_signbit.

r242675 changed the signature for the signbit builtin but did not introduce proper semantic checking to ensure the arguments are as-expected. This patch groups the signbit builtin along with the other fp classification builtins. Fixes PR28172.

Details

Committed
aaronballmanJun 19 2018, 7:59 AM
Parents
rL335049: Reverting due to line ending changes; will reapply after addressing that.
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