https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105012
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
erfcx_r4 = {CLOBBER};
calerf_r4 ((real(kind=4) *) x, &__result_erfcx_r4(address-taken),
&jint(address-taken));
hints at that gfortran somehow knows that it should pass the result but it
still somehow clobbers the function itself!? So maybe not wrong-code but
missed-optimization.
The operand scanner has
case FUNCTION_DECL:
case LABEL_DECL:
case CASE_LABEL_EXPR:
/* Expressions that make no memory references. */
return;
where it does not assign virtual operands to FUNCTION_DECLs. It's probably
good to make DSE more forgiving here. I'm testing such workaround.
