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* Fix integer undefined behavior due to signed left shift overflow in LLVM.Richard Smith2012-08-24
| | | | | | | Reviewed offline by chandlerc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162623 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid including explicit uses when counting SDNode imp-uses.Jakob Stoklund Olesen2012-08-24
| | | | | | | It is legal to have a register node as an explicit operand, it shouldn't be counted as an implicit use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162591 91177308-0d34-0410-b5e6-96231b3b80d8
* BranchProb: modify the definition of an edge in BranchProbabilityInfo to handleManman Ren2012-08-24
| | | | | | | | | | | | | | | | the case of multiple edges from one block to another. A simple example is a switch statement with multiple values to the same destination. The definition of an edge is modified from a pair of blocks to a pair of PredBlock and an index into the successors. Also set the weight correctly when building SelectionDAG from LLVM IR, especially when converting a Switch. IntegersSubsetMapping is updated to calculate the weight for each cluster. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162572 91177308-0d34-0410-b5e6-96231b3b80d8
* Use DW_FORM_flag_present to save space in debug information if we'reEric Christopher2012-08-24
| | | | | | | | not in darwin gdb compat mode. Fixes rdar://10975088 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162526 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the DW_AT_MIPS_linkage name attribute when we don't need itEric Christopher2012-08-23
| | | | | | | | | | | output (we're emitting a specification already and the information isn't changing) and we're not in old gdb compat mode. Saves 1% on the debug information for a build of llvm. Fixes rdar://11043421 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162493 91177308-0d34-0410-b5e6-96231b3b80d8
* Turn these two options in to trinary state so that they can beEric Christopher2012-08-23
| | | | | | turned on and off separate from the platform if you're on darwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162487 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a flag to DwarfDebug to allow it to communicate whether or notEric Christopher2012-08-23
| | | | | | we're using the darwin old gdb compat mode for emitting dwarf. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162486 91177308-0d34-0410-b5e6-96231b3b80d8
* Typo.Eric Christopher2012-08-23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162438 91177308-0d34-0410-b5e6-96231b3b80d8
* Only emit the __debug_inlined section if we're trying to be compatibleEric Christopher2012-08-23
| | | | | | | | with older gdbs on darwin. rdar://10975874 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162436 91177308-0d34-0410-b5e6-96231b3b80d8
* Emit pubtypes only when going for darwin gdb compatibility.Eric Christopher2012-08-23
| | | | | | rdar://10393214 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162434 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an option for darwin gdb compatibility.Eric Christopher2012-08-23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162432 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify the computeOperandLatency API.Andrew Trick2012-08-23
| | | | | | | | | The logic for recomputing latency based on a ScheduleDAG edge was shady. This bypasses the problem by requiring the client to provide operand indices. This ensures consistent use of the machine model's API. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162420 91177308-0d34-0410-b5e6-96231b3b80d8
* Tidy up a few more uses of MF.getFunction()->getName().David Blaikie2012-08-22
| | | | | | | | Based on CR feedback from r162301 and Craig Topper's refactoring in r162347 here are a few other places that could use the same API (& in one instance drop a Function.h dependency). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162367 91177308-0d34-0410-b5e6-96231b3b80d8
* Reduce duplicated hash map lookups.Benjamin Kramer2012-08-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162362 91177308-0d34-0410-b5e6-96231b3b80d8
* Rejected 169195. As Duncan commented, bitcasting to proper type is wrong ↵Stepan Dyatkovskiy2012-08-22
| | | | | | approach. We need to insert some valid TRANCATE node here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162354 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a getName function to MachineFunction. Use it in places that previously ↵Craig Topper2012-08-22
| | | | | | did getFunction()->getName(). Remove includes of Function.h that are no longer needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162347 91177308-0d34-0410-b5e6-96231b3b80d8
* Initialize SelectionDAGBuilder's Context in 'init', not in its constructor. TheRichard Smith2012-08-22
| | | | | | | | | SelectionDAG's 'init' has not been called when the SelectionDAGBuilder is constructed (in SelectionDAGISel's constructor), so this was previously always initialized with 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162333 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unnecessary cast that was also unnecessarily casting away constness.David Blaikie2012-08-21
| | | | | | | | | | Even looking at the revision history I couldn't quite piece together why this cast was ever written in the first place, but I assume it was because of some change in the inheritance, perhaps this function was reimplemented in a derived type & this caller was meant to get the base version (& it wasn't virtual)? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162301 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for the --param ssp-buffer-size= driver option.Chad Rosier2012-08-21
| | | | | | PR9673 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162284 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a quadratic algorithm in MachineBranchProbabilityInfo.Jakob Stoklund Olesen2012-08-20
| | | | | | | | | | | | The getSumForBlock function was quadratic in the number of successors because getSuccWeight would perform a linear search for an already known iterator. This patch was originally committed as r161460, but reverted again because of assertion failures. Now that duplicate Machine CFG edges have been eliminated, this works properly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162233 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't add CFG edges for redundant conditional branches.Jakob Stoklund Olesen2012-08-20
| | | | | | | | | | | | | IR that hasn't been through SimplifyCFG can look like this: br i1 %b, label %r, label %r Make sure we don't create duplicate Machine CFG edges in this case. Fix the machine code verifier to accept conditional branches with a single CFG edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162230 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a verification pass after ExpandISelPseudos.Jakob Stoklund Olesen2012-08-20
| | | | | | | This pass often has weird CFG hacks and hand-written MI building code that can go wrong in many ways. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162224 91177308-0d34-0410-b5e6-96231b3b80d8
* Add CFG checks to MachineVerifier.Jakob Stoklund Olesen2012-08-20
| | | | | | | Verify that the predecessor and successor lists are consistent and free of duplicates. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162223 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed DAGCombiner bug (found and localized by James Malloy):Stepan Dyatkovskiy2012-08-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The DAGCombiner tries to optimise a BUILD_VECTOR by checking if it consists purely of get_vector_elts from one or two source vectors. If so, it either makes a concat_vectors node or a shufflevector node. However, it doesn't check the element type width of the underlying vector, so if you have this sequence: Node0: v4i16 = ... Node1: i32 = extract_vector_elt Node0 Node2: i32 = extract_vector_elt Node0 Node3: v16i8 = BUILD_VECTOR Node1, Node2, ... It will attempt to: Node0: v4i16 = ... NewNode1: v16i8 = concat_vectors Node0, ... Where this is actually invalid because the element width is completely different. This causes an assertion failure on DAG legalization stage. Fix: If output item type of BUILD_VECTOR differs from input item type. Make concat_vectors based on input element type and then bitcast it to the output vector type. So the case described above will transformed to: Node0: v4i16 = ... NewNode1: v8i16 = concat_vectors Node0, ... NewNode2: v16i8 = bitcast NewNode1 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162195 91177308-0d34-0410-b5e6-96231b3b80d8
* Make atomic load and store of pointers work. Tighten verification of atomic ↵Eli Friedman2012-08-17
| | | | | | | | | | | operations so other unexpected operations don't slip through. Based on patch by Logan Chien. PR11786/PR13186. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162146 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement stack protectors for structures with character arrays in them.Bill Wendling2012-08-17
| | | | | | | <rdar://problem/10545247> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162131 91177308-0d34-0410-b5e6-96231b3b80d8
* Change the `linker_private_weak_def_auto' linkage to `linkonce_odr_auto_hide' toBill Wendling2012-08-17
| | | | | | | | | | | | | | | | | | | | | make it more consistent with its intended semantics. The `linker_private_weak_def_auto' linkage type was meant to automatically hide globals which never had their addresses taken. It has nothing to do with the `linker_private' linkage type, which outputs the symbols with a `l' (ell) prefix among other things. The intended semantic is more like the `linkonce_odr' linkage type. Change the name of the linkage type to `linkonce_odr_auto_hide'. And therefore changing the semantics so that it produces the correct output for the linker. Note: The old linkage name `linker_private_weak_def_auto' will still parse but is not a synonym for `linkonce_odr_auto_hide'. This should be removed in 4.0. <rdar://problem/11754934> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162114 91177308-0d34-0410-b5e6-96231b3b80d8
* TargetLowering: Use the large shift amount during legalize types. The ↵Benjamin Kramer2012-08-17
| | | | | | legalizer may call us with an overly large type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162101 91177308-0d34-0410-b5e6-96231b3b80d8
* Use standard pattern for iterate+erase.Jakob Stoklund Olesen2012-08-17
| | | | | | | | | Increment the MBB iterator at the top of the loop to properly handle the current (and previous) instructions getting erased. This fixes PR13625. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162099 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an MCID::Select flag and TII hooks for optimizing selects.Jakob Stoklund Olesen2012-08-16
| | | | | | | | | | | | Select instructions pick one of two virtual registers based on a condition, like x86 cmov. On targets like ARM that support predication, selects can sometimes be eliminated by predicating the instruction defining one of the operands. Teach PeepholeOptimizer to recognize select instructions, and ask the target to optimize them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162059 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix undefined behavior: don't perform array indexing through a potentially nullRichard Smith2012-08-15
| | | | | | | pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161919 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix undefined behavior: binding null pointer to reference. No functionality ↵Richard Smith2012-08-14
| | | | | | change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161853 91177308-0d34-0410-b5e6-96231b3b80d8
* Grammar.Eric Christopher2012-08-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161851 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a roundToIntegral method to APFloat, which can be parameterized over ↵Owen Anderson2012-08-13
| | | | | | various rounding modes. Use this to implement SelectionDAG constant folding of FFLOOR, FCEIL, and FTRUNC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161807 91177308-0d34-0410-b5e6-96231b3b80d8
* Transfer weights in transferSuccessorsAndUpdatePHIs().Jakob Stoklund Olesen2012-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161805 91177308-0d34-0410-b5e6-96231b3b80d8
* Print out MachineBasicBlock successor weights when available.Jakob Stoklund Olesen2012-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161804 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the TII::scheduleTwoAddrSource() hook.Jakob Stoklund Olesen2012-08-13
| | | | | | | | | | | | | | | It never does anything when running 'make check', and it get's in the way of updating live intervals in 2-addr. The hook was originally added to help form IT blocks in Thumb2 code before register allocation, but the pass ordering has changed since then, and we run if-conversion after register allocation now. When the MI scheduler is enabled, there will be no less than two schedulers between 2-addr and Thumb2ITBlockPass, so this hook is unlikely to help anything. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161794 91177308-0d34-0410-b5e6-96231b3b80d8
* Whitespace cleanup.Bill Wendling2012-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161788 91177308-0d34-0410-b5e6-96231b3b80d8
* Count triangles and diamonds in early if-conversion.Jakob Stoklund Olesen2012-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161783 91177308-0d34-0410-b5e6-96231b3b80d8
* Delete dead typedef.Jakob Stoklund Olesen2012-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161782 91177308-0d34-0410-b5e6-96231b3b80d8
* Handle extra Tail predecessors in if-conversion.Jakob Stoklund Olesen2012-08-13
| | | | | | | | It is still possible to if-convert if the tail block has extra predecessors, but the tail phis must be rewritten instead of being removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161781 91177308-0d34-0410-b5e6-96231b3b80d8
* MachineCSE: Hoist isConstantPhysReg out of the loop, it checks for overlaps ↵Benjamin Kramer2012-08-11
| | | | | | already. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161729 91177308-0d34-0410-b5e6-96231b3b80d8
* PR13578: Teach MachineCSE that instructions that use a constant register can ↵Benjamin Kramer2012-08-11
| | | | | | | | be CSE'd safely. This is common e.g. when doing rip-relative addressing on x86_64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161728 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a proper if-conversion cost model.Jakob Stoklund Olesen2012-08-10
| | | | | | | | | | | | | | Detect when there is not enough available ILP, so if-conversion can't speculate instructions for free. Compute the lengthening of the critical path when inserting a select instruction that depends on the condition as well as both sides of the if. Reject conversions that would stretch the critical path by more than half a mispredict penalty. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161713 91177308-0d34-0410-b5e6-96231b3b80d8
* Give MachineTraceMetrics its own debug tag.Jakob Stoklund Olesen2012-08-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161712 91177308-0d34-0410-b5e6-96231b3b80d8
* Add more trace query functions.Jakob Stoklund Olesen2012-08-10
| | | | | | | | | | | Trace::getResourceLength() computes the number of cycles required to execute the trace when ignoring data dependencies. The number can be compared to the critical path to estimate the trace ILP. Trace::getPHIDepth() computes the data dependency depth of a PHI in a trace successor that isn't necessarily part of the trace. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161711 91177308-0d34-0410-b5e6-96231b3b80d8
* Add getTPred() and getFPred() functions.Jakob Stoklund Olesen2012-08-10
| | | | | | They identify the PHI predecessors in both diamonds and triangles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161689 91177308-0d34-0410-b5e6-96231b3b80d8
* Include loop-carried dependencies when computing instr heights.Jakob Stoklund Olesen2012-08-10
| | | | | | | | | When a trace ends with a back-edge, include PHIs in the loop header in the height computations. This makes the critical path through a loop more accurate by including the latencies of the last instructions in the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161688 91177308-0d34-0410-b5e6-96231b3b80d8
* Update edge weights correctly in replaceSuccessor().Jakob Stoklund Olesen2012-08-10
| | | | | | | | When replacing Old with New, it can happen that New is already a successor. Add the old and new edge weights instead of creating a duplicate edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161653 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r161633-161634 "Partition use lists so defs always come before uses.""Jakob Stoklund Olesen2012-08-10
| | | | | | | No changes to these patches, MRI needed to be notified when changing uses into defs and vice versa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161644 91177308-0d34-0410-b5e6-96231b3b80d8
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