https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98991
--- Comment #3 from zhan3299 at purdue dot edu ---
(In reply to Martin Liška from comment #1)
> Is it a valid or invalid code, please?
Hi, sorry for the confusion. I used a simple delta debugging to reduce the
test-case, and it seems very confused.
Currently, I use C-Reduce to get a simple test-case:
--- poc.cc starts ---
void a() {
float b;
asm("" : "=rmf"(b) : "0"(0));
&b;
}
--- poc.cc ends ---
run 'gcc poc.cc -fpermissive' and we can get the same ICE.
--- error trace starts ---
during RTL pass: reload
poc.cc: In function 'void a()':
poc.cc:5:1: internal compiler error: maximum number of generated reload insns
per insn achieved (90)
5 | }
| ^
0x20cb324 lra_constraints(bool)
../../gcc/gcc/lra-constraints.c:4951
0x20ab2c8 lra(_IO_FILE*)
../../gcc/gcc/lra.c:2440
0x1ff80de do_reload()
../../gcc/gcc/ira.c:5523
0x1ff80de (anonymous namespace)::pass_reload::execute(function*)
../../gcc/gcc/ira.c:5709
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.
--- error trace ends ---
I test it with gcc 10.2.0, but it seems my native 7.5.0 also failed.
