ab156144da
PR rtl-opt/24160
PR target/24621
* reload1.c (reg_equiv_invariant): New.
(reload): Allocate, initialize, and free it.
(calculate_needs_all_insns): Check it when skipping equivalence
setting insns.
(alter_reg): Likewise.
(eliminate_regs_1): Rename from eliminate_regs. Add new
may_use_invariant argument; only use reg_equiv_invariant when true.
(eliminate_regs): New.
(eliminate_regs_in_insn): Use eliminate_regs_1; track when we're in
a context for which may_use_invariant may be true.
Co-Authored-By: J"orn Rennecke <joern.rennecke@st.com>
Co-Authored-By: Ulrich Weigand <uweigand@de.ibm.com>
From-SVN: r107093
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