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2010-08-10Turn optimize compares back on with fix. We needed to test that a machine op wasBill Wendling
a register before checking if it was defined. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110733 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Give up on register class recalculation when the register is used with subregJakob Stoklund Olesen
operands. We don't currently have a hook to provide "the largest super class of A where all registers' getSubReg(subidx) is valid and in B". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110730 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Revert r110718; it broke clang-i386-darwin9.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110726 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Avoid editing the current live interval during remat.Jakob Stoklund Olesen
The live interval may be used for a spill slot as well, and that spill slot could be shared by split registers. We cannot shrink it, even if we know the current register won't need the spill slot in that range. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110721 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10More debug spewJakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110720 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Turn optimize cmps on by default so that we can get some testing by the nightlyBill Wendling
ARM testers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110718 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Do not forget debug info for enums. Use named mdnode to keep track of these ↵Devang Patel
types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110712 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Implement register class inflation.Jakob Stoklund Olesen
When splitting a live range, the new registers have fewer uses and the permissible register class may be less constrained. Recompute the register class constraint from the uses of new registers created for a split. This may let them be allocated from a larger set, possibly avoiding a spill. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110703 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Recalculate the spill weight and allocation hint for virtual registers createdJakob Stoklund Olesen
during live range splitting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110686 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Handle TAG_constant for integers.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110656 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Update CMake...sorry for the breakage.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110654 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Simplify.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110653 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Drop "const". It does not add value here.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110652 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Add missing null check reported by Amaury Pouly.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110649 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Do not include file static variable in pubnames list.Devang Patel
Refactor and simplify code to avoid redundant checks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110642 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Transpose the calculation of spill weights such that we are calculating oneJakob Stoklund Olesen
register at a time. This turns out to be slightly faster than iterating over instructions, but more importantly, it allows us to compute spill weights for new registers created after the spill weight pass has run. Also compute the allocation hint at the same time as the spill weight. This allows us to use the spill weight as a cost metric for copies, and choose the most profitable hint if there is more than one possibility. The new hints provide a very small (< 0.1%) but universal code size improvement. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110631 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09Merge the OptimizeExts and OptimizeCmps passes into one PeepholeOptimizerBill Wendling
pass. This pass should expand with all of the small, fine-grained optimization passes to reduce compile time and increase happiment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110627 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09Undo accidental commit.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110623 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09Simplify. Avoid redundant checks.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110621 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09Refactor.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110607 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09Refactoring. Update DbgVarible to handle queries itself.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110600 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09It is ok, and convenient, to pass descriptors by value.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110590 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09A REG_SEQUENCE instruction may use the same register twice.Jakob Stoklund Olesen
If we are emitting COPY instructions for the REG_SEQUENCE, make sure the kill flag goes on the last COPY. Otherwise we may be using a killed register. <rdar://problem/8287792> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110589 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09Rename a method.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110586 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-08Use the "isCompare" machine instruction attribute instead of calling theBill Wendling
relatively expensive comparison analyzer on each instruction. Also rename the comparison analyzer method to something more in line with what it actually does. This pass is will eventually be folded into the Machine CSE pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110539 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-07Tidy some #includes and forward-declarations, and move the C binding codeDan Gohman
out of PassManager.cpp and into Core.cpp with the rest of the C binding code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110494 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Lazily defer duplicating the live interval we are splitting until we know it isJakob Stoklund Olesen
necessary. Sometimes, live range splitting doesn't shrink the current interval, but simply changes some instructions to use a new interval. That makes the original more suitable for spilling. In this case, we don't need to duplicate the original. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110481 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Cleanup comment wordingJim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110466 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Keep the MachiuneFunctionPass pointer around. It is useful for verification.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110464 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Add LiveInterval::RenumberValues - Garbage collection for VNInfos.Jakob Stoklund Olesen
After heavy editing of a live interval, it is much easier to simply renumber the live values instead of trying to keep track of the unused ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110463 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Reapply r110396, with fixes to appease the Linux buildbot gods.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Add more verification of LiveIntervals.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110454 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Fix swapped COPY operands.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110453 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Don't try to verify LiveIntervals for physical registers.Jakob Stoklund Olesen
When a physical register is in use, some alias of that register has a live interval with a relevant live range. That is the sad state of intervals after physreg coalescing of subregs, and it is good enough for correct register allocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110452 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Update CMake build.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110429 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Add the Optimize Compares pass (disabled by default).Bill Wendling
This pass tries to remove comparison instructions when possible. For instance, if you have this code: sub r1, 1 cmp r1, 0 bz L1 and "sub" either sets the same flag as the "cmp" instruction or could be converted to set the same flag, then we can eliminate the "cmp" instruction all together. This is a important for ARM where the ALU instructions could set the CPSR flag, but need a special suffix ('s') to do so. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110423 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06While emitting DBG_VALUE for registers spilled at the end of a block do not ↵Devang Patel
use location of MBB->end(). If a block does not have terminator then incoming iterator points to end(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110411 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Revert r110396 to fix buildbots.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Be more aggressive about removing joined physreg copies.Jakob Stoklund Olesen
When a joined COPY changes subreg liveness, we keep it around as a KILL, otherwise it is safe to delete. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110403 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Don't verify LiveVariables if LiveIntervals is available.Jakob Stoklund Olesen
LiveVariables becomes horribly wrong while the coalescer is running, but the analysis is not zapped until after the coalescer pass has run. This causes tons of false reports when calling verify form the coalescer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110402 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Don't use PassInfo* as a type identifier for passes. Instead, use the ↵Owen Anderson
address of the static ID member as the sole unique type identifier. Clean up APIs related to this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Add basic verification of LiveIntervals.Jakob Stoklund Olesen
We verify that the LiveInterval is live at uses and defs, and that all instructions have a SlotIndex. Stuff we don't check yet: - Is the LiveInterval minimal? - Do all defs correspond to instructions or phis? - Do all defs dominate all their live ranges? - Are all live ranges continually reachable from their def? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110386 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Remove double-def checking from MachineVerifier, so a register does not have toJakob Stoklund Olesen
be killed before being redefined. These checks are usually disabled, and usually fail when enabled. We de facto allow live registers to be redefined without a kill, the corresponding assertions in RegScavenger were removed long ago. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110362 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Avoid using a live std::multimap iterator while editing the map. It looks likeJakob Stoklund Olesen
we sometimes compare singular iterators, reported by ENABLE_EXPENSIVE_CHECKS. This fixes PR7825. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110355 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04The lower invoke pass needs to have unreachable code elimination run after itBill Wendling
because it could create such things. This fixes a MingW buildbot test failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110279 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04Coalesce stack slot accesses that arise when spilling both sides of a COPY.Jakob Stoklund Olesen
This helps avoid silly code: %R0<def = LOAD <fi#5> STORE <fi#5>, %R0<kill> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110266 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04Checkpoint SplitKit progress.Jakob Stoklund Olesen
We are now at a point where we can split around simple single-entry, single-exit loops, although still with some bugs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110257 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04Use location entry only of the location described by DBG_VALUE is valid.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110255 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04The EH prepare passes really want to be the last passes run before code-gen.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110248 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04Fix typo in comment.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110244 91177308-0d34-0410-b5e6-96231b3b80d8
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