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gcc/ PR rtl-optimization/34998 * global.c (build_insn_chain): Treat non-subreg_lowpart SUBREGs of pseudos as clobbering all the words covered by the SUBREG, not just all the bytes. * ra-conflict.c (clear_reg_in_live): Likewise. Take the original df_ref rather than an extract parameter. (global_conflicts): Update call accordingly. From-SVN: r131960
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