[Bug rtl-optimization/44281] [4.3/4.4/4.5/4.6 Regression] Global Register variable pessimisation

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44281

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-04 07:46:11 UTC ---
Using 6 global register variables is clearly self-inflicted pain, even on
x86_64, because if you take 6 registers away and another 6 registers are used
for parameter passing, you make the target very limited on number of registers
and the compiler has much more limited choices in generating close to optimal
code.
Just don't do this.