3 Commits

Author	SHA1	Message	Date
Dan Gohman	b8cab9227a	Fix command-line option printing to print two spaces where needed, ... instead of requiring all "short description" strings to begin with two spaces. This makes these strings less mysterious, and it fixes some cases where short description strings mistakenly did not begin with two spaces. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57521 91177308-0d34-0410-b5e6-96231b3b80d8	2008-10-14 20:25:08 +00:00
Dan Gohman	086ec9976f	Replace the LiveRegs SmallSet with a simple counter that keeps ... track of the number of live registers, which is all the set was being used for. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56498 91177308-0d34-0410-b5e6-96231b3b80d8	2008-09-23 18:50:48 +00:00
Dan Gohman	ee2e403545	Add a new "fast" scheduler. This is currently basically just a ... copy of the BURRList scheduler, but with several parts ripped out, such as backtracking, online topological sort maintenance (needed by backtracking), the priority queue, and Sethi-Ullman number computation and maintenance (needed by the priority queue). As a result of all this, it generates somewhat lower quality code, but that's its tradeoff for running about 30% faster than list-burr in -fast mode in many cases. This is somewhat experimental. Moving forward, major pieces of this can be refactored with pieces in common with ScheduleDAGRRList.cpp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56307 91177308-0d34-0410-b5e6-96231b3b80d8	2008-09-18 16:26:26 +00:00