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path: root/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
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2008-01-07rename TargetInstrDescriptor -> TargetInstrDesc.Chris Lattner
Make MachineInstr::getDesc return a reference instead of a pointer, since it can never be null. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45695 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07simplify some code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45693 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07Rename all the M_* flags to be namespace qualified enums, and switch Chris Lattner
all clients over to using predicates instead of these flags directly. These are now private values which are only to be used to statically initialize the tables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45692 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07Move a bunch more accessors from TargetInstrInfo to TargetInstrDescriptorChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45680 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07Update CodeGen for MRegisterInfo --> TargetInstrInfo changes.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45673 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-31Rename SSARegMap -> MachineRegisterInfo in keeping with the idea Chris Lattner
that "machine" classes are used to represent the current state of the code being compiled. Given this expanded name, we can start moving other stuff into it. For now, move the UsedPhysRegs and LiveIn/LoveOuts vectors from MachineFunction into it. Update all the clients to match. This also reduces some needless #includes, such as MachineModuleInfo from MachineFunction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45467 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29Remove attribution from file headers, per discussion on llvmdev.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-20More accurate checks for two-address constraints.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45259 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-20Bring back a burr scheduling heuristic that's still needed.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45252 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-18FIX for PR1799: When a load is unfolded from an instruction, check if it is ↵Evan Cheng
a new node. If not, do not create a new SUnit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45157 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-09Bug fix. Passive nodes are not in SUnitMap.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43922 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-06Add pseudo dependency to force two-address instruction to be scheduled afterEvan Cheng
other uses. There was a overly restricted check that prevented some obvious cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43762 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-15One mundane change: Change ReplaceAllUsesOfValueWith to *optionally* Chris Lattner
take a deleted nodes vector, instead of requiring it. One more significant change: Implement the start of a legalizer that just works on types. This legalizer is designed to run before the operation legalizer and ensure just that the input dag is transformed into an output dag whose operand and result types are all legal, even if the operations on those types are not. This design/impl has the following advantages: 1. When finished, this will *significantly* reduce the amount of code in LegalizeDAG.cpp. It will remove all the code related to promotion and expansion as well as splitting and scalarizing vectors. 2. The new code is very simple, idiomatic, and modular: unlike LegalizeDAG.cpp, it has no 3000 line long functions. :) 3. The implementation is completely iterative instead of recursive, good for hacking on large dags without blowing out your stack. 4. The implementation updates nodes in place when possible instead of deallocating and reallocating the entire graph that points to some mutated node. 5. The code nicely separates out handling of operations with invalid results from operations with invalid operands, making some cases simpler and easier to understand. 6. The new -debug-only=legalize-types option is very very handy :), allowing you to easily understand what legalize types is doing. This is not yet done. Until the ifdef added to SelectionDAGISel.cpp is enabled, this does nothing. However, this code is sufficient to legalize all of the code in 186.crafty, olden and freebench on an x86 machine. The biggest issues are: 1. Vectors aren't implemented at all yet 2. SoftFP is a mess, I need to talk to Evan about it. 3. No lowering to libcalls is implemented yet. 4. Various operations are missing etc. 5. There are FIXME's for stuff I hax0r'd out, like softfp. Hey, at least it is a step in the right direction :). If you'd like to help, just enable the #ifdef in SelectionDAGISel.cpp and compile code with it. If this explodes it will tell you what needs to be implemented. Help is certainly appreciated. Once this goes in, we can do three things: 1. Add a new pass of dag combine between the "type legalizer" and "operation legalizer" passes. This will let us catch some long-standing isel issues that we miss because operation legalization often obfuscates the dag with target-specific nodes. 2. We can rip out all of the type legalization code from LegalizeDAG.cpp, making it much smaller and simpler. When that happens we can then reimplement the core functionality left in it in a much more efficient and non-recursive way. 3. Once the whole legalizer is non-recursive, we can implement whole-function selectiondags maybe... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42981 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-12EXTRACT_SUBREG coalescing support. The coalescer now treats EXTRACT_SUBREG likeEvan Cheng
(almost) a register copy. However, it always coalesced to the register of the RHS (the super-register). All uses of the result of a EXTRACT_SUBREG are sub- register uses which adds subtle complications to load folding, spiller rewrite, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42899 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-05Fix a typo in a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42635 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-05Chain producing nodes cannot be moved, not chain reading nodes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42627 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-05Oops. Didn't mean to leave this in.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42626 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-05If a node that defines a physical register that is expensive to copy. TheEvan Cheng
scheduler will try a number of tricks in order to avoid generating the copies. This may not be possible in case the node produces a chain value that prevent movement. Try unfolding the load from the node before to allow it to be moved / cloned. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42625 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-28If two instructions are both two-address code, favors (schedule closer toEvan Cheng
terminator) the one that has a CopyToReg use. This fixes 2006-05-11-InstrSched.ll with -new-cc-modeling-scheme. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42453 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-28Remove a poor scheduling heuristic.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42443 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-28Trim some unneeded fields.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42442 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-27Avoid inserting a live register more than once.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42410 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-27Boogs.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42388 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-27Be smarter about which node to force schedule. Reduce # of duplications + ↵Evan Cheng
copies; Added statistics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42387 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-27Backtracking only when it won't create a cycle.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42384 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-26- Move getPhysicalRegisterRegClass() from ScheduleDAG to MRegisterInfo.Evan Cheng
- Added ability to emit cross class register copies to the BBRU scheduler. - More aggressive backtracking. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42375 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-25Added major new capabilities to scheduler (only BURR for now) to support ↵Evan Cheng
physical register dependency. The BURR scheduler can now backtrace and duplicate instructions in order to avoid "expensive / impossible to copy" values (e.g. status flag EFLAGS for x86) from being clobbered. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42284 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-19Use struct SDep instead of std::pair for SUnit pred and succ lists. First stepEvan Cheng
in tracking physical register output dependencies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42125 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13Bug fixes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41900 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-20Minor cleanups to reduce some spurious differences between differentDan Gohman
scheduler implementations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41191 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-13Skeleton of post-RA scheduler; doesn't do anything yet.Dale Johannesen
Change name of -sched option and DEBUG_TYPE to pre-RA-sched; adjust testcases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39816 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-29Remove unused variables.David Greene
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37816 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-29Remove unnecessary attributions in comments.David Greene
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37799 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-29Remove the "special tie breaker" because it resulted in inconsistentDavid Greene
ordering and thus violated the strict weak ordering requirement of priority_queue. Uncovered by _GLIBCXX_DEBUG. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37794 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-22std::set is really really terrible. Switch to SmallPtrSet to reduce compile ↵Evan Cheng
time. For Duraid's example. The overall isel time is reduced from 0.6255 sec to 0.1876 sec. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37701 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-26Fix a typo in a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36485 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-14Estimate a cost using the possible number of scratch registers required and useEvan Cheng
it as a late BURR scheduling tie-breaker. Intuitively, it's good to push down instructions whose results are liveout so their long live ranges won't conflict with other values which are needed inside the BB. Further prioritize liveout instructions by the number of operands which are calculated within the BB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35109 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-13Try schedule def + use closer whne Sethi-Ullman numbers are the same.Evan Cheng
e.g. t1 = op t2, c1 t3 = op t4, c2 and the following instructions are both ready. t2 = op c3 t4 = op c4 Then schedule t2 = op first. i.e. t4 = op c4 t2 = op c3 t1 = op t2, c1 t3 = op t4, c2 This creates more short live intervals which work better with the register allocator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35089 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-03switch the sched unit map over to use a DenseMap instead of std::map. ThisChris Lattner
speeds up isel as a whole time by 2.6%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33810 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01Fit in 80 columnsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33745 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-08Naming consistency.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33026 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-08Fix for PR1075: bottom-up register-reduction scheduling actually increases ↵Evan Cheng
register pressure. - Fixed bugs in sethi-ullman number computation and priority queue comparison functions. - Separate code that handles priority computation special cases from SU number computation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33025 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-07Removing even more <iostream> includes.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32320 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-01Match TargetInstrInfo changes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32098 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-06Remove dead code; added a missing null ptr check.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31478 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-04Changes to use operand constraints to process two-address instructions.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31453 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-03silence warningChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31397 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-02For PR786:Reid Spencer
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting fall out by removing unused variables. Remaining warnings have to do with unused functions (I didn't want to delete code without review) and unused variables in generated code. Maintainers should clean up the remaining issues when they see them. All changes pass DejaGnu tests and Olden. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-01Clean up.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31359 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-01CopyFromReg starts a live range so its use should not be considered a floater.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31356 91177308-0d34-0410-b5e6-96231b3b80d8
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