[PATCH][committed] aarch64: Add QI -> HI zero-extension for LDAPR

[Kyrylo Tkachov via Gcc-patches]

Hi all,

This patch is a straightforward extension of the zero-extending LDAPR pattern
to represent QI -> HI load-extends. This maps down to a LDAPRB-W instruction.
This lets us remove a redundant zero-extend in the new test function.

Bootstrapped and tested on aarch64-none-linux-gnu.
Pushing to trunk.

Thanks,
Kyrill

gcc/ChangeLog:

        * config/aarch64/atomics.md (*aarch64_atomic_load<ALLX:mode>_rcpc_zext):
        Use SD_HSDI for destination mode iterator.

gcc/testsuite/ChangeLog:

        * gcc.target/aarch64/ldapr-zext.c: Add test for u8 to u16 extension.

ldaprb.patch
Description: ldaprb.patch