[Bug rtl-optimization/17236] inefficient code for long long multiply on x86

[bonzini at gnu dot org]

------- Comment #20 from bonzini at gnu dot org  2007-12-19 12:32 -------
There is a big catch-22.  When GCC ties one of regs 64/66 with reg 61, it
enlarges reg 61's live range to cover the live range of the tied range.  When
it does this, it basically locks up %edx for the whole live range of reg 61. 
:-(


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17236