https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117095
--- Comment #3 from Stefan Schulze Frielinghaus <stefansf at gcc dot gnu.org>
---
Calling cse_insn() for
(insn 99 98 100 12 (set (reg:SI 138)
(const_int 1 [0x1])) "t.c":9:31 1507 {*movsi_zarch}
(nil))
results in a call to insert_regs() where we have
(gdb) call debug_rtx(x)
(reg:SI 138)
(gdb) call dump_class(classp)
Equivalence chain for (const_int 1 [0x1]):
(const_int 1 [0x1])
(reg:SI 165)
So indeed cse2 decided that pseudo 165 holds constant 1. I didn't spot the
point where cse2 decides this. Any idea where to start?
