[Issue 20441] Wrong code with -O -fPIC and string literal.ptr

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20441

--- Comment #2 from Don <clugdbug at yahoo.com.au> ---
On any non-ancient DMD version, -fPIC is enabled by default in the dmd.conf
file.

I have run the testcase on 2.078 with -fPIC removed from the dmd.conf file. It
requires both -fPIC and -O to trigger the bug.

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