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* Use the proper SDK when building iOS sim builds of LLVM and/or Mac OS X builds.Owen Anderson2014-01-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200335 91177308-0d34-0410-b5e6-96231b3b80d8
* fix templates to work with pre c++11Nick Kledzik2014-01-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200333 91177308-0d34-0410-b5e6-96231b3b80d8
* [mips] Fix ELF header flags.Matheus Almeida2014-01-28
| | | | | | | | | As opposed to GCC/GAS the default ABI for Mips64 is n64. Compatibility bit should be set if o32 ABI is used when targeting Mips64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200332 91177308-0d34-0410-b5e6-96231b3b80d8
* Add BumpPtrAllocator::allocateCopy() utilitiesNick Kledzik2014-01-28
| | | | | | | Makes it easy to use BumpPtrAllocator to make a copy of StringRef strings. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200331 91177308-0d34-0410-b5e6-96231b3b80d8
* [NVPTX] Fix emitting aggregate parametersGautam Chakrabarti2014-01-28
| | | | | | | | | | The code was missing the case for aggregate parameters and hence was emitting them as .b0 type. Also fixed a couple of comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200325 91177308-0d34-0410-b5e6-96231b3b80d8
* [X86] Add extra rules for combining vselect dag nodes into movsd.Andrea Di Biagio2014-01-28
| | | | | | | | | | | | | | | | | | | | | | This improves the fix committed at revision 199683 adding the following new target specific combine rules: 1) fold (v4i32: vselect <0,0,-1,-1>, A, B) -> (v4i32 (bitcast (movsd (v2i64 (bitcast A)), (v2i64 (bitcast B))) )) 2) fold (v4f32: vselect <0,0,-1,-1>, A, B) -> (v4f32 (bitcast (movsd (v2f64 (bitcast A)), (v2f64 (bitcast B))) )) 3) fold (v4i32: vselect <-1,-1,0,0>, A, B) -> (v4i32 (bitcast (movsd (v2i64 (bitcast B)), (v2i64 (bitcast A))) )) 4) fold (v4f32: vselect <-1,-1,0,0>, A, B) -> (v4f32 (bitcast (movsd (v2i64 (bitcast B)), (v2i64 (bitcast A))) )) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200324 91177308-0d34-0410-b5e6-96231b3b80d8
* typoAdrian Prantl2014-01-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200323 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix pr14893.Rafael Espindola2014-01-28
| | | | | | | | | | | When simplifycfg moves an instruction, it must drop metadata it doesn't know is still valid with the preconditions changes. In particular, it must drop the range and tbaa metadata. The patch implements this with an utility function to drop all metadata not in a white list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200322 91177308-0d34-0410-b5e6-96231b3b80d8
* The llvm_headers_do_not_build project needs to be excluded from the default ↵Aaron Ballman2014-01-28
| | | | | | | | build, otherwise it gets built (at least in Visual Studio 2013). Thanks to chapuni200000 for help with this in IRC! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200321 91177308-0d34-0410-b5e6-96231b3b80d8
* [DAGCombiner] Avoid introducing an illegal build_vector when folding a ↵Andrea Di Biagio2014-01-28
| | | | | | | | | | | | | | | | | | sign_extend. Make sure that we don't introduce illegal build_vector dag nodes when trying to fold a sign_extend of a build_vector. This fixes a regression introduced by r200234. Added test CodeGen/X86/fold-vector-sext-crash.ll to verify that llc no longer crashes with an assertion failure due to an illegal build_vector of type MVT::v4i64. Thanks to Ilia Filippov for spotting this regression and for providing a reproducible test case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200313 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] llvm_update_compile_flags(name) doesn't require source files. TARGET ↵NAKAMURA Takumi2014-01-28
| | | | | | PROPERTY SOURCES has them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200311 91177308-0d34-0410-b5e6-96231b3b80d8
* Provide a stub Target Streamer implementation for PPC MachOIain Sandoe2014-01-28
| | | | | | | | At present, this handles .tc (error) and needs to be expanded to deal properly with .machine git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200309 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Prune CMAKE_CXX_FLAGS stuff in llvm_process_sources.NAKAMURA Takumi2014-01-28
| | | | | | It is the final step to deprecate contextual CMAKE_CXX_FLAGS. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200303 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Enhance llvm_update_compile_flags(name sources) to handle ↵NAKAMURA Takumi2014-01-28
| | | | | | | | | | | | | | | | LLVM_REQUIRES_EH and LLVM_REQUIRES_RTTI. LLVM_REQUIRES_EH implies LLVM_REQUIRES_RTTI. It is as same behavior as Makefile.rule's. llvm/examples/ExceptionDemo is affected. (It was built with -fno-rtti.) For MSVC, Remove flags like "/EHsc /GR" in HandleLLVMOptions, or CL.EXE complains with flags like "/GR /GR-". llvm_update_compile_flags() updates source file property if the target contains *.c. COMPILE_FLAGS in target properties affects both C++ and C! LLVM_NO_RTTI is deprecated. It was introduced by me and was my mistake. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200301 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Apply -ffunction-data-sectinos not only to CMAKE_CXX_FLAGS, but also ↵NAKAMURA Takumi2014-01-28
| | | | | | to CMAKE_C_FLAGS. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200300 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Move -ffunction-data-sections stuff to HandleLLVMOptions.NAKAMURA Takumi2014-01-28
| | | | | | | | With this tweaks, also unittests are compiled with -ffunction-sections. It's hard to control contextual CMAKE_CXX_FLAGS. We should get rid of twiddling it as possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200299 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Let llvm_process_sources check not only *.cpp but also *.c.NAKAMURA Takumi2014-01-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200298 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Put lli-child-target into the Folder "Misc".NAKAMURA Takumi2014-01-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200297 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorizer] Completely disable the block frequency guidance of the loopChandler Carruth2014-01-28
| | | | | | | | | | | | | | | vectorizer, placing it behind an off-by-default flag. It turns out that block frequency isn't what we want at all, here or elsewhere. This has been I think a nagging feeling for several of us working with it, but Arnold has given some really nice simple examples where the results are so comprehensively wrong that they aren't useful. I'm planning to email the dev list with a summary of why its not really useful and a couple of ideas about how to better structure these types of heuristics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200294 91177308-0d34-0410-b5e6-96231b3b80d8
* Handle spilling the PPC GPRC_NOR0 register classHal Finkel2014-01-28
| | | | | | | GPRC_NOR0 is not a subclass of GPRC (because it also contains the ZERO pseudo register). As a result, we also need to check for it in the spilling code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200288 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve handling of EnforceSmallerThan. Remove all types that are smaller ↵Craig Topper2014-01-28
| | | | | | from the larger set not just the smallest type from the smaller set. Ensure 'smaller' vectors have the same or fewer total bits. Similar for 'larger' vectors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200287 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Add a .debug section that we'll soon use to emit debug info into COFF filesTimur Iskhodzhanov2014-01-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200285 91177308-0d34-0410-b5e6-96231b3b80d8
* R600/SI: Add pattern for truncating i32 to i1Michel Danzer2014-01-28
| | | | | | | | Fixes half a dozen piglit tests with radeonsi. Reviewed-by: Tom Stellard <thomas.stellard@amd.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200283 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the DWARF EH encodings for Sparc PIC code.Jakob Stoklund Olesen2014-01-28
| | | | | | | Also emit the stubs that were generated for references to typeinfo symbols. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200282 91177308-0d34-0410-b5e6-96231b3b80d8
* Update optimization passes to handle inalloca argumentsReid Kleckner2014-01-28
| | | | | | | | | | | | | | | Summary: I searched Transforms/ and Analysis/ for 'ByVal' and updated those call sites to check for inalloca if appropriate. I added tests for any change that would allow an optimization to fire on inalloca. Reviewers: nlewycky Differential Revision: http://llvm-reviews.chandlerc.com/D2449 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200281 91177308-0d34-0410-b5e6-96231b3b80d8
* x86: add implicit defs for cpuidReid Kleckner2014-01-28
| | | | | | | This avoids miscompiling MS inline asm in LLVM where we have to infer clobbers. Test case forthcoming in Clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200279 91177308-0d34-0410-b5e6-96231b3b80d8
* [LPM] Fix PR18616 where the shifts to the loop pass manager to extractChandler Carruth2014-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | LCSSA from it caused a crasher with the LoopUnroll pass. This crasher is really nasty. We destroy LCSSA form in a suprising way. When unrolling a loop into an outer loop, we not only need to restore LCSSA form for the outer loop, but for all children of the outer loop. This is somewhat obvious in retrospect, but hey! While this seems pretty heavy-handed, it's not that bad. Fundamentally, we only do this when we unroll a loop, which is already a heavyweight operation. We're unrolling all of these hypothetical inner loops as well, so their size and complexity is already on the critical path. This is just adding another pass over them to re-canonicalize. I have a test case from PR18616 that is great for reproducing this, but pretty useless to check in as it relies on many 10s of nested empty loops that get unrolled and deleted in just the right order. =/ What's worse is that investigating this has exposed another source of failure that is likely to be even harder to test. I'll try to come up with test cases for these fixes, but I want to get the fixes into the tree first as they're causing crashes in the wild. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200273 91177308-0d34-0410-b5e6-96231b3b80d8
* [TLI] Add a new hook to TargetLowering to query the target if a load of a ↵Juergen Ributzka2014-01-28
| | | | | | | | | | | | | | | | | constant should be converted to simply the constant itself. Before this patch we used getIntImmCost from TargetTransformInfo to determine if a load of a constant should be converted to just a constant, but the threshold for this was set to an arbitrary value. This value works well for the two targets (X86 and ARM) that implement this target-hook, but it isn't target-independent at all. Now targets have the possibility to decide directly if this optimization should be performed. The default value is set to false to preserve the current behavior. The target hook has been moved to TargetLowering, which removed the last use and need of TargetTransformInfo in SelectionDAG. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200271 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopVectorize: Support conditional stores by scalarizingArnold Schwaighofer2014-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The vectorizer takes a loop like this and widens all instructions except for the store. The stores are scalarized/unrolled and hidden behind an "if" block. for (i = 0; i < 128; ++i) { if (a[i] < 10) a[i] += val; } for (i = 0; i < 128; i+=2) { v = a[i:i+1]; v0 = (extract v, 0) + 10; v1 = (extract v, 1) + 10; if (v0 < 10) a[i] = v0; if (v1 < 10) a[i] = v1; } The vectorizer relies on subsequent optimizations to sink instructions into the conditional block where they are anticipated. The flag "vectorize-num-stores-pred" controls whether and how many stores to handle this way. Vectorization of conditional stores is disabled per default for now. This patch also adds a change to the heuristic when the flag "enable-loadstore-runtime-unroll" is enabled (off by default). It unrolls small loops until load/store ports are saturated. This heuristic uses TTI's getMaxUnrollFactor as a measure for load/store ports. I also added a second flag -enable-cond-stores-vec. It will enable vectorization of conditional stores. But there is no cost model for vectorization of conditional stores in place yet so this will not do good at the moment. rdar://15892953 Results for x86-64 -O3 -mavx +/- -mllvm -enable-loadstore-runtime-unroll -vectorize-num-stores-pred=1 (before the BFI change): Performance Regressions: Benchmarks/Ptrdist/yacr2/yacr2 7.35% (maze3() is identical but 10% slower) Applications/siod/siod 2.18% Performance improvements: mesa -4.42% libquantum -4.15% With a patch that slightly changes the register heuristics (by subtracting the induction variable on both sides of the register pressure equation, as the induction variable is probably not really unrolled): Performance Regressions: Benchmarks/Ptrdist/yacr2/yacr2 7.73% Applications/siod/siod 1.97% Performance Improvements: libquantum -13.05% (we now also unroll quantum_toffoli) mesa -4.27% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200270 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r199871 and replace it with a simple check in the debug infoEric Christopher2014-01-28
| | | | | | | | | code to see if we're emitting a function into a non-default text section. This is still a less-than-ideal solution, but more contained than r199871 to determine whether or not we're emitting code into an array of comdat sections. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200269 91177308-0d34-0410-b5e6-96231b3b80d8
* Reformat slightly.Eric Christopher2014-01-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200264 91177308-0d34-0410-b5e6-96231b3b80d8
* PGO branch weight: keep halving the weights until they can fit intoManman Ren2014-01-27
| | | | | | | | | | | uint32. When folding branches to common destination, the updated branch weights can exceed uint32 by more than factor of 2. We should keep halving the weights until they can fit into uint32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200262 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the "#ifndef HAVE_SYS_WAIT_H" code path in Program.inc to compileMark Seaborn2014-01-27
| | | | | | Without this fix, WaitResult is not defined. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200259 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM MC: Fix the initial DWARF CFI unwind info at the start of a functionMark Seaborn2014-01-27
| | | | | | | | | | | | | | | | | | | | This brings MC into line with GNU 'as' on ARM, and it brings the ARM target into line with most other LLVM targets, which declare the initial CFI state with addInitialFrameState(). Without this, functions generated with .cfi_startproc/endproc on ARM will tend to cause GDB to abort with: gdb/dwarf2-frame.c:1132: internal-error: Unknown CFA rule. I've also tested this by comparing the output of "readelf -w" on the object files produced by llvm-mc and gas when given the .s file added here. This change is part of addressing PR18636. Differential Revision: http://llvm-reviews.chandlerc.com/D2597 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200255 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix sext(setcc) -> select_cc using wrong type for setcc.Matt Arsenault2014-01-27
| | | | | | | | | | | | | | | | Also update the comment, since it actually produces a select (setcc) instead of select_cc. It was checking and using the setcc result type for the type of the sext, instead of the type of the compared items. In my problem case, the sext was to i32 and was used as the setcc type, but the expected type was i64. No test since I haven't been able to hit the problem with this on any in-tree targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200249 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix unsupported addressing mode assertion for pldDavid Peixotto2014-01-27
| | | | | | | | | | | | | | | | | | | | Summary: This commit gives an address mode to the PLD instruction. We were getting an assertion failure in the frame lowering code because we had code that was doing a pld of a stack allocated address. The frame lowering was checking the address mode and then asserting because pld had none defined. This commit fixes pld for arm mode. There was a previous fix for thumb mode in a separate commit. The commit for thumb mode added a test in a separate file because it would otherwise fail for arm. This commit moves the thumb test back into the prefetch.ll file and adds the corresponding arm test. Differential Revision: http://llvm-reviews.chandlerc.com/D2622 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200248 91177308-0d34-0410-b5e6-96231b3b80d8
* test commit: add minor commentGautam Chakrabarti2014-01-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200244 91177308-0d34-0410-b5e6-96231b3b80d8
* [DAGCombiner] Teach how to fold sext/aext/zext of constant build vectors.Andrea Di Biagio2014-01-27
| | | | | | | | | | | | | | | This patch teaches the DAGCombiner how to fold a sext/aext/zext dag node when the operand in input is a build vector of constants (or UNDEFs). The inability to fold a sext/zext of a constant build_vector was the root cause of some pcg bugs affecting vselect expansion on x86-64 with AVX support. Before this change, the DAGCombiner only knew how to fold a sext/zext/aext of a ConstantSDNode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200234 91177308-0d34-0410-b5e6-96231b3b80d8
* Silence MSVC warning on 'uint16_t |= bool' with a castReid Kleckner2014-01-27
| | | | | | | This isn't C4800, it's C4805. MSVC says this is unsafe, but it generates correct code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200229 91177308-0d34-0410-b5e6-96231b3b80d8
* [CMake] Put *_exports into "Misc" folder.NAKAMURA Takumi2014-01-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200228 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Add support for .cfi_startproc simpleDavid Majnemer2014-01-27
| | | | | | | | | | | | | | This commit allows LLVM MC to process .cfi_startproc directives when they are followed by an additional `simple' identifier. This signals to elide the emission of target specific CFI instructions that would normally occur initially. This fixes PR16587. Differential Revision: http://llvm-reviews.chandlerc.com/D2624 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200227 91177308-0d34-0410-b5e6-96231b3b80d8
* Do not reference llvm-gcc from bugpointTobias Grosser2014-01-27
| | | | | | Reiterating: llvm-gcc is dead since a long time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200220 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorize] Initial version of respecting PGO in the vectorizer: treatChandler Carruth2014-01-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cold loops as-if they were being optimized for size. Nothing fancy here. Simply test case included. The nice thing is that we can now incrementally build on top of this to drive other heuristics. All of the infrastructure work is done to get the profile information into this layer. The remaining work necessary to make this a fully general purpose loop unroller for very hot loops is to make it a fully general purpose loop unroller. Things I know of but am not going to have time to benchmark and fix in the immediate future: 1) Don't disable the entire pass when the target is lacking vector registers. This really doesn't make any sense any more. 2) Teach the unroller at least and the vectorizer potentially to handle non-if-converted loops. This is trivial for the unroller but hard for the vectorizer. 3) Compute the relative hotness of the loop and thread that down to the various places that make cost tradeoffs (very likely only the unroller makes sense here, and then only when dealing with loops that are small enough for unrolling to not completely blow out the LSD). I'm still dubious how useful hotness information will be. So far, my experiments show that if we can get the correct logic for determining when unrolling actually helps performance, the code size impact is completely unimportant and we can unroll in all cases. But at least we'll no longer burn code size on cold code. One somewhat unrelated idea that I've had forever but not had time to implement: mark all functions which are only reachable via the global constructors rigging in the module as optsize. This would also decrease the impact of any more aggressive heuristics here on code size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200219 91177308-0d34-0410-b5e6-96231b3b80d8
* ConstantHoisting: We can't insert instructions directly in front of a PHI node.Benjamin Kramer2014-01-27
| | | | | | Insert before the terminating instruction of the dominating block instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200218 91177308-0d34-0410-b5e6-96231b3b80d8
* XCore: Fix typo in function name.Benjamin Kramer2014-01-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200216 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorizer] Add an override for the target instruction cost and use itChandler Carruth2014-01-27
| | | | | | | to stabilize a test that really is trying to test generic behavior and not a specific target's behavior. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200215 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorizer] Simplify code to use existing helpers on the FunctionChandler Carruth2014-01-27
| | | | | | | | | | object and fewer pointless variables. Also, add a clarifying comment and a FIXME because the code which disables *all* vectorization if we can't use implicit floating point instructions just makes no sense at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200214 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorizer] Teach the loop vectorizer's unroller to only unroll byChandler Carruth2014-01-27
| | | | | | | | | | | | | | | | | | | | | | | | | powers of two. This is essentially always the correct thing given the impact on alignment, scaling factors that can be used in addressing modes, etc. Also, fix the management of the unroll vs. small loop cost to more accurately model things with this world. Enhance a test case to actually exercise more of the unroll machinery if using synthetic constants rather than a specific target model. Before this change, with the added flags this test will unroll 3 times instead of either 2 or 4 (the two sensible answers). While I don't expect this to make a huge difference, if there are lots of loops sitting right on the edge of hitting the 'small unroll' factor, they might change behavior. However, I've benchmarked moving the small loop cost up and down in many various ways and by a huge factor (2x) without seeing more than 0.2% code size growth. Small adjustments such as the series that led up here have led to about 1% improvement on some benchmarks, but it is very close to the noise floor so I mostly checked that nothing regressed. Let me know if you see bad behavior on other targets but I don't expect this to be a sufficiently dramatic change to trigger anything. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200213 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorizer] Add some flags which are useful for conducting experimentsChandler Carruth2014-01-27
| | | | | | | | | | | | with the unrolling behavior in the loop vectorizer. No functionality changed at this point. These are a bit hack-y, but talking with Hal, there doesn't seem to be a cleaner way to easily experiment with different thresholds here and he was also interested in them so I wanted to commit them. Suggestions for improvement are very welcome here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200212 91177308-0d34-0410-b5e6-96231b3b80d8
* [vectorizer] Fix a trivial oversight where we always requested theChandler Carruth2014-01-27
| | | | | | | | | | | | | | number of vector registers rather than toggling between vector and scalar register number based on VF. I don't have a test case as I spotted this by inspection and on X86 it only makes a difference if your target is lacking SSE and thus has *no* vector registers. If someone wants to add a test case for this for ARM or somewhere else where this is more significant, that would be awesome. Also made the variable name a bit more sensible while I'm here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200211 91177308-0d34-0410-b5e6-96231b3b80d8
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