Gcc 3.3.6 introduced an interesting regression for sparc.

Havard Eidnes reported that sparc's bootxx became too big to fit when
compiled with the new gcc.  Compared to the pre-3.3.6 import bootxx
contained __muldi3 and .umul (pulled in by the former) which was weird
as __muldi3 is never actually called.

I tracked this bug down to the following minimal testcase:

  static inline int test(int a) { return a * 1000000000; }
  int main() { return 0; }

When compiled with gcc 3.3.6 the .S file contains orphan
".global .umul" both with default -O2 and -O0.  With -O3 the refernce
goes away.

bootxx reference to __muldi3 is triggered by a similar static inline
bintime2timespec() in <sys.time.h>

as(1) produces an undefined symbol references for such orphan .global,
and so linker pulls in the symbol if the program is linked statically.

In-tree gcc4 (4.1.1+) doesn't have this bug.

The bug seems to be sparc specific.  At least this test case compiles
ok with arm, sh3 and i386 cross-compilers I have handy.

SY, Uwe
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