[Bug c/63393] New: -ffreestanding not work: memset call cause valgrind crash

[dushistov at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63393

            Bug ID: 63393
           Summary: -ffreestanding not work: memset call cause valgrind
                    crash
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dushistov at mail dot ru

Created attachment 33588
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33588&action=edit
problem code

On my system linux/x86_64 compilation of valgrind with -O3 -march=native cause
crash of valgrind with any executable file.

The problem is similar to http://llvm.org/bugs/show_bug.cgi?id=9795,

vgPlain_memset call memset, memset call vgPlain_memset and so on.

To simplify bug hunting I extract code to separate file,
if compile it with:

>gcc -O3 -march=native -ffreestanding  -static -nodefaultlibs -nostartfiles  -ggdb test_memset.c

gcc give error: undefined reference to `memset', but with "-O2"

>>gcc -O2 -march=native -ffreestanding  -static -nodefaultlibs -nostartfiles  -ggdb test_memset.c

all works fine.

gcc 4.8.1