https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111877
Bug ID: 111877
Summary: [14 Regression] ICE: verify_ssa failed: PHI node with
wrong VUSE on edge from BB 25 with -O -fno-tree-sink
-ftree-vectorize
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-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 56150
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56150&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -fno-tree-sink -ftree-vectorize testcase.c
testcase.c: In function 'buffer_ctrl':
testcase.c:4:1: error: PHI node with wrong VUSE on edge from BB 25
4 | buffer_ctrl (long ret, int i)
| ^~~~~~~~~~~
.MEM_51 = PHI <.MEM_10(25), .MEM_10(22)>
expected .MEM_39
testcase.c:4:1: error: PHI node with wrong VUSE on edge from BB 22
.MEM_51 = PHI <.MEM_10(25), .MEM_10(22)>
expected .MEM_39
during GIMPLE pass: vect
testcase.c:4:1: internal compiler error: verify_ssa failed
0x172fccf verify_ssa(bool, bool)
/repo/gcc-trunk/gcc/tree-ssa.cc:1203
0x1386415 execute_function_todo
/repo/gcc-trunk/gcc/passes.cc:2095
0x138687e 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/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-4710-20231018090306-g60c231cb658-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-r14-4710-20231018090306-g60c231cb658-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231018 (experimental) (GCC)
