https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93148
Bug ID: 93148
Summary: Pointer-function-result as LVALUE variable – function
called multiple times with copy-in/out
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: tkoenig at gcc dot gnu.org
Target Milestone: ---
Created attachment 47588
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47588&action=edit
Test case – compile & run
Found when looking at PR91640, cf.
https://gcc.gnu.org/ml/gcc-patches/2020-01/threads.html#00070
If one uses:
call foo(f())
where foo takes a nonpointer dummy argument and f returns a pointer, the
pointer result is regarded as normal variable. (= gfc_is_variable == true).
Unfortunately, "f()" is called twice: once for the copy in and once for the
copy out.
Expected: It is only called once. See attached test case.
