https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93663
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Target| |i386-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-02-10
CC| |msebor at gcc dot gnu.org
Component|c |target
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Bisection points to r274927. Based on the change below I assume
it's a target-specific issue.
2019-08-26 Richard Biener <rguent...@suse.de>
PR target/91522
PR target/91527
* config/i386/i386-features.h (general_scalar_chain::defs_map):
New member.
(general_scalar_chain::replace_with_subreg): Remove.
(general_scalar_chain::replace_with_subreg_in_insn): Likewise.
(general_scalar_chain::convert_reg): Adjust signature.
* config/i386/i386-features.c (scalar_chain::add_insn): Do not
iterate over all defs of a reg.
(general_scalar_chain::replace_with_subreg): Remove.
(general_scalar_chain::replace_with_subreg_in_insn): Likewise.
(general_scalar_chain::make_vector_copies): Populate defs_map,
place copy only after defs that are used as vectors in the chain.
(general_scalar_chain::convert_reg): Emit a copy for a specific
def in a specific instruction.
(general_scalar_chain::convert_op): All reg uses are converted here.
(general_scalar_chain::convert_insn): Emit copies for scalar
uses of defs here. Replace uses with the copies we created.
Replace and convert the def. Adjust REG_DEAD notes, remove
REG_EQUIV/EQUAL notes.
(general_scalar_chain::convert_registers): Only handle copies
into the chain here.
