https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69542
Bug ID: 69542
Summary: [6 Regression] -fcompare-debug failure in
simplify-rtx.c on i?86 since r232905
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
r232905 breaks bootstrap on i686-linux, with miscompare of simplify-rtx.o.
I'm still reducing testcase for this, but have bisected it to this commit
already.
Guess either the
if (regno >= FIRST_PSEUDO_REGISTER && reg->subreg_p)
680 bitmap_set_bit (&subreg_regs, regno);
or perhaps the whole set_bb_regs function should not be called for DEBUG_INSNs.
I think it shouldn't contain any type != OP_IN regs anyway, nor REG_DEAD notes.
