[LLVMbugs] [Bug 1835] Register pressure reduction list schedulers are extremely slow on very long basic blocks

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Oct 15 11:16:12 PDT 2008


Dan Gohman <gohman at apple.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #7 from Dan Gohman <gohman at apple.com>  2008-10-15 13:16:12 ---
IsReachable was rewritten a while ago to be non-recursive, to
use a topological ordering to eliminate many unreachable cases
quickly, and to not use a SmallPtrSet. Compile time on the given
testcase is reasonable, with scheduling taking a reasonable
portion of the overall time.

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