https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112106
Bug ID: 112106
Summary: ICE: verify_flow_info failed: verify_flow_info:
REG_BR_PROB does not match cfg 268435462 268435460
with custom flags
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 56318
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56318&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O3 -fno-ivopts -mno-unroll-only-small-loops
--param=max-jump-thread-duplication-stmts=50 -fno-tree-ch
-fharden-control-flow-redundancy -fno-tree-vrp testcase.C
testcase.C: In function 'void DrawSprite(int)':
testcase.C:39:1: error: verify_flow_info: REG_BR_PROB does not match cfg
268435462 268435460
39 | }
| ^
during RTL pass: loop2_unroll
testcase.C:39:1: internal compiler error: verify_flow_info failed
0x125a54e verify_flow_info()
/repo/gcc-trunk/gcc/cfghooks.cc:287
0x16835f7 execute_function_todo
/repo/gcc-trunk/gcc/passes.cc:2100
0x1683b2e execute_todo
/repo/gcc-trunk/gcc/passes.cc:2142
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-4964-20231027105550-g7eed861e8ca-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-4964-20231027105550-g7eed861e8ca-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231027 (experimental) (GCC)
