[llvm-dev] variadic functions on X86_64 should (conditionally) save XMM regs even if -no-implicit-float

[Anton Korobeynikov via llvm-dev]

> The problem is that now, when optimization is disabled, the compiler will *unconditionally* access XMM registers in the prolog of varargs functions. This is *not* the usual code to spill floating point varargs arguments (which is correctly guarded by testing %al). Instead the compiler:
I believe this is a bug that needs to be handled separately..

-- 
With best regards, Anton Korobeynikov
Department of Statistical Modelling, Saint Petersburg State University