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From: "triffid.hunter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/105753] [avr] ICE: in add_clobbers, at
 config/avr/avr-dimode.md:2705
Date: Sun, 11 Sep 2022 10:19:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105753

Triffid Hunter <triffid.hunter at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |triffid.hunter at gmail do=
t com

--- Comment #5 from Triffid Hunter <triffid.hunter at gmail dot com> ---
Created attachment 53561
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53561&action=3Dedit
patch based on comment 1

I ran into this issue yesterday (with gcc-13.0.0-20220904).

I made the attached patch based on Comment 1, and it does seem to solve the
issue.

I had some odd lto-related crashes afterwards, but wasn't able to reproduce
them after a clean rebuild of my project - so I suspect there was some odd
interaction with stale/cached object files.

lto crash backtrace in case it's relevant:

avr-gcc -Wall -Wextra -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections
-mmcu=3Datmega2560 -fno-stack-protector -o
/tmp/arduino_build_820599/sketch_sep10a.ino.elf
/tmp/arduino_build_820599/sketch/sketch_sep10a.ino.cpp.o
/tmp/arduino_build_820599/libraries/SD/File.cpp.o
/tmp/arduino_build_820599/libraries/SD/SD.cpp.o
/tmp/arduino_build_820599/libraries/SD/utility/Sd2Card.cpp.o
/tmp/arduino_build_820599/libraries/SD/utility/SdFile.cpp.o
/tmp/arduino_build_820599/libraries/SD/utility/SdVolume.cpp.o
/tmp/arduino_build_820599/libraries/SPI/SPI.cpp.o
/tmp/arduino_build_820599/../arduino_cache_495395/core/core_arduino_avr_meg=
a_cpu_atmega2560_0535ac2d4e0500949a67f524c7f20d71.a
-L/tmp/arduino_build_820599 -lm
lto1: internal compiler error: Segmentation fault
0x135b2a8 internal_error(char const*, ...)
???:0
0x675125 bp_unpack_string(data_in*, bitpack_d*)
???:0
0x986c9e cl_optimization_stream_in(data_in*, bitpack_d*, cl_optimization*)
???:0
0xc3bf60 streamer_read_tree_bitfields(lto_input_block*, data_in*, tree_node=
*)
???:0
0x904fad lto_input_tree_1(lto_input_block*, data_in*, LTO_tags, unsigned in=
t)
???:0
0x9053d7 lto_input_scc(lto_input_block*, data_in*, unsigned int*, unsigned
int*, bool)
???:0
0x5e9fc8 read_cgraph_and_symbols(unsigned int, char const**)
???:0
0x5d7222 lto_main()
???:0

Note: stopped happening after clean project rebuild, but ideally it should
throw a proper error rather than a segfault?=