https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110804
Bug ID: 110804
Summary: [13 regression] eliminate_stmt ICE on aarch64
Product: gcc
Version: 13.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: alice at ayaya dot dev
Target Milestone: ---
Created attachment 55629
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55629&action=edit
minimised repro, crashes with -O2
using the latest of the gcc13 snapshots (presently 13-20230722, but this is
present since 13 i think), i noticed that the swizzle_test.cc of the google
highway library fails to compile on version 1.0.5.
for reference, the test file is
https://github.com/google/highway/blob/1.0.5/hwy/tests/swizzle_test.cc
the compiler failure looks like
[127/130] Linking CXX executable tests/arithmetic_test
ninja: job failed: /usr/lib/ccache/bin/g++ -DGTEST_LINKED_AS_SHARED_LIBRARY=1
-DHWY_SHARED_DEFINE -DTOOLCHAIN_MISS_ASM_HWCAP_H
-I/home/demon/src/aports/community/highway/src/highway-1.0.5 -Os
-fstack-clash-protection -Wformat -Werror=format-security
-D_GLIBCXX_ASSERTIONS=1 -flto=auto -O2 -DNDEBUG -fPIE -fvisibility=hidden
-fvisibility-inlines-hidden -Wno-builtin-macro-redefined
-D__DATE__=\"redacted\" -D__TIMESTAMP__=\"redacted\" -D__TIME__=\"redacted\"
-fmerge-all-constants -Wall -Wextra -Wconversion -Wsign-conversion -Wvla
-Wnon-virtual-dtor -fmath-errno -fno-exceptions -DHWY_IS_TEST=1 -MD -MT
CMakeFiles/swizzle_test.dir/hwy/tests/swizzle_test.cc.o -MF
CMakeFiles/swizzle_test.dir/hwy/tests/swizzle_test.cc.o.d -o
CMakeFiles/swizzle_test.dir/hwy/tests/swizzle_test.cc.o -c
/home/demon/src/aports/community/highway/src/highway-1.0.5/hwy/tests/swizzle_test.cc
during GIMPLE pass: fre
/home/demon/src/aports/community/highway/src/highway-1.0.5/hwy/tests/swizzle_test.cc:
In function
'hwy::N_SVE::TestPer4LaneBlockShuffle::TestTblLookupPer4LaneBlkShuf<hwy::N_SVE::Simd<long,
32ul, 0> >(hwy::N_SVE::Simd<long, 32ul, 0>, unsigned long,
hwy::N_SVE::Simd<long, 32ul, 0>::T const*, hwy::N_SVE::Simd<long, 32ul,
0>::T*)void':
/home/demon/src/aports/community/highway/src/highway-1.0.5/hwy/tests/swizzle_test.cc:393:1:
internal compiler error: in const_unop, at fold-const.cc:1884
393 | } // namespace hwy
| ^
then i went to minimise it using cvise. i forgot to correctly check that i got
the same ICE error, so i ended up with one in eliminate_stmt. minimised repro
attached. it only crashes with -O2 (not with -O1).
i'm not sure if this is the same crash as the original const_unop, it might be
a separate case.
