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2011-11-07Don't introduce custom nodes after legalization in TargetLowering::BuildSDIV()Richard Osborne
and TargetLowering::BuildUDIV(). Fixes PR11283 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143964 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Remove unnecessary addition to API. Replace with something much simpler.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143925 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Add new files to cmake.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143924 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Add the support code to enable the dwarf accelerator tables. Upcoming patchesEric Christopher
to fix the types section (all types, not just global types), and testcases. The code to do the final emission is disabled by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143923 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Add a new dwarf accelerator table prototype with the goal of replacingEric Christopher
the pubnames and pubtypes tables. LLDB can currently use this format and a full spec is forthcoming and submission for standardization is planned. A basic summary: The dwarf accelerator tables are an indirect hash table optimized for null lookup rather than access to known data. They are output into an on-disk format that looks like this: .-------------. | HEADER | |-------------| | BUCKETS | |-------------| | HASHES | |-------------| | OFFSETS | |-------------| | DATA | `-------------' where the header contains a magic number, version, type of hash function, the number of buckets, total number of hashes, and room for a special struct of data and the length of that struct. The buckets contain an index (e.g. 6) into the hashes array. The hashes section contains all of the 32-bit hash values in contiguous memory, and the offsets contain the offset into the data area for the particular hash. For a lookup example, we could hash a function name and take it modulo the number of buckets giving us our bucket. From there we take the bucket value as an index into the hashes table and look at each successive hash as long as the hash value is still the same modulo result (bucket value) as earlier. If we have a match we look at that same entry in the offsets table and grab the offset in the data for our final match. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143921 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Expose a way to get the beginning of the dwarf string section.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143920 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Fix up comment.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143919 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Typo.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143918 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-05Add an option to pad an uleb128 to MCObjectWriter and remove the uleb128 ↵Benjamin Kramer
encoding from the DWARF asm printer. As a side effect we now print dwarf ulebs with .ascii directives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143809 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-05Add more PRI.64 macros for MSVC and use them throughout the codebase.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143799 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-04Added missing &. Fixes <rdar://problem/10393723>Pete Cooper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143753 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-04Emit declarations before definitions if they are available. This causes ↵Rafael Espindola
DW_AT_specification to point back in the file in the included testcase. Fixes PR11300. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143726 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-03Reapply r143206, with fixes. Disallow physical register lifetimesDan Gohman
across calls, and only check for nested dependences on the special call-sequence-resource register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143660 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-03Reverted r143600 - selector reference changePete Cooper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143646 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-03build: Add initial cut at LLVMBuild.txt files.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143634 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-03Treat objc selector reference globals as invariant so that MachineLICM can ↵Pete Cooper
hoist them out of loops. Fixes <rdar://problem/6027699> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143600 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-02An array of chars of length 8 will also cause the stack protector to be insertedBill Wendling
into the function. Reflect that here so that the array will be placed next to the SP. <rdar://problem/10128329> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143590 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-02Don't emit a directory entry for the value in DW_AT_comp_dir, that is alwaysNick Lewycky
implied by directory index zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143570 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-02Begin collecting some of the statistics for block placement discussed onChandler Carruth
the mailing list. Suggestions for other statistics to collect would be awesome. =] Currently these are implemented as a separate pass guarded by a separate flag. I'm not thrilled by that, but I wanted to be able to collect the statistics for the old code placement as well as the new in order to have a point of comparison. I'm planning on folding them into the single pass if / when there is only one pass of interest. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143537 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-01Update split candidate correctly when interference cache is full.Jakob Stoklund Olesen
No test case, spotted by inspection. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143407 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-31Cleanup. Document. Make sure that this build_vector optimization only runs ↵Nadav Rotem
before the op legalizer and that the used type is legal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143358 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-30Silence compiler warning.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143308 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-29Add a new DAGCombine optimization for BUILD_VECTOR.Nadav Rotem
If all of the inputs are zero/any_extended, create a new simple BV which can be further optimized by other BV optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143297 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-29Revert r143206, as there are still some failing tests.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143262 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Reapply r143177 and r143179 (reverting r143188), with schedulerDan Gohman
fixes: Use a separate register, instead of SP, as the calling-convention resource, to avoid spurious conflicts with actual uses of SP. Also, fix unscheduling of calling sequences, which can be triggered by pseudo-two-address dependencies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143206 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Dwarf: [PR11022] Fix emitting DW_AT_const_value(>i64), to be ↵NAKAMURA Takumi
host-endian-neutral. Don't assume APInt::getRawData() would hold target-aware endianness nor host-compliant endianness. rawdata[0] holds most lower i64, even on big endian host. FIXME: Add a testcase for big endian target. FIXME: Ditto on CompileUnit::addConstantFPValue() ? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143194 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Use BranchProbability compare operators.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143190 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Speculatively disable Dan's commits 143177 and 143179 to see ifDuncan Sands
it fixes the dragonegg self-host (it looks like gcc is miscompiled). Original commit messages: Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW on every node as it legalizes them. This makes it easier to use hasOneUse() heuristics, since unneeded nodes can be removed from the DAG earlier. Make LegalizeOps visit the DAG in an operands-last order. It previously used operands-first, because LegalizeTypes has to go operands-first, and LegalizeTypes used to be part of LegalizeOps, but they're now split. The operands-last order is more natural for several legalization tasks. For example, it allows lowering code for nodes with floating-point or vector constants to see those constants directly instead of seeing the lowered form (often constant-pool loads). This makes some things somewhat more complicated today, though it ought to allow things to be simpler in the future. It also fixes some bugs exposed by Legalizing using RAUW aggressively. Remove the part of LegalizeOps that attempted to patch up invalid chain operands on libcalls generated by LegalizeTypes, since it doesn't work with the new LegalizeOps traversal order. Instead, define what LegalizeTypes is doing to be correct, and transfer the responsibility of keeping calls from having overlapping calling sequences into the scheduler. Teach the scheduler to model callseq_begin/end pairs as having a physical register definition/use to prevent calls from having overlapping calling sequences. This is also somewhat complicated, though there are ways it might be simplified in the future. This addresses rdar://9816668, rdar://10043614, rdar://8434668, and others. Please direct high-level questions about this patch to management. Delete #if 0 code accidentally left in. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143188 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Always use the string pool, even when it makes the .o larger. This may helpNick Lewycky
tools that read the debug info in the .o files by making the DIE sizes more consistent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143186 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Delete #if 0 code accidentally left in.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143179 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUWDan Gohman
on every node as it legalizes them. This makes it easier to use hasOneUse() heuristics, since unneeded nodes can be removed from the DAG earlier. Make LegalizeOps visit the DAG in an operands-last order. It previously used operands-first, because LegalizeTypes has to go operands-first, and LegalizeTypes used to be part of LegalizeOps, but they're now split. The operands-last order is more natural for several legalization tasks. For example, it allows lowering code for nodes with floating-point or vector constants to see those constants directly instead of seeing the lowered form (often constant-pool loads). This makes some things somewhat more complicated today, though it ought to allow things to be simpler in the future. It also fixes some bugs exposed by Legalizing using RAUW aggressively. Remove the part of LegalizeOps that attempted to patch up invalid chain operands on libcalls generated by LegalizeTypes, since it doesn't work with the new LegalizeOps traversal order. Instead, define what LegalizeTypes is doing to be correct, and transfer the responsibility of keeping calls from having overlapping calling sequences into the scheduler. Teach the scheduler to model callseq_begin/end pairs as having a physical register definition/use to prevent calls from having overlapping calling sequences. This is also somewhat complicated, though there are ways it might be simplified in the future. This addresses rdar://9816668, rdar://10043614, rdar://8434668, and others. Please direct high-level questions about this patch to management. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143177 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-27Teach our Dwarf emission to use the string pool.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143097 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-27Don't crash on 128-bit sdiv by constant. Found by inspection.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143095 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Rename NonScalarIntSafe to something more appropriate.Lang Hames
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143080 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Reflow lines, fix comments for doxygen style, fix whitespace. No functionalityNick Lewycky
change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143074 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Simplify SplitVecRes_UnaryOp by removing all the code that isDuncan Sands
trying to legalize the operand types when only the result type is required to be legalized - the type legalization machinery will get round to the operands later if they need legalizing. There can be a point to legalizing operands in parallel with the result: when this saves compile time or results in better code. There was only one case in which this was true: when the operand is also split, so keep the logic for that bit. As a result of this change, additional operand legalization methods may need to be introduced to handle nodes where the result and operand types can differ, like SIGN_EXTEND, but the testsuite doesn't contain any tests where this is the case. In any case, it seems better to require such methods (and die with an assert if they doesn't exist) than to quietly produce wrong code if we forgot to special case the node in SplitVecRes_UnaryOp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143026 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Don't use floating point to do an integer's job.Jakob Stoklund Olesen
This code makes different decisions when compiled into x87 instructions because of different rounding behavior. That caused phase 2/3 miscompares on 32-bit Linux when the phase 1 compiler was built with gcc (using x87), and the phase 2 compiler was built with clang (using SSE). This fixes PR11200. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143006 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Disable LICM speculation in high register pressure situation again now that ↵Evan Cheng
Devang has fixed other issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143003 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Reapply r142920 with fix:Bill Wendling
An MBB which branches to an EH landing pad shouldn't be considered for tail merging. In SjLj EH, the jump to the landing pad is not done explicitly through a branch statement. The EH landing pad is added as a successor to the throwing BB. Because of that however, the branch folding pass could mistakenly think that it could merge the throwing BB with another BB. This isn't safe to do. <rdar://problem/10334833> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143001 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Remove a couple redundant checks.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142959 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Make assert() message more informative.Jim Grosbach
PR11217. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142956 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Revert commit 142891. Takumi bisected the tablegen miscompilesDuncan Sands
down to this commit. Original commit message: An MBB which branches to an EH landing pad shouldn't be considered for tail merging. In SjLj EH, the jump to the landing pad is not done explicitly through a branch statement. The EH landing pad is added as a successor to the throwing BB. Because of that however, the branch folding pass could mistakenly think that it could merge the throwing BB with another BB. This isn't safe to do. <rdar://problem/10334833> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142920 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Remove dead enum value. There is no DIESectionOffset.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142912 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Remove unused forward decl.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142892 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25An MBB which branches to an EH landing pad shouldn't be considered for tail ↵Bill Wendling
merging. In SjLj EH, the jump to the landing pad is not done explicitly through a branch statement. The EH landing pad is added as a successor to the throwing BB. Because of that however, the branch folding pass could mistakenly think that it could merge the throwing BB with another BB. This isn't safe to do. <rdar://problem/10334833> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142891 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-24Check the visibility of the global variable before placing it into the stubsBill Wendling
table. A hidden variable could potentially end up in both lists. <rdar://problem/10336715> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142869 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-24Really unbreak CMake buildDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142822 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-24Unbreak CMake buildDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142821 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-24Delete the top-down "Latency" scheduler. Top-down scheduling doesn't handleDan Gohman
physreg dependencies, and upcoming codegen changes will require proper physreg dependence handling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142816 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-24Delete the Latency scheduling preference.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142815 91177308-0d34-0410-b5e6-96231b3b80d8
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