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* Double the amount of memory reserved for SUnits. This is aDan Gohman2008-12-171-1/+3
| | | | | | | | | temporary workaround for an obscure bug. When node cloning is used, it is possible that more SUnits will be created, and if the SUnits std::vector has to reallocate, it will invalidate all the graph edges. llvm-svn: 61122
* Use getDepth() and getHeight() instead of accessing theDan Gohman2008-12-171-2/+2
| | | | | | | Depth and Height members directly, as they may not be current. llvm-svn: 61121
* Fix for PR3225: disable a broken optimization inEli Friedman2008-12-171-0/+3
| | | | | | | | | DAGTypeLegalizer::ExpandShiftWithKnownAmountBit. In terms of restoring the optimization, the best fix here isn't obvious... any ideas? llvm-svn: 61119
* A new dag combine; several permutations of thisDale Johannesen2008-12-161-0/+6
| | | | | | are there under ADD, this one was missing. llvm-svn: 61107
* Add code to renumber split intervals into new vregs. This is disabled for ↵Owen Anderson2008-12-161-0/+48
| | | | | | now until I finish working out some iterator invalidation issues. llvm-svn: 61104
* Eliminate the loop that walks the critical path. Instead, just track theDan Gohman2008-12-161-54/+64
| | | | | | | position in the critical path during the main instruction walk. This eliminates the need for the CritialAntiDep DenseMap. llvm-svn: 61096
* Preserve SourceValue information when lowering produces multiple loads fromDan Gohman2008-12-161-3/+6
| | | | | | different offsets within the same stack slot. llvm-svn: 61093
* We have decided not to support inline asm where an output operand with a ↵Evan Cheng2008-12-161-11/+12
| | | | | | matching input operand with incompatible type (i.e. either one is a floating point and the other is an integer or the sizes of the types differ). SelectionDAGBuild will catch these and exit with an error. llvm-svn: 61092
* Enable anti-dependence breaking by default when post-RA scheduling is enabled.Dan Gohman2008-12-161-1/+1
| | | | llvm-svn: 61078
* When breaking an anti-dependency, don't use a register which has seenDan Gohman2008-12-161-0/+1
| | | | | | | one of its aliases defined. This is conservative, but tricky subreg corner cases are outside the primary aim of this pass. llvm-svn: 61077
* Add initial support for back-scheduling address computations,Dan Gohman2008-12-162-1/+140
| | | | | | | especially in the case of addresses computed from loop induction variables. llvm-svn: 61075
* Remove some special-case logic in ScheduleDAGSDNodes's Dan Gohman2008-12-161-10/+0
| | | | | | | latency computation code that is no longer needed with the new method for handling latencies. llvm-svn: 61074
* Fix some register-alias-related bugs in the post-RA scheduler livenessDan Gohman2008-12-168-267/+287
| | | | | | | | | | | | | | computation code. Also, avoid adding output-depenency edges when both defs are dead, which frequently happens with EFLAGS defs. Compute Depth and Height lazily, and always in terms of edge latency values. For the schedulers that don't care about latency, edge latencies are set to 1. Eliminate Cycle and CycleBound, and LatencyPriorityQueue's Latencies array. These are all subsumed by the Depth and Height fields. llvm-svn: 61073
* Add a simple target-independent heuristic to allow targets with noDan Gohman2008-12-161-0/+6
| | | | | | instruction itinerary data to back-schedule loads. llvm-svn: 61070
* Move addPred and removePred out-of-line.Dan Gohman2008-12-161-0/+61
| | | | llvm-svn: 61067
* Make addPred and removePred return void, since the return value is notDan Gohman2008-12-162-8/+8
| | | | | | currently used by anything. llvm-svn: 61066
* This getEdgeAttributes doesn't need a template argument.Dan Gohman2008-12-161-2/+2
| | | | llvm-svn: 61065
* Added support for splitting and scalarizing vector shifts.Mon P Wang2008-12-152-0/+19
| | | | llvm-svn: 61050
* Fix printing of PseudoSourceValues in SDNode graphs.Dan Gohman2008-12-151-5/+3
| | | | llvm-svn: 61036
* Added support to LegalizeType for expanding the operands of scalar to vectorMon P Wang2008-12-153-9/+57
| | | | | | | and insert vector element. Modified extract vector element to extend the result to match the expected promoted type. llvm-svn: 61029
* Reapply r60997, this time without forgetting thatDuncan Sands2008-12-142-7/+14
| | | | | | | target constants are allowed to have an illegal type. llvm-svn: 61006
* Temporarily revert r60997. It was causing this failure:Bill Wendling2008-12-132-10/+7
| | | | | | | | | | | | | | | | | | | Running /Users/void/llvm/llvm.src/test/CodeGen/Generic/dg.exp ... FAIL: /Users/void/llvm/llvm.src/test/CodeGen/Generic/asm-large-immediate.ll Failed with exit(1) at line 1 while running: llvm-as < /Users/void/llvm/llvm.src/test/CodeGen/Generic/asm-large-immediate.ll | llc | /usr/bin/grep 68719476738 Assertion failed: ((TypesNeedLegalizing || getTypeAction(VT) == Legal) && "Illegal type introduced after type legalization?"), function HandleOp, file /Users/void/llvm/llvm.src/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp, line 493. 0 llc 0x0085392e char const* std::find<char const*, char>(char const*, char const*, char const&) + 98 1 llc 0x00853e63 llvm::sys::PrintStackTraceOnErrorSignal() + 593 2 libSystem.B.dylib 0x96cac09b _sigtramp + 43 3 libSystem.B.dylib 0xffffffff _sigtramp + 1765097359 4 libSystem.B.dylib 0x96d24ec2 raise + 26 5 libSystem.B.dylib 0x96d3447f abort + 73 6 libSystem.B.dylib 0x96d26063 __assert_rtn + 101 7 llc 0x004f9018 llvm::cast_retty<llvm::SubprogramDesc, llvm::DebugInfoDesc*>::ret_type llvm::cast<llvm::Sub ... llvm-svn: 61001
* LegalizeDAG is not supposed to introduce illegalDuncan Sands2008-12-132-7/+10
| | | | | | | types into the DAG if they were not already there. Check this with an assertion. llvm-svn: 60997
* Remove assertion to allow promotion of a truncating store operandMon P Wang2008-12-131-2/+0
| | | | llvm-svn: 60975
* Added basic support for expanding VSETCCMon P Wang2008-12-131-2/+21
| | | | llvm-svn: 60974
* On big-endian machines it is wrong to do a fullDuncan Sands2008-12-131-19/+22
| | | | | | | | | | width register load followed by a truncating store for the copy, since the load will not place the value in the lower bits. Probably partial loads/stores can never happen here, but fix it anyway. llvm-svn: 60972
* Do not print empty DW_AT_comp_dir.Devang Patel2008-12-121-1/+2
| | | | llvm-svn: 60965
* When expanding unaligned loads and stores do not makeDuncan Sands2008-12-121-34/+123
| | | | | | | | | | | | | | | | | | | | | | | | use of illegal integer types: instead, use a stack slot and copying via integer registers. The existing code is still used if the bitconvert is to a legal integer type. This fires on the PPC testcases 2007-09-08-unaligned.ll and vec_misaligned.ll. It looks like equivalent code is generated with these changes, just permuted, but it's hard to tell. With these changes, nothing in LegalizeDAG produces illegal integer types anymore. This is a prerequisite for removing the LegalizeDAG type legalization code. While there I noticed that the existing code doesn't handle trunc store of f64 to f32: it turns this into an i64 store, which represents a 4 byte stack smash. I added a FIXME about this. Hopefully someone more motivated than I am will take care of it. llvm-svn: 60964
* Fix add/sub expansion: don't create ADD / SUB with two results (seems like ↵Evan Cheng2008-12-121-5/+5
| | | | | | everyone is doing this these days :-). Patch by Daniel M Gessel! llvm-svn: 60958
* When using a 4 byte jump table on a 64 bit machine,Duncan Sands2008-12-121-11/+3
| | | | | | | | do an extending load of the 4 bytes rather than a potentially illegal (type) i32 load followed by a sign extend. llvm-svn: 60945
* Added support for SELECT v8i8 v4i16 for X86 (MMX)Mon P Wang2008-12-121-0/+4
| | | | | | Added support for TRUNC v8i16 to v8i8 for X86 (MMX) llvm-svn: 60916
* Redo the arithmetic with overflow architecture. I was changing the semantics ofBill Wendling2008-12-121-15/+0
| | | | | | | | | | | | ISD::ADD to emit an implicit EFLAGS. This was horribly broken. Instead, replace the intrinsic with an ISD::SADDO node. Then custom lower that into an X86ISD::ADD node with a associated SETCC that checks the correct condition code (overflow or carry). Then that gets lowered into the correct X86::ADDOvf instruction. Similar for SUB and MUL instructions. llvm-svn: 60915
* Avoid generating a convert_rndsat node when the src and dest type are the same.Mon P Wang2008-12-111-0/+4
| | | | llvm-svn: 60869
* Clarify FIXME.Bill Wendling2008-12-111-6/+6
| | | | llvm-svn: 60867
* Whitespace clean up (tabs with spaces)Mon P Wang2008-12-111-8/+8
| | | | llvm-svn: 60866
* Make fix for r60829 less conservative to allow the proper optimization forMon P Wang2008-12-111-2/+9
| | | | | | vec_extract-sse4.ll. llvm-svn: 60865
* Add a newline after this debug output.Bill Wendling2008-12-101-1/+1
| | | | llvm-svn: 60861
* If ADD, SUB, or MUL have an overflow bit that's used, don't do transformation onBill Wendling2008-12-101-0/+15
| | | | | | | them. The DAG combiner expects that nodes that are transformed have one value result. llvm-svn: 60857
* For amusement, implement SADDO, SSUBO, UADDO, USUBODuncan Sands2008-12-102-19/+80
| | | | | | | | | for promoted integer types, eg: i16 on ppc-32, or i24 on any platform. Complete support for arbitrary precision integers would require handling expanded integer types, eg: i128, but I couldn't be bothered. llvm-svn: 60834
* Fixed a bug when trying to optimize a extract vector element of aMon P Wang2008-12-101-1/+2
| | | | | | bit convert that changes the number of elements of a shuffle. llvm-svn: 60829
* Fix MachineCodeEmitter to use uintptr_t instead of intptr_t. This avoids ↵Evan Cheng2008-12-102-11/+11
| | | | | | some overflow issues. Patch by Thomas Jablin. llvm-svn: 60828
* Whitespace changes.Bill Wendling2008-12-101-1/+1
| | | | llvm-svn: 60826
* Whitespace fixes.Bill Wendling2008-12-101-14/+12
| | | | llvm-svn: 60818
* Update CalcLatency to work in terms of edge latencies, rather thanDan Gohman2008-12-101-26/+5
| | | | | | | | node latencies. Use CalcLatency instead of manual code in CalculatePriorities to keep it consistent. Previously it computed slightly different results. llvm-svn: 60817
* Fix a couple of Dwarf bugs.Evan Cheng2008-12-102-8/+22
| | | | | | | - Emit DW_AT_byte_size for struct and union of size zero. - Emit DW_AT_declaration for forward type declaration. llvm-svn: 60812
* Rewrite the SDep class, and simplify some of the related code.Dan Gohman2008-12-099-303/+318
| | | | | | | | | | | | | | | | | The Cost field is removed. It was only being used in a very limited way, to indicate when the scheduler should attempt to protect a live register, and it isn't really needed to do that. If we ever want the scheduler to start inserting copies in non-prohibitive situations, we'll have to rethink some things anyway. A Latency field is added. Instead of giving each node a single fixed latency, each edge can have its own latency. This will eventually be used to model various micro-architecture properties more accurately. The PointerIntPair class and an internal union are now used, which reduce the overall size. llvm-svn: 60806
* Minor code simplification.Dan Gohman2008-12-091-3/+3
| | | | llvm-svn: 60804
* Add sub/mul overflow intrinsics. This currently doesn't have aBill Wendling2008-12-096-25/+87
| | | | | | | target-independent way of determining overflow on multiplication. It's very tricky. Patch by Zoltan Varga! llvm-svn: 60800
* Fix PR3117: not all nodes being legalized. TheDuncan Sands2008-12-097-207/+467
| | | | | | | | | | | | | | | | | | | | | | | essential problem was that the DAG can contain random unused nodes which were never analyzed. When remapping a value of a node being processed, such a node may become used and need to be analyzed; however due to operands being transformed during analysis the node may morph into a different one. Users of the morphing node need to be updated, and this wasn't happening. While there I added a bunch of documentation and sanity checks, so I (or some other poor soul) won't have to scratch their head over this stuff so long trying to remember how it was all supposed to work next time some obscure problem pops up! The extra sanity checking exposed a few places where invariants weren't being preserved, so those are fixed too. Since some of the sanity checking is expensive, I added a flag to turn it on. It is also turned on when building with ENABLE_EXPENSIVE_CHECKS=1. llvm-svn: 60797
* Cosmetic changes.Evan Cheng2008-12-091-6/+8
| | | | llvm-svn: 60771
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