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path: root/lib/CodeGen/IfConversion.cpp
AgeCommit message (Collapse)Author
2008-01-29Use empty() instead of comparing size() with zero.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46514 91177308-0d34-0410-b5e6-96231b3b80d8
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 using new predicatesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45689 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07Rename MachineInstr::getInstrDescriptor -> getDesc(), which reflectsChris Lattner
that it is cheap and efficient to get. Move a variety of predicates from TargetInstrInfo into TargetInstrDescriptor, which makes it much easier to query a predicate when you don't have TII around. Now you can use MI->getDesc()->isBranch() instead of going through TII, and this is much more efficient anyway. Not all of the predicates have been moved over yet. Update old code that used MI->getInstrDescriptor()->Flags to use the new predicates in many places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45674 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
2007-07-10Somehow this wasn't committed last time. M_CLOBBERS_PRED is gone.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38495 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-06Teach if-conversion about instructions that were already predicated, e.g. ↵Evan Cheng
conditional move. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37964 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-19Avoid if-converting simple block that ends with unconditional branch or ↵Evan Cheng
fallthrough unless it branches / falls to the 'false' block. Not profitable, may end up increasing code size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37660 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-19Replace TargetInstrInfo::CanBeDuplicated() with a M_NOT_DUPLICABLE bit.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37643 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-18Fix some fragile code wrt CFG edge updating.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37634 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-18Properly remove duplicate instructions as result of diamond if-conversion. ↵Evan Cheng
Other bug fixes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37623 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-16Really turn if-converter loose:Evan Cheng
1. Consider all possible ifcvt cases at once. No longer restricted to bottom up iterative approach. 2. Sort all possible cases based on a cost function. Perform the most profitable ones first invalidate others that target the same blocks. 3. Fixed a number of bugs related to block duplication. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37613 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-15Not every predicable block can be safely duplicated.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37607 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-15MachineInstr::isPredicable() is no longer needed.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37599 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-15Extra edges are deleted later if needed.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37593 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-15Allow small blocks to be duplicated to enable if-conversion.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37590 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-14No really, clear predcessors states.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37581 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-14If BB is predicated, invalidate its predecessor(s) which would if-convert ↵Evan Cheng
it. It needs to be re-analyzed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37580 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-14Fix typo.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37577 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-14Fix some stupid bugs that have effectively disabled if-conversion.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37575 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-13TypoEvan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37566 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-12Now if-converting all 4 variants of triangles.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37565 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-11Restructure code to reduce ifcvt compile time cost.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37543 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-10Fix the build.Reid Spencer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37537 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-09Don't change CFG during analysis stage. Do so during ifcvt and invalidate ↵Evan Cheng
predecessors accordingly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37531 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-08Carefully remove extraneous CFG edges after each ifcvt.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37529 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-08Correct transfer predicate information.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37524 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-08Hidden options to help debugging ifcvt issues.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37523 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-08Allow more cmp / bcc to be predicated; clean up triangle ifcvt checking code.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37518 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-07Only remove the edge from entry to false if false block is merged.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37503 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-07ifcvt a triangle: don't merge ifcvt block with rejoin block if it can fall ↵Evan Cheng
through to it. If merged, the resulting block is not a candidate for iterative ifcvting since it contains both predicated and non-predicated code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37487 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-07Lots of bug fixes. Now finally in a reasonable state.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37485 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-06Quick patch to fix the build, based on what it appears Evan meant to write.Owen Anderson
Evan, please check that this is in fact correct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37471 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-06Lots of bug fixes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37467 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-06If a unconditional branch is added to branch to the false path during ifcvt, ↵Evan Cheng
the predicated block cannot be iteratively ifcvted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37456 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-06Minor statistics counting bug.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37451 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-06Fix a couple of typos and be smarter about order of blocks when ifcvt a diamond.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37449 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-05Fix diamond shape ifcvt bugs.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37444 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-05ReplaceUsesOfBlockWith() can modify the predecessors list.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37441 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-05Do not ifcvt if either true / false path is a backedge. Not profitable in ↵Evan Cheng
almost all cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37440 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-05I had a senior moment.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37433 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-05If the predicated block requires an early exit, end the block there and add ↵Evan Cheng
a unconditional branch to false block. AnalyzeBranch() does not understand early exits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37430 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-05Fix some subtle bugs: bug during succeessor copying; incorrectly updating ↵Evan Cheng
states of ifcvted blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37429 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-04Forgot to check for if iterator reached the end.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37420 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-04Let IfConverter loose. Allow more aggressive subsumptions; reorder basic ↵Evan Cheng
blocks to expose more ifcvt opportunities; code clean up and fixes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37409 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-01Correctly mark early-exit on the false path.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37387 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-01Ifcvt triangle: don't ifcvt 'true' BB if it has other predecessors; don't ↵Evan Cheng
merge 'false' BB if it has other predecessors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37382 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-01Remove a bogus check. Even terminators in a ifcvt need to be predicated. ↵Evan Cheng
Unconditional branches can usually be converted to conditional ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37380 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-01Allow multiple ifcvt candidates to share children blocks; add some debugging ↵Evan Cheng
code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37379 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-31Fix a typo.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37374 91177308-0d34-0410-b5e6-96231b3b80d8
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