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path: root/lib/CodeGen/PHIElimination.cpp
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2006-06-28Use hidden visibility to make symbols in an anonymous namespace getChris Lattner
dropped. This shrinks libllvmgcc.dylib another 67K git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28975 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-04Add support for targets (like Alpha) that have terminator instructions whichChris Lattner
use virtual registers. We now allow the first instruction in a block of terminators to use virtual registers, and update phi elimination to correctly update livevar when eliminating phi's. This fixes a problem on a testcase Andrew sent me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25083 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-04Add an assertion, update DefInst even though no one uses it (dangling pointersChris Lattner
don't help anyone) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25081 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-03clean up this code a bit, no functionality changeChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23609 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-03Break the body of the loop out into a new methodChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23606 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23adjust to new live variables interfaceChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22992 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-05* Order #includes alphabeticallyMisha Brukman
* Remove commented-out debug printouts git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21707 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-22Convert tabs to spacesMisha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21439 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-21Remove trailing whitespaceMisha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-01Changes For Bug 352Reid Spencer
Move include/Config and include/Support into include/llvm/Config, include/llvm/ADT and include/llvm/Support. From here on out, all LLVM public header files must be under include/llvm/. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-23Update live intervals more accurately for PHI elim. This slightly reducesChris Lattner
the live intervals for some registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15125 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-22costmetic changesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15118 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-19There is no need to store the MBB along with the MI any more, we can nowChris Lattner
ask instructions for their parent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14998 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-19Simplify the interface to LiveVariables::addVirtualRegister(Killed|Dead)Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14997 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-01Start using MBB numbers directly instead of going through the live variablesChris Lattner
map. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14518 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-02Adjust to new TargetMachine interfaceChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13956 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-12Fix a really nasty bug from my changes on Monday to PHIElim. These changesChris Lattner
broke obsequi and a lot of other things. It all boiled down to MBB being overloaded in an inner scope and me confusing it with the one in the outer scope. Ugh! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13517 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-10Switch this from using an std::map to using a DenseMap. This speeds upChris Lattner
phi-elimination from 0.6 to 0.54s on kc++. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13454 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-10Use a new VRegPHIUseCount to compute uses of PHI values by other phi valuesChris Lattner
in the basic block being processed. This fixes PhiElimination on kimwitu++ from taking 105s to taking a much more reasonable 0.6s (in a debug build). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13453 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-10Now that we use an ilist of machine instructions, iterators are more robustChris Lattner
than before. Because this is the case, we can compute the first non-phi instruction once when de-phi'ing a block. This shaves ~4s off of phielimination of _Z7yyparsev in kimwitu++ from 109s -> 105s. There are still much more important gains to come. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13452 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-01Operate on the Machine CFG instead of on the LLVM CFGChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13302 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-31MachineBasicBlock::remove should not modify the iterator passed inChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12571 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23Finegrainify namespacificationChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11757 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23Refactor rewinding code for finding the first terminator of a basicAlkis Evlogimenos
block into MachineBasicBlock::getFirstTerminator(). This also fixes a bug in the implementation of the above in both RegAllocLocal and InstrSched, where instructions where added after the terminator if the basic block's only instruction was a terminator (it shouldn't matter for RegAllocLocal since this case never occurs in practice). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11748 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-14Use newly added next() and prior() utility functions.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11430 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-13Remove getAllocatedRegNum(). Use getReg() instead.Alkis Evlogimenos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11393 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-12Change MachineBasicBlock's vector of MachineInstr pointers into anAlkis Evlogimenos
ilist of MachineInstr objects. This allows constant time removal and insertion of MachineInstr instances from anywhere in each MachineBasicBlock. It also allows for constant time splicing of MachineInstrs into or out of MachineBasicBlocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11340 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-10Do not use MachineOperand::isVirtualRegister either!Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11283 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-14Change interface of MachineOperand as follows:Alkis Evlogimenos
a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse() b) add isUse(), isDef() c) rename opHiBits32() to isHiBits32(), opLoBits32() to isLoBits32(), opHiBits64() to isHiBits64(), opLoBits64() to isLoBits64(). This results to much more readable code, for example compare "op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used very often in the code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10461 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-11Put all LLVM code into the llvm namespace, as per bug 109.Brian Gaeke
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8
2003-10-20Added LLVM project notice to the top of every C++ source file.John Criswell
Header files will be on the way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
2003-07-26Const correctness fixesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7349 91177308-0d34-0410-b5e6-96231b3b80d8
2003-06-05Fix bug: Jello/2003-06-04-bzip2-bug.llChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6624 91177308-0d34-0410-b5e6-96231b3b80d8
2003-05-27(1) Added special register class containing (for now) %fsr.Vikram S. Adve
Fixed spilling of %fcc[0-3] which are part of %fsr. (2) Moved some machine-independent reg-class code to class TargetRegInfo from SparcReg{Class,}Info. (3) Renamed MachienOperand::opIsDef to MachineOperand::opIsDefOnly() and related functions and flags. Fixed several bugs where only "isDef" was being checked, not "isDefAndUse". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6341 91177308-0d34-0410-b5e6-96231b3b80d8
2003-05-12Use a kill, not a dead definition, update commentChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6131 91177308-0d34-0410-b5e6-96231b3b80d8
2003-05-12* Keep LiveVariable information more up-to-date and consistentChris Lattner
* *** Finally mark values that are inputs to PHIs as killed when appropriate. This should make the generated code quite a bit better. For example, the local-ra will not have to spill PHI inputs at the end of predecessor BB's anymore. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6117 91177308-0d34-0410-b5e6-96231b3b80d8
2003-05-12Fix bug where we could iterate off the end of a basic blockChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6116 91177308-0d34-0410-b5e6-96231b3b80d8
2003-05-12Fix N^2 algorithmChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6112 91177308-0d34-0410-b5e6-96231b3b80d8
2003-05-12* Fix several commentsChris Lattner
* Update LiveVar info better, fixing bug: Jello/2003-05-11-PHIRegAllocBug.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6110 91177308-0d34-0410-b5e6-96231b3b80d8
2003-01-16Fix problems with empty basic blocksChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5326 91177308-0d34-0410-b5e6-96231b3b80d8
2003-01-14Rename MachineInstrInfo -> TargetInstrInfoChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5272 91177308-0d34-0410-b5e6-96231b3b80d8
2003-01-13New filesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5262 91177308-0d34-0410-b5e6-96231b3b80d8
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