https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103064
Bug ID: 103064
Summary: ICE: verify_ssa failed: RESULT_DECL should be read
only when DECL_BY_REFERENCE is set with
-fharden-conditional-branches
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Created attachment 51730
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51730&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -fharden-conditional-branches -fno-tree-pta
testcase.C
testcase.C: In function 'S f()':
testcase.C:14:3: error: RESULT_DECL should be read only when DECL_BY_REFERENCE
is set
14 | S f() {
| ^
while verifying SSA_NAME s_7 in statement
__asm__("" : "=g" s_7 : "0" s_2(D));
during GIMPLE pass: hardcbr
testcase.C:14:3: internal compiler error: verify_ssa failed
0x184ac8f verify_ssa(bool, bool)
/repo/gcc-trunk/gcc/tree-ssa.c:1212
0x1517c3d execute_function_todo
/repo/gcc-trunk/gcc/passes.c:2049
0x151857b execute_todo
/repo/gcc-trunk/gcc/passes.c:2096
Please submit a full bug report,
with preprocessed source if appropriate.
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-r12-4872-20211103145922-g600dcd74b8e-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/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-r12-4872-20211103145922-g600dcd74b8e-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.0 20211103 (experimental) (GCC)
