[Bug target/26674] missed optimization / 128-bit arithmetic.

[pluto at agmk dot net]

------- Comment #3 from pluto at agmk dot net  2006-10-22 17:44 -------
recent 4.2 produces worse %rcx setup code.

previously:

xorl    %edx, %edx
movq    %rdx, %rcx

now:

movq    %rdi, %rax
sarq    $63, %rax
movq    %rax, %rcx


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26674