GCC bug on PowerPC with gcc 2.95.2?

[Cort Dougan]

gcc version 2.95.2 19991024 (release)

I've tried this hosted on a Linux/x86 system targeting a Linux/PPC system
and I've done a native build on a Linux/PPC host.

I've attached the program that demonstrates the problem.  The command line
was:

ppc-linux-gcc --save-temps gccbug.c

In the inline asm I change r1 but I tell gcc in the 'modifies' constraint
that I've changed it.  The output asm shows that it doesn't save/restore r1
during that code, though.

This seems like a bug but may be an undocumented feature of gcc.  It shows
this behavior with 2.95.2 (19991024) but I haven't tried others.

I'm including the .c, .s and .i.
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