rs6000: Fix a mistake in cstore_si_as_di (PR68865, PR68879)
convert_move does not know how to zero-extend a constant integer to the target mode -- simply because it does not know the source mode. As a result, 32-bit SImode with the high bit set would be effectively sign- extended instead of zero-extended. This patch fixes it. PR target/68865 PR target/68879 * config/rs6000/rs6000.md (cstore_si_as_di): Force all operands into registers. From-SVN: r231621
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