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2004-01-31Revert last night's changes as they broke some tests. Will remerge parts of ↵Alkis Evlogimenos
the patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11029 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31Several performance enhancements and cleanups from Chris.Alkis Evlogimenos
Simplification of LiveIntervals::Interval::overlaps() and addition of examples to overlaps() and liveAt() to make them clearer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11028 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-30Finegrainify namespacificationChris Lattner
Implement LiveVariables::getIndexMachineBasicBlock git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11018 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-30Give clients of MachineFunctionPrinter the ability to specify a banner andBrian Gaeke
choose an ostream. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11016 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-23Fix failing test cases with joined live intervals. It turns out thatAlkis Evlogimenos
when joining we need to check if we overlap with the second interval or any of its aliases. Also make joining intervals the default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10973 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22Add option to join live intervals. Two intervals are joined if thereAlkis Evlogimenos
is a move between two registers, at least one of the registers is virtual and the two live intervals do not overlap. This results in about 40% reduction in intervals, 30% decrease in the register allocators running time and a 20% increase in peephole optimizations (mainly move eliminations). The option can be enabled by passing -join-liveintervals where appropriate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10965 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22Remove unneeded check. An interval in active, by definition overlapsAlkis Evlogimenos
with the current one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10959 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22Improve debugging output. Remove unneeded virtReg->0 mapping whenAlkis Evlogimenos
virtReg lives on the stack. Now a virtual register has an entry in the virtual->physical map or the virtual->stack slot map but never in both. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10958 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22Revert previous change. The code was correct...Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10957 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22Fix incorrect negatives in LiveIntervals::Interval::liveAt().Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10956 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-20Moved iterators around.Tanya Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10926 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-20Moved iterators to common file.Tanya Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10925 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16Handle printing of intervals that are not assign to any physicalAlkis Evlogimenos
register yet (2nd try). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10896 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16Handle printing of intervals that are not assign to any physicalAlkis Evlogimenos
register yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10895 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16Fold open interval ends handling intoAlkis Evlogimenos
LiveIntervals::Interval::expiredAt() and simplify regalloc code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10894 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16Add asserts to previous change.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10893 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16Use a list instead of a vector to store intervals. This will be neededAlkis Evlogimenos
when we join intervals and one of the two will need to be removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10892 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14Hrm, apparently I missed lowering this intrinsic. :(Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10858 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14Properly update #intervals statistic.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10847 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14Fix bug in LiveIntervals::Interval::overlaps andAlkis Evlogimenos
LiveIntervals::Interval::liveAt. Both were considering the live ranges closed in the end, when they are actually open. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10835 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14Improve debugging output.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10834 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Fix miscomputation of live intervals. The catch is that registers canAlkis Evlogimenos
be dead at the defining instruction but can only be killed in subsequent ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10833 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Remove allocatable registers vector. It is already provided byAlkis Evlogimenos
LiveVariables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10830 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Cleanup debugging output.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10824 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Fix output of live intervals to show correctly its closed, openAlkis Evlogimenos
ranges, i.e. [a,b) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10822 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Remove unneeded check (with the recent change in live variables a useAlkis Evlogimenos
of a physical register is always dominated by a def). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10821 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Indentation and whitespace cleanups.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10820 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Fix bug introduced by previous commit: check if fixed intervalsAlkis Evlogimenos
overlap before adding their spill weight. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10819 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13Correctly compute live variable information for physical registersAlkis Evlogimenos
when an implicitely defined register is later used by an alias. For example: call foo %reg1024 = mov %AL The call implicitely defines EAX but only AL is used. Before this fix no information was available on AL. Now EAX and all its aliases except AL get defined and die at the call instruction whereas AL lives to be killed by the assignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10813 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-11Make LiveVariables::HandlePhysRegUse andAlkis Evlogimenos
LiveVariables::HandlePhysRegDef private they use information that is not in memory when LiveVariables finishes the analysis. Also update the TwoAddressInstructionPass to not use this interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10755 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-10Remove use of llvm/CodeGen/InstrSelection.hChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10749 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09Finegrainify namespacification.Chris Lattner
This should get hunked over to the Sparc backend, along with MachineCodeForInstruction and a bunch of files in include/llvm/Codegen, but those battles will have to wait for a later time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10731 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09Move InstrSelection into lib/Target/Sparc, as it's sparc specificChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10730 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09Move lib/Codegen/RegAlloc into lib/Target/Sparc, as it is sparc specificChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10728 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07Add a separate list of fixed intervals. This improves the running timeAlkis Evlogimenos
of the register allocator as follows: before after mesa 2.3790 1.5994 vpr 2.6008 1.2078 gcc 1.9840 0.5273 mcf 0.2569 0.0470 eon 1.8468 1.4359 twolf 0.9475 0.2004 burg 1.6807 1.3300 lambda 1.2191 0.3764 Speedups range anyware from 30% to over 400% :-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10712 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07Minor cleanups.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10711 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07Remove declared but undefined method.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10710 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07Change implementation of LiveIntervals::overlap(). This results in aAlkis Evlogimenos
30-50% decrease in running time of the linear scan register allocator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10707 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05Remove simple coalescing.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10695 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05fix warningChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10692 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05Add VMCore and code generator support for debugging intrinsics. By defaultChris Lattner
code generators completely ignore them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10691 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05Currently we cannot handle two-address instructions of the form:Alkis Evlogimenos
A = B op C where A == C, but this cannot really occur in practice because of SSA form. Add an assert to check that just to be safe. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10682 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-04Update description.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10681 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Clean up a lot of the code I added yesterday by exposing the IntrinsicLoweringChris Lattner
implementation from the TargetMachine directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10636 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Reserve ECX and EDI instead of EBX and EDI. Since EBX is a calleeAlkis Evlogimenos
saved register it has a longer free range than ECX (which is defined every time there is a fnuction call) which makes ECX a better register to reserve. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10635 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Add coalescing to register allocator. A hint is added to each intervalAlkis Evlogimenos
which denotes the register we would like to be assigned to (virtual or physical). In register allocation, if this hint exists and we can map it to a physical register (it is either a physical register or it is a virtual register that already got assigned to a physical one) we use that register if it is available instead of a random one in the free pool. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10634 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Whoops, don't try to lower non intrinsic callsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10632 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Use the intrinsic lowering functionalityChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10626 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Move into the VMCore libraryChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10623 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28Implement the default implementation of the intrinsic lowering classChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10621 91177308-0d34-0410-b5e6-96231b3b80d8
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