COMPLEX_FLOAT bugs

[Jim Wilson]

	The gcc tests:
	FAIL: gcc.c-torture/execute/complex-5.c execution,  -O0 
	...
	have consistantly failed for me under mips-sgi-irix6.3, so I thought I
	would take a look at it.

This is due to a fundmental flaw in the implementation of the __complex__
support.  It fails for foo __complex__ if foo is less than or equal to half
the word size.  Hence float __complex__ fails on all 64 bit machines, such
as Irix 6.  It is possible to write testcases using short __complex__ that
will fail on a 32 bit machine.

This has been a long standing problem.  There is no simple fix for it.
It will eventually get fixed, but meanwhile there is no need to worry about
these complex-5.c failures on 64 bit machines.

Jim