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* Another fix to prevent debug info from affecting codegen. rdar://7797940Jim Grosbach2010-06-041-0/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105470 91177308-0d34-0410-b5e6-96231b3b80d8
* more dbg_value adjustments so debug info doesn't affect codegenJim Grosbach2010-06-041-2/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105454 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed a bug during widening where we would avoid legalizing a node. When weMon P Wang2010-06-041-31/+36
| | | | | | | | | | replace an OpA with a widened OpB, it is possible to get new uses of OpA due to CSE when recursively updating nodes. Since OpA has been processed, the new uses are not examined again. The patch checks if this occurred and it it did, updates the new uses of OpA to use OpB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105453 91177308-0d34-0410-b5e6-96231b3b80d8
* fix typoJim Grosbach2010-06-041-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105441 91177308-0d34-0410-b5e6-96231b3b80d8
* For NEON vectors with 32- or 64-bit elements, select BUILD_VECTORs andBob Wilson2010-06-043-31/+75
| | | | | | | | | | | | VECTOR_SHUFFLEs to REG_SEQUENCE instructions. The standard ISD::BUILD_VECTOR node corresponds closely to REG_SEQUENCE but I couldn't use it here because its operands do not get legalized. That is pretty awful, but I guess it makes sense for other targets. Instead, I have added an ARM-specific version of BUILD_VECTOR that will have its operands properly legalized. This fixes the rest of Radar 7872877. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105439 91177308-0d34-0410-b5e6-96231b3b80d8
* Add some missing checks in TwoAddressInstructionPass::CoalesceExtSubRegs.Bob Wilson2010-06-031-4/+21
| | | | | | | | | | | | Check that all the instructions are in the same basic block, that the EXTRACT_SUBREGs write to the same subregs that are being extracted, and that the source and destination registers are in the same regclass. Some of these constraints can be relaxed with a bit more work. Jakob suggested that the loop that checks for subregs when NewSubIdx != 0 should use the "nodbg" iterator, so I made that change here, too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105437 91177308-0d34-0410-b5e6-96231b3b80d8
* Cleanup 80-column and trim trailing whitespaceJim Grosbach2010-06-031-33/+33
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105435 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach the ARM load-store optimizer to deal with dbg_value instructions.Jim Grosbach2010-06-031-4/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105427 91177308-0d34-0410-b5e6-96231b3b80d8
* Early implementation of tail call for ARM.Dale Johannesen2010-06-035-6/+371
| | | | | | | | | | | A temporary flag -arm-tail-calls defaults to off, so there is no functional change by default. Intrepid users may try this; simple cases work but there are bugs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105413 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix SimplifyDemandedBits' AssertZext logic to demand all the bits. ItDan Gohman2010-06-031-4/+8
| | | | | | | needs to demand the high bits because it's asserting that they're zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105406 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert 105308.Bob Wilson2010-06-031-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105399 91177308-0d34-0410-b5e6-96231b3b80d8
* Machine sink could potentially sink instructions into a block where the physicalBill Wendling2010-06-031-4/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | registers it defines then interfere with an existing preg live range. For instance, if we had something like these machine instructions: BB#0 ... = imul ... EFLAGS<imp-def,dead> test ..., EFLAGS<imp-def> jcc BB#2 EFLAGS<imp-use> BB#1 ... ; fallthrough to BB#2 BB#2 ... ; No code that defines EFLAGS jcc ... EFLAGS<imp-use> Machine sink will come along, see that imul implicitly defines EFLAGS, but because it's "dead", it assumes that it can move imul into BB#2. But when it does, imul's "dead" imp-def of EFLAGS is raised from the dead (a zombie) and messes up the condition code for the jump (and pretty much anything else which relies upon it being correct). The solution is to know which pregs are live going into a basic block. However, that information isn't calculated at this point. Nor does the LiveVariables pass take into account non-allocatable physical registers. In lieu of this, we do a *very* conservative pass through the basic block to determine if a preg is live coming out of it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105387 91177308-0d34-0410-b5e6-96231b3b80d8
* Add first pass at darwin tls compiler support.Eric Christopher2010-06-038-24/+168
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105381 91177308-0d34-0410-b5e6-96231b3b80d8
* One underscore, not two.Eric Christopher2010-06-031-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105379 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement expansion in type legalization for add/sub with overflow. TheEli Friedman2010-06-032-0/+73
| | | | | | | | | | | | expansion is the same as that used by LegalizeDAG. The resulting code sucks in terms of performance/codesize on x86-32 for a 64-bit operation; I haven't looked into whether different expansions might be better in general. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105378 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove some already-fixed README entries.Eli Friedman2010-06-031-86/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105377 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove README entry which no longer compiles to something sane.Eli Friedman2010-06-031-56/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105376 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove a fixed item, update a couple partially-fixed items.Eli Friedman2010-06-031-81/+22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105375 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the fast register allocator by default for -O0 builds.Jakob Stoklund Olesen2010-06-031-1/+1
| | | | | | This affects both llvm-gcc and clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105372 91177308-0d34-0410-b5e6-96231b3b80d8
* Use readsWritesVirtualRegister instead of counting uses and defs when insertingJakob Stoklund Olesen2010-06-031-46/+8
| | | | | | | | | | | | | spills and reloads. This means that a partial define of a register causes a reload so the other parts of the register are preserved. The reload can be prevented by adding an <imp-def> operand for the full register. This is already done by the coalescer and live interval analysis where relevant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105369 91177308-0d34-0410-b5e6-96231b3b80d8
* Add full register <imp-def> operands when the coalescer is creating partialJakob Stoklund Olesen2010-06-021-50/+50
| | | | | | | | | register updates. These operands tell the spiller that the other parts of the partially defined register are don't-care, and a reload is not necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105361 91177308-0d34-0410-b5e6-96231b3b80d8
* Speedup bitcode writer. Do not walk all values for all functions to emit ↵Devang Patel2010-06-023-9/+16
| | | | | | function local metadata. In one testcase, probably worst case scenario, the 70x speed up is seen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105360 91177308-0d34-0410-b5e6-96231b3b80d8
* Compulsive reformating. No functionalitical changes.Bill Wendling2010-06-021-11/+19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105359 91177308-0d34-0410-b5e6-96231b3b80d8
* Slightly change the meaning of the reMaterialize target hook when the originalJakob Stoklund Olesen2010-06-0212-38/+38
| | | | | | | | | | | | | | | | | | | | | | | instruction defines subregisters. Any existing subreg indices on the original instruction are preserved or composed with the new subreg index. Also substitute multiple operands mentioning the original register by using the new MachineInstr::substituteRegister() function. This is necessary because there will soon be <imp-def> operands added to non read-modify-write partial definitions. This instruction: %reg1234:foo = FLAP %reg1234<imp-def> will reMaterialize(%reg3333, bar) like this: %reg3333:bar-foo = FLAP %reg333:bar<imp-def> Finally, replace the TargetRegisterInfo pointer argument with a reference to indicate that it cannot be NULL. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105358 91177308-0d34-0410-b5e6-96231b3b80d8
* Clean up 80 column violations. No functional change.Jim Grosbach2010-06-0219-50/+64
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105350 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the TargetRegisterClass member from CalleeSavedInfoRafael Espindola2010-06-029-55/+63
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105344 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix comment so it doesn't include comments which are irrelevant to the x86Eli Friedman2010-06-021-9/+5
| | | | | | | | backend. Add a FIXME noting what can be fixed here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105342 91177308-0d34-0410-b5e6-96231b3b80d8
* Use comments to document non-obvious code rather thanDan Gohman2010-06-021-0/+11
| | | | | | | mailing list archives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105341 91177308-0d34-0410-b5e6-96231b3b80d8
* Skip identical instruction while calculating DBG_VALUE range.Devang Patel2010-06-021-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105340 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename canCombinedSubRegIndex method to something more grammatically correctBob Wilson2010-06-023-11/+12
| | | | | | | and tidy up the comment describing it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105339 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace ARM's getCalleeSavedRegClasses with a simpler solutionRafael Espindola2010-06-022-94/+40
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105335 91177308-0d34-0410-b5e6-96231b3b80d8
* Use local small vector.Devang Patel2010-06-022-4/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105332 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused function.Rafael Espindola2010-06-022-56/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105325 91177308-0d34-0410-b5e6-96231b3b80d8
* Not all entries in the range will have an SUnit. Check for that when lookingJim Grosbach2010-06-022-0/+2
| | | | | | for debug information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105324 91177308-0d34-0410-b5e6-96231b3b80d8
* cleanupRafael Espindola2010-06-0222-352/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105322 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove uses of getCalleeSavedRegClasses from outside theRafael Espindola2010-06-022-7/+22
| | | | | | | backends and removes the virtual declaration. With that out of the way I should be able to cleanup one backend at a time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105321 91177308-0d34-0410-b5e6-96231b3b80d8
* Enable machine cse of instructions which define physical registers.Evan Cheng2010-06-021-4/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105308 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't try to custom-lower 64-bit add-with-overflow and friends on x86-32; theEli Friedman2010-06-021-5/+7
| | | | | | | | | | | x86 backend currently doesn't know how to handle them. This doesn't really fix anything because LegalizeTypes doesn't know how to handle them either. We do get a better error message, though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105305 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix an obvious mistake: don't change the operands until all of them have beenBob Wilson2010-06-021-2/+0
| | | | | | | checked and it is safe to proceed with the changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105304 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove outdated README entries.Eli Friedman2010-06-021-140/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105303 91177308-0d34-0410-b5e6-96231b3b80d8
* Update debug information when breaking anti-dependencies. rdar://7759363Jim Grosbach2010-06-012-1/+31
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105300 91177308-0d34-0410-b5e6-96231b3b80d8
* Properly compose subregister indices when coalescing.Jakob Stoklund Olesen2010-06-012-14/+3
| | | | | | | The comment about ordering of subreg indices is no longer true. This exposed a bug in the new substVirtReg method that is also fixed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105294 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused codeJim Grosbach2010-06-011-64/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105293 91177308-0d34-0410-b5e6-96231b3b80d8
* Ignore line number of debug value in undefined register.Devang Patel2010-06-011-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105292 91177308-0d34-0410-b5e6-96231b3b80d8
* fix think-oJim Grosbach2010-06-011-6/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105291 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the allocation of shadow space for the Win64 calling conventionDan Gohman2010-06-011-0/+6
| | | | | | | in X86FastISel. Patch by Jan Sjodin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105290 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify things a bit more. Fix prototype to use SmallVectorImpl andJim Grosbach2010-06-011-17/+17
| | | | | | change a few SmallVectors to vanilla C arrays. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105289 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the noalias checking so that it doesn't worry aboutDan Gohman2010-06-011-12/+12
| | | | | | | an argument aliasing itself. Thanks Duncan! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105288 91177308-0d34-0410-b5e6-96231b3b80d8
* Keep track of incoming debug value of unused argument.Devang Patel2010-06-012-1/+21
| | | | | | | Radar 7927666. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105285 91177308-0d34-0410-b5e6-96231b3b80d8
* Fill in missing support for ISD::FEXP, ISD::FPOWI, and friends.Dan Gohman2010-06-013-3/+29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105283 91177308-0d34-0410-b5e6-96231b3b80d8
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