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* Add -disassemble support for -show-inst and -show-encode capability llvm-mc. ↵Richard Barton2012-04-16
| | | | | | | | | Also refactor so all MC paraphernalia are created once for all uses as much as possible. The test change is to account for the fact that the default disassembler behaviour has changed with regards to specifying the assembly syntax to use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154809 91177308-0d34-0410-b5e6-96231b3b80d8
* Tweak the loop rotation logic to check whether the loop is naturallyChandler Carruth2012-04-16
| | | | | | | | | | | laid out in a form with a fallthrough into the header and a fallthrough out of the bottom. In that case, leave the loop alone because any rotation will introduce unnecessary branches. If either side looks like it will require an explicit branch, then the rotation won't add any, do it to ensure the branch occurs outside of the loop (if possible) and maximize the benefit of the fallthrough in the bottom. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154806 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove dead SD nodes after the combining pass. Fixes PR12201.Hal Finkel2012-04-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154786 91177308-0d34-0410-b5e6-96231b3b80d8
* Rewrite how machine block placement handles loop rotation.Chandler Carruth2012-04-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a complex change that resulted from a great deal of experimentation with several different benchmarks. The one which proved the most useful is included as a test case, but I don't know that it captures all of the relevant changes, as I didn't have specific regression tests for each, they were more the result of reasoning about what the old algorithm would possibly do wrong. I'm also failing at the moment to craft more targeted regression tests for these changes, if anyone has ideas, it would be welcome. The first big thing broken with the old algorithm is the idea that we can take a basic block which has a loop-exiting successor and a looping successor and use the looping successor as the layout top in order to get that particular block to be the bottom of the loop after layout. This happens to work in many cases, but not in all. The second big thing broken was that we didn't try to select the exit which fell into the nearest enclosing loop (to which we exit at all). As a consequence, even if the rotation worked perfectly, it would result in one of two bad layouts. Either the bottom of the loop would get fallthrough, skipping across a nearer enclosing loop and thereby making it discontiguous, or it would be forced to take an explicit jump over the nearest enclosing loop to earch its successor. The point of the rotation is to get fallthrough, so we need it to fallthrough to the nearest loop it can. The fix to the first issue is to actually layout the loop from the loop header, and then rotate the loop such that the correct exiting edge can be a fallthrough edge. This is actually much easier than I anticipated because we can handle all the hard parts of finding a viable rotation before we do the layout. We just store that, and then rotate after layout is finished. No inner loops get split across the post-rotation backedge because we check for them when selecting the rotation. That fix exposed a latent problem with our exitting block selection -- we should allow the backedge to point into the middle of some inner-loop chain as there is no real penalty to it, the whole point is that it *won't* be a fallthrough edge. This may have blocked the rotation at all in some cases, I have no idea and no test case as I've never seen it in practice, it was just noticed by inspection. Finally, all of these fixes, and studying the loops they produce, highlighted another problem: in rotating loops like this, we sometimes fail to align the destination of these backwards jumping edges. Fix this by actually walking the backwards edges rather than relying on loopinfo. This fixes regressions on heapsort if block placement is enabled as well as lots of other cases where the previous logic would introduce an abundance of unnecessary branches into the execution. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154783 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove AVX2 vpermq and vpermpd intrinsics. These can now be handled with ↵Craig Topper2012-04-15
| | | | | | normal shuffle vectors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154778 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR12529. The Vxx family of instructions are only supported by AVX.Nadav Rotem2012-04-15
| | | | | | | | Use non-vex instructions for SSE4. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154770 91177308-0d34-0410-b5e6-96231b3b80d8
* When emulating vselect using OR/AND/XOR make sure to bitcast the result back ↵Nadav Rotem2012-04-15
| | | | | | to the original type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154764 91177308-0d34-0410-b5e6-96231b3b80d8
* Added VPERM optimization for AVX2 shufflesElena Demikhovsky2012-04-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154761 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename "fpaccuracy" metadata to the more generic "fpmath". That's because I'mDuncan Sands2012-04-14
| | | | | | | | | | thinking of generalizing it to be able to specify other freedoms beyond accuracy (such as that NaN's don't have to be respected). I'd like the 3.1 release (the first one with this metadata) to have the more generic name already rather than having to auto-upgrade it in 3.2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154744 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix an error in BBVectorize important for vectorizing pointer types.Hal Finkel2012-04-14
| | | | | | | | | | When vectorizing pointer types it is important to realize that potential pairs cannot be connected via the address pointer argument of a load or store. This is because even after vectorization, the address is still a scalar because the address of the higher half of the pair is implicit from the address of the lower half (it need not be, and should not be, explicitly computed). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154735 91177308-0d34-0410-b5e6-96231b3b80d8
* Enhance BBVectorize to more-properly handle pointer values and vectorize GEPs.Hal Finkel2012-04-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154734 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix X86 codegen for 'atomicrmw nand' to generate *x = ~(*x & y), not *x = ↵Richard Smith2012-04-13
| | | | | | ~*x & y. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154705 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support to BBVectorize for vectorizing selects.Hal Finkel2012-04-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154700 91177308-0d34-0410-b5e6-96231b3b80d8
* On Darwin targets, only use vfma etc. if the source use fma() intrinsic ↵Evan Cheng2012-04-13
| | | | | | explicitly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154689 91177308-0d34-0410-b5e6-96231b3b80d8
* Consider ObjC runtime calls objc_storeWeak and others which make a copy ofDan Gohman2012-04-13
| | | | | | | | their argument as "escape" points for objc_retainBlock optimization. This fixes rdar://11229925. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154682 91177308-0d34-0410-b5e6-96231b3b80d8
* Catch the Python exception when subprocess.Popen is failing.Sylvestre Ledru2012-04-13
| | | | | | | | | | For example, if llc cannot be found, the full python stacktrace is displayed and no interesting information are provided. + fail the process when an exception occurs git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154665 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the new Use-aware dominates method to apply the objc runtimeDan Gohman2012-04-13
| | | | | | | | library return value optimization for phi uses. Even when the phi itself is not dominated, the specific use may be dominated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154647 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't move objc_autorelease calls past autorelease pool boundaries whenDan Gohman2012-04-13
| | | | | | | | optimizing autorelease calls on phi nodes with null operands. This fixes rdar://11207070. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154642 91177308-0d34-0410-b5e6-96231b3b80d8
* Disable Hexagon test temporarily.Sirish Pande2012-04-12
| | | | | | | | | | | | | There is an assert at line 558 in ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA). This assert needs to addressed for post RA scheduler. Until that assert is addressed, any passes that uses post ra scheduler will fail. So, I am temporarily disabling the hexagon tests until that fix is in. The assert is as follows: assert(!MI->isTerminator() && !MI->isLabel() && "Cannot schedule terminators or labels!"); git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154617 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch improves the MCJIT runtime dynamic loader by adding new handlingPreston Gurd2012-04-12
| | | | | | | | | | | | of zero-initialized sections, virtual sections and common symbols and preventing the loading of sections which are not required for execution such as debug information. Patch by Andy Kaylor! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154610 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix 128-bit ptest intrinsics to take v2i64 instead of v4f32 since these are ↵Craig Topper2012-04-12
| | | | | | integer instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154580 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert changes that were accidentally committed.Akira Hatanaka2012-04-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154563 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix string that is being checked.Akira Hatanaka2012-04-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154547 91177308-0d34-0410-b5e6-96231b3b80d8
* Emit neg.s or neg.d only if -enable-no-nans-fp-math is supplied by user,Akira Hatanaka2012-04-11
| | | | | | | | otherwise expand FNEG during legalization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154546 91177308-0d34-0410-b5e6-96231b3b80d8
* Emit abs.s or abs.d only if -enable-no-nans-fp-math is supplied by user.Akira Hatanaka2012-04-11
| | | | | | | | Invalid operation is signaled if the operand of these instructions is NaN. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154545 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed a case of ARM disassembly getting an assert on a bad encodingKevin Enderby2012-04-11
| | | | | | | of a VST instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154544 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix bugs in lowering of FCOPYSIGN nodes.Akira Hatanaka2012-04-11
| | | | | | | | | | | | - FCOPYSIGN nodes that have operands of different types were not handled. - Different code was generated depending on the endianness of the target. Additionally, code is added that emits INS and EXT instructions, if they are supported by target (they are R2 instructions). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154540 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM 'vuzp.32 Dd, Dm' is a pseudo-instruction.Jim Grosbach2012-04-11
| | | | | | | | | | While there is an encoding for it in VUZP, the result of that is undefined, so we should avoid it. Define the instruction as a pseudo for VTRN.32 instead, as the ARM ARM indicates. rdar://11222366 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154511 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM 'vzip.32 Dd, Dm' is a pseudo-instruction.Jim Grosbach2012-04-11
| | | | | | | | | | While there is an encoding for it in VZIP, the result of that is undefined, so we should avoid it. Define the instruction as a pseudo for VTRN.32 instead, as the ARM ARM indicates. rdar://11221911 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154505 91177308-0d34-0410-b5e6-96231b3b80d8
* Add more fused mul+add/sub patterns. rdar://10139676Evan Cheng2012-04-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154484 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply 154396 after fixing a test.Nadav Rotem2012-04-11
| | | | | | | | | | | Original message: Modify the code that lowers shuffles to blends from using blendvXX to vblendXX. blendV uses a register for the selection while Vblend uses an immediate. On sandybridge they still have the same latency and execute on the same execution ports. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154483 91177308-0d34-0410-b5e6-96231b3b80d8
* Clean up ARM fused multiply + add/sub support some more: rename some iselEvan Cheng2012-04-11
| | | | | | | | | | | | predicates. Also remove NEON2 since it's not really useful and it is confusing. If NEON + VFP4 implies NEON2 but NEON2 doesn't imply NEON + VFP4, what does it really mean? rdar://10139676 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154480 91177308-0d34-0410-b5e6-96231b3b80d8
* Match (fneg (fma) to vfnma. rdar://10139676Evan Cheng2012-04-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154469 91177308-0d34-0410-b5e6-96231b3b80d8
* Add retw and lretw instructions. Also, fix Intel syntax parsing for allCharles Davis2012-04-11
| | | | | | | ret instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154468 91177308-0d34-0410-b5e6-96231b3b80d8
* Merge fma.ll into fusedMAC.llEvan Cheng2012-04-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154466 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix ARM disassembly of VLD instructions with writebacks.  And add test a caseKevin Enderby2012-04-11
| | | | | | | for all opcodes handed by DecodeVLDInstruction() in ARMDisassembler.cpp . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154459 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM add missing Thumb1 two-operand aliases for shift-by-immediate.Jim Grosbach2012-04-11
| | | | | | rdar://11222742 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154457 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a number of problems with ARM fused multiply add/subtract instructions.Evan Cheng2012-04-11
| | | | | | | | | | | 1. The new instruction itinerary entries are not properly described. 2. The asm parser can't handle vfms and vfnms. 3. There were no assembler, disassembler test cases. 4. HasNEON2 has the wrong assembler predicate. rdar://10139676 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154456 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix test to be register assignment invariant.Jakob Stoklund Olesen2012-04-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154453 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the constant-folding support for FP_ROUND in SelectionDAG from the ↵Owen Anderson2012-04-10
| | | | | | | | | one-operand version of getNode() to the two-operand version, since it became a two-operand node at sound point. Zap a testcase that this allows us to completely fold away. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154447 91177308-0d34-0410-b5e6-96231b3b80d8
* [tsan] two more compile-time optimizations:Kostya Serebryany2012-04-10
| | | | | | | | | | | | | | | | - don't isntrument reads from constant globals. Saves ~1.5% of instrumented instructions on CPU2006 (counting static instructions, not their execution). - don't insrument reads from vtable (which is a global constant too). Saves ~5%. I did not measure the run-time impact of this, but it is certainly non-negative. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154444 91177308-0d34-0410-b5e6-96231b3b80d8
* Handle llvm.fma.* intrinsics. rdar://10914096Evan Cheng2012-04-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154439 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a comment noting that the fdiv -> fmul conversion won't generateDuncan Sands2012-04-10
| | | | | | | multiplication by a denormal, and some tests checking that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154431 91177308-0d34-0410-b5e6-96231b3b80d8
* Temporarily revert this patch to see if it brings the buildbots back.Eric Christopher2012-04-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154425 91177308-0d34-0410-b5e6-96231b3b80d8
* [tsan] compile-time instrumentation: do not instrument a read ifKostya Serebryany2012-04-10
| | | | | | | | | | | | | | | a write to the same temp follows in the same BB. Also add stats printing. On Spec CPU2006 this optimization saves roughly 4% of instrumented reads (which is 3% of all instrumented accesses): Writes : 161216 Reads : 446458 Reads-before-write: 18295 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154418 91177308-0d34-0410-b5e6-96231b3b80d8
* To ensure that we have more accurate line information for a blockEric Christopher2012-04-10
| | | | | | | | | don't elide the branch instruction if it's the only one in the block, otherwise it's ok. PR9796 and rdar://11215207 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154417 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM fix cc_out operand handling for t2SUBrr instructions.Jim Grosbach2012-04-10
| | | | | | | | | | | | We were incorrectly conflating some add variants which don't have a cc_out operand with the mirroring sub encodings, which do. Part of the awesome non-orthogonality legacy of thumb1. Similarly, handling of add/sub of an immediate was sometimes incorrectly removing the cc_out operand for add/sub register variants. rdar://11216577 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154411 91177308-0d34-0410-b5e6-96231b3b80d8
* Modify the code that lowers shuffles to blends from using blendvXX to vblendXX.Nadav Rotem2012-04-10
| | | | | | | | | blendv uses a register for the selection while vblend uses an immediate. On sandybridge they still have the same latency and execute on the same execution ports. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154396 91177308-0d34-0410-b5e6-96231b3b80d8
* Transform div to mul with reciprocal only when fp imm is legal.Anton Korobeynikov2012-04-10
| | | | | | | This fixes PR12516 and uncovers one weird problem in legalize (workarounded) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154394 91177308-0d34-0410-b5e6-96231b3b80d8
* Express the number of ULPs in fpaccuracy metadata as a real rather than aDuncan Sands2012-04-10
| | | | | | | rational number, eg as 2.5 rather than 5, 2. OK'd by Peter Collingbourne. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154387 91177308-0d34-0410-b5e6-96231b3b80d8
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