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* Add a target hook to allow changing the tail duplication limit based on theBob Wilson2009-11-181-4/+5
| | | | | | | | | contents of the block to be duplicated. Use this for ARM Cortex A8/9 to be more aggressive tail duplicating indirect branches, since it makes it much more likely that they will be predicted in the branch target buffer. Testcase coming soon. llvm-svn: 89187
* Fix inverted test and add testcase from failing self-host.Jakob Stoklund Olesen2009-11-181-9/+7
| | | | llvm-svn: 89167
* Disable -split-phi-edges to unbreak the buildbotsJakob Stoklund Olesen2009-11-171-1/+1
| | | | llvm-svn: 89142
* Never call UpdateTerminator() when AnalyzeBranch would fail.Jakob Stoklund Olesen2009-11-171-1/+13
| | | | llvm-svn: 89139
* Add a WriteAsOperand for MachineBasicBlock so MachineLoopInfo dump looks sane.Evan Cheng2009-11-171-0/+5
| | | | llvm-svn: 89130
* Fix comment.Evan Cheng2009-11-171-3/+3
| | | | llvm-svn: 89129
* Enable -split-phi-edges by default, except when -regalloc=local.Jakob Stoklund Olesen2009-11-171-3/+15
| | | | | | | The local register allocator doesn't like it when LiveVariables is run. We should also disable edge splitting under -O0, but that has to wait a bit. llvm-svn: 89125
* Remove a special case for tail merging that seems to be both broken andBob Wilson2009-11-171-33/+0
| | | | | | | | | | | unnecessary. It is broken because the "isIdenticalTo" check should be negated. If that is fixed, this code causes the CodeGen/X86/tail-opts.ll test to fail, in the dont_merge_oddly function. And, I confirmed that the regression is real -- the generated code is worse. As far as I can tell, that tail-opts.ll test is checking for what this code is supposed to handle and we're doing the right thing anyway. llvm-svn: 89121
* Set MadeChange instead of MadeChangeThisIteration.Dan Gohman2009-11-171-1/+1
| | | | llvm-svn: 89114
* Update a comment, now that tail duplication happens after other branchBob Wilson2009-11-171-2/+2
| | | | | | folding optimizations. llvm-svn: 89109
* Perform tail duplication only once, after tail merging is complete.Bob Wilson2009-11-172-33/+68
| | | | | | | It was too difficult to keep the heuristics for merging and duplication consistent. llvm-svn: 89105
* Revert 89021. It's miscompiling llvm-gcc driver driver at -O0.Evan Cheng2009-11-171-1/+1
| | | | llvm-svn: 89082
* Remove VISIBILITY_HIDDEN from the classes in this directory. Fixes bug 5507.Nick Lewycky2009-11-175-19/+18
| | | | llvm-svn: 89075
* Revert r88939.Nick Lewycky2009-11-171-2/+2
| | | | llvm-svn: 89066
* Refactor the code that creates the "dot-label" difference. This may be used inBill Wendling2009-11-172-18/+29
| | | | | | more than one place. No intended functionality change. llvm-svn: 89024
* Enable -split-phi-edges by defaultJakob Stoklund Olesen2009-11-171-1/+1
| | | | llvm-svn: 89021
* Remove the optimizations that convert BRCOND and BR_CC intoDan Gohman2009-11-171-17/+12
| | | | | | | | | | unconditional branches or fallthroghes. Instcombine/SimplifyCFG should be simplifying branches with known conditions. This fixes some problems caused by these transformations not updating the MachineBasicBlock CFG. llvm-svn: 89017
* Initialize the new AsmPrinterFlags field to 0, fixing uses ofDan Gohman2009-11-161-6/+8
| | | | | | uninitialized memory. llvm-svn: 88985
* Revert r88939.Devang Patel2009-11-161-2/+2
| | | | llvm-svn: 88973
* Sink a #include <map> to where it's actually needed.Dan Gohman2009-11-161-0/+1
| | | | llvm-svn: 88956
* Fix a typo in a comment.Dan Gohman2009-11-162-2/+2
| | | | llvm-svn: 88953
* Fix a comment.Bob Wilson2009-11-161-1/+1
| | | | llvm-svn: 88940
* Add VISIBILITY_HIDDEN marker.Devang Patel2009-11-161-2/+2
| | | | llvm-svn: 88939
* Fix some comments.Bob Wilson2009-11-161-5/+4
| | | | llvm-svn: 88932
* Whitespace: be consistent with pointer syntax.Bob Wilson2009-11-161-6/+6
| | | | llvm-svn: 88929
* Clean up whitespace.Bob Wilson2009-11-161-6/+6
| | | | llvm-svn: 88927
* Support spill comments.David Greene2009-11-161-0/+52
| | | | | | | | Have the asm printer emit a comment if an instruction is a spill or reload and have the spiller mark copies it introdues so the asm printer can also annotate those. llvm-svn: 88911
* Check if subreg index is zero.Evan Cheng2009-11-161-1/+3
| | | | llvm-svn: 88899
* For some targets, a copy can use a register multiple times, e.g. ppc.Evan Cheng2009-11-161-0/+5
| | | | llvm-svn: 88895
* Fixes the bug exposed by Anton's test case in PR 5495:Lang Hames2009-11-161-0/+4
| | | | | | | Make sure when ProcessImplicitDefs removes a copy which kills its source reg that it removes the copy from said reg's Kills list. llvm-svn: 88881
* Fix for the original bug in PR5495 - Look at uses as well as defs when ↵Lang Hames2009-11-161-5/+5
| | | | | | | | determining the PHI-copy insert point. - Patch by Andrew Canis! llvm-svn: 88880
* Added an assert to the PBQP allocator to catch infinite cost solutions which ↵Lang Hames2009-11-151-0/+5
| | | | | | might otherwise lead to miscompilations. llvm-svn: 88829
* Do not merge jump tables this early. Branch folding will do any necessaryJim Grosbach2009-11-141-4/+0
| | | | | | | merges, and until then, it's useful to keep the tables separate for ease of manipulation. llvm-svn: 88806
* Add function to replace a destination MBB in a single jump tableJim Grosbach2009-11-141-8/+19
| | | | llvm-svn: 88804
* revert 88761 as it fails builds.Sanjiv Gupta2009-11-141-1/+1
| | | | llvm-svn: 88762
* Fix debug info crashes for PIC16.Sanjiv Gupta2009-11-141-1/+1
| | | | llvm-svn: 88761
* Added getSubRegIndex(A,B) that returns subreg index of A to B. Use it to ↵Evan Cheng2009-11-141-5/+2
| | | | | | replace broken code in VirtRegRewriter. llvm-svn: 88753
* - Change TargetInstrInfo::reMaterialize to pass in TargetRegisterInfo.Evan Cheng2009-11-145-8/+13
| | | | | | | | - If destination is a physical register and it has a subreg index, use the sub-register instead. This fixes PR5423. llvm-svn: 88745
* Fix PR5412: Fix an inverted check and another missing sub-register check.Evan Cheng2009-11-141-9/+30
| | | | llvm-svn: 88738
* Enable the tail call optimization when the caller returns undef.Dan Gohman2009-11-141-0/+4
| | | | llvm-svn: 88737
* Fix bug in -split-phi-edges.Jakob Stoklund Olesen2009-11-141-3/+14
| | | | | | | | | | When splitting an edge after a machine basic block with fall-through, we forgot to insert a jump instruction. Fix this by calling updateTerminator() on the fall-through block when relevant. Also be more precise in PHIElimination::isLiveIn. llvm-svn: 88728
* Update MachineDominator informationJakob Stoklund Olesen2009-11-141-6/+9
| | | | llvm-svn: 88727
* Added an API to the SlotIndexes pass to allow new instructions to be ↵Lang Hames2009-11-143-89/+31
| | | | | | | | inserted into the numbering. PreAllocSplitting is now using this API to insert code. llvm-svn: 88725
* Fix PR5411. Bug in UpdateKills. A reg def partially define its super-registers.Evan Cheng2009-11-131-0/+4
| | | | llvm-svn: 88719
* Fix PHIElimination optimization that uses MBB->getBasicBlock.Jakob Stoklund Olesen2009-11-132-34/+23
| | | | | | | | | | | The BasicBlock associated with a MachineBasicBlock does not necessarily correspond to the code in the MBB. Don't insert a new IR BasicBlock when splitting critical edges. We are not supposed to modify the IR during codegen, and we should be able to do just fine with a NULL BB. llvm-svn: 88707
* Add MachineFunction::verify() to call the machine code verifier directly.Jakob Stoklund Olesen2009-11-131-0/+4
| | | | llvm-svn: 88706
* Fix polarity of a CFG check in machine verifier.Jakob Stoklund Olesen2009-11-131-5/+14
| | | | llvm-svn: 88704
* Use .data() instead of .c_str() when nul-termination is not needed.Dan Gohman2009-11-131-1/+1
| | | | llvm-svn: 88703
* Move DebugInfo checks into EmitComments and remove them fromDavid Greene2009-11-131-15/+23
| | | | | | | | target-specific AsmPrinters. Not all comments need DebugInfo. Re-enable the line numbers comment test. llvm-svn: 88697
* When optimizing for size, don't tail-merge unless it's likely to be aDan Gohman2009-11-131-9/+12
| | | | | | | | | | code-size win, and not when it's only likely to be code-size neutral, such as when only a single instruction would be eliminated and a new branch would be required. This fixes rdar://7392894. llvm-svn: 88692
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