de8d0e3992
Xtensa hwloop_optimize segfaults when zero overhead loop is about to be
inserted as the first instruction of the function.
Insert zero overhead loop instruction into new basic block before the
loop when basic block that precedes the loop is empty.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit
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| 4.9.4 | ||
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| 7.4.0 | ||
| 8.3.0 | ||
| arc-2018.09-release | ||
| gcc-final | ||
| gcc-initial | ||
| or1k-musl-5.4.0-20170218 | ||
| Config.in.host | ||
| gcc.hash | ||
| gcc.mk | ||