[Bug target/105649] New: Wrong .localentry address on powerpc64le with -fpatchable-function-entry=1

[giuliano.belinassi at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105649

            Bug ID: 105649
           Summary: Wrong .localentry address on powerpc64le with
                    -fpatchable-function-entry=1
           Product: gcc
           Version: 11.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: giuliano.belinassi at gmail dot com
  Target Milestone: ---

(this bug triggered PR105647)

With the following input file:
```
struct WinsockInterfaceClass
{
    WinsockInterfaceClass(void);


    virtual int Get_Protocol(void)
    {
        return 0;
    };
};

WinsockInterfaceClass::WinsockInterfaceClass(void)
{
}
```
Saved as test.C, compiling with

> powerpc64le-suse-linux-gcc-11 -c -fpatchable-function-entry=1 test.C

Results in the following error:
```
/tmp/cczW6LfZ.s: Assembler messages:
/tmp/cczW6LfZ.s:56: Error: .localentry expression for
`_ZN21WinsockInterfaceClassC2Ev' is not a valid power of 2
```

The reason for that maybe is because the addition of nops cause the address of
.localentry to be shifted according to how many nops inserted.

OTOH

> powerpc64le-suse-linux-gcc-11 -c -fpatchable-function-entry=2 test.C

works.