Change @llvm.clear_cache default to call rt-lib

Description

Change @llvm.clear_cache default to call rt-lib

After some discussion on IRC, emitting a call to the library function seems
like a better default, since it will move from a compiler internal error to
a linker error, that the user can work around until LLVM is fixed.

I'm also adding a note on the responsibility of the user to confirm that
the cache was cleared on platforms where nothing is done.

Details

Auditors
dsanders
H39 MIPS Backend Audit Triggered Audit
Committed
rengolinMar 26 2014, 7:01 AM
Parents
rL204805: [mips] The decision to use MO_GOT_PAGE and MO_GOT_OFST depends on the ABI being…
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dsanders resigned from this audit.Mar 30 2014, 1:27 PM