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SH: Fix PR 111001

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gcc/ChangeLog:

	PR target/111001
	* config/sh/sh_treg_combine.cc (sh_treg_combine::record_set_of_reg):
	Skip over nop move insns.
This commit is contained in:
Oleg Endo 2023-10-23 22:08:37 +09:00
parent 9ed6b22eb4
commit 267e369afb
1 changed files with 8 additions and 1 deletions
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9
gcc/config/sh/sh_treg_combine.cc
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@ -729,7 +729,14 @@ sh_treg_combine::record_set_of_reg (rtx reg, rtx_insn *start_insn,
}
else if (REG_P (new_entry.cstore.set_src ()))
{
// If it's a reg-reg copy follow the copied reg.
// If it's a reg-reg copy follow the copied reg, but ignore
// nop copies of the reg onto itself.
if (REGNO (new_entry.cstore.set_src ()) == REGNO (reg))
{
i = prev_nonnote_nondebug_insn_bb (i);
continue;
}
new_entry.cstore_reg_reg_copies.push_back (new_entry.cstore);
reg = new_entry.cstore.set_src ();
i = new_entry.cstore.insn;