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path: root/lib/CodeGen/TailDuplication.cpp
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2011-01-28- Stop simplifycfg from duplicating "ret" instructions into unconditionalEvan Cheng
branches. PR8575, rdar://5134905, rdar://8911460. - Allow codegen tail duplication to dup small return blocks after register allocation is done. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124462 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-10Simplify a bunch of isVirtualRegister() and isPhysicalRegister() logic.Jakob Stoklund Olesen
These functions not longer assert when passed 0, but simply return false instead. No functional change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123155 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
2010-08-06Revert r110396 to fix buildbots.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Don'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
2010-07-16Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway.Jakob Stoklund Olesen
TII::isMoveInstr is going tobe completely removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108507 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-10Replace copyRegToReg with COPY everywhere in lib/CodeGen except for FastISel.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108062 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-06Add a DebugLoc argument to TargetInstrInfo::copyRegToReg, so that itDan Gohman
doesn't have to guess. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103194 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-16Ignore debug value instructions while analyzing BB for tail duplication.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98675 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-14eliminate InvalidateLabel and LabelIDList from MMI and replaceChris Lattner
them with a counter. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98462 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-11Reuse operand location when updating PHI instructions.Jakob Stoklund Olesen
Calling RemoveOperand is very expensive on huge PHI instructions. This makes early tail duplication run twice as fast on the Firefox JavaScript interpreter. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95832 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-09move target-independent opcodes out of TargetInstrInfoChris Lattner
into TargetOpcodes.h. #include the new TargetOpcodes.h into MachineInstr. Add new inline accessors (like isPHI()) to MachineInstr, and start using them throughout the codebase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95687 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-16Treat indirect branches specially only during pre-regalloc tail duplication,Bob Wilson
not during the later post-alloc tail duplication. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93600 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-15Simplify logic. Any functional change is unintended.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93540 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-15Change pre-regalloc tail duplication to only duplicate indirect branch blocks.Bob Wilson
The pre-regalloc pass caused some regressions in both compile time and performance of the generated code, and it did not improve performance, except for indirect branches. I also moved the check for single-block loops to speed up the common case when running the taildup pass before reg allocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93505 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-06Add Target hook to duplicate machine instructions.Jakob Stoklund Olesen
Some instructions refer to unique labels, and so cannot be trivially cloned with CloneMachineInstr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92873 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-05Change errs() to dbgs().David Greene
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92582 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-15Tail duplication should zap a copy it inserted for SSA update if the copy is ↵Evan Cheng
the only use of its source. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91390 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-07Delete code accidentally left behind.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90804 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-07Pre-regalloc tale duplication. Work in progress.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90759 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04Handle recursive PHI's.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90575 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04Add a pre-regalloc tail duplication pass.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90567 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03Teach tail duplication to update SSA form. Work in progress.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90432 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02Don't count PHI instructions toward the limit for tail duplicating a block.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90326 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30Reprioritize tests for tail duplication to be aggressive about indirectBob Wilson
branches even when optimizing for code size. Unless we find evidence to the contrary in the future, the special treatment for indirect branches does not have a significant effect on code size, and performance still matters with -Os. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90147 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30Remove isProfitableToDuplicateIndirectBranch target hook. It is profitableBob Wilson
for all the processors where I have tried it, and even when it might not help performance, the cost is quite low. The opportunities for duplicating indirect branches are limited by other factors so code size does not change much due to tail duplicating indirect branches aggressively. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90144 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Rename new TailDuplicationPass to avoid name conflict with the old one.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89968 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Split tail duplication into a separate pass. This is needed to avoidBob Wilson
running tail duplication when doing branch folding for if-conversion, and we also want to be able to run tail duplication earlier to fix some reg alloc problems. Move the CanFallThrough function from BranchFolding to MachineBasicBlock so that it can be shared by TailDuplication. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89904 91177308-0d34-0410-b5e6-96231b3b80d8
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