re PR rtl-optimization/81443 (build/genrecog.o: virtual memory exhausted: Cannot allocate memory)
PR rtl-optimization/81443 * rtlanal.c (num_sign_bit_copies1) <SUBREG>: Do not propagate results from inner REGs to paradoxical SUBREGs. From-SVN: r256998
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2018-01-23 Eric Botcazou <ebotcazou@adacore.com>
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PR rtl-optimization/81443
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* rtlanal.c (num_sign_bit_copies1) <SUBREG>: Do not propagate results
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from inner REGs to paradoxical SUBREGs.
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2018-01-21 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
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Backport from mainline
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@ -4976,7 +4976,7 @@ num_sign_bit_copies1 (const_rtx x, machine_mode mode, const_rtx known_x,
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if (WORD_REGISTER_OPERATIONS
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&& load_extend_op (inner_mode) == SIGN_EXTEND
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&& paradoxical_subreg_p (x)
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&& (MEM_P (SUBREG_REG (x)) || REG_P (SUBREG_REG (x))))
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&& MEM_P (SUBREG_REG (x)))
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return cached_num_sign_bit_copies (SUBREG_REG (x), mode,
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known_x, known_mode, known_ret);
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break;
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