Commit Graph

71 Commits

Author SHA1 Message Date
Dan Gohman
dd5b58ad7b FastISel support for exception-handling constructs.
- Move the EH landing-pad code and adjust it so that it works
   with FastISel as well as with SDISel.
 - Add FastISel support for @llvm.eh.exception and
   @llvm.eh.selector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57539 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-14 23:54:11 +00:00
Dan Gohman
f06c835f76 Optimize SelectionDAG's AssignTopologicalOrder even further.
Completely eliminate the TopOrder std::vector. Instead, sort
the AllNodes list in place. This also eliminates the need to
call AllNodes.size(), a linear-time operation, before
performing the sort.

Also, eliminate the Sources temporary std::vector, since it
essentially duplicates the sorted result as it is being
built.

This also changes the direction of the topological sort
from bottom-up to top-down. The AllNodes list starts out in
roughly top-down order, so this reduces the amount of
reordering needed. Top-down is also more convenient for
Legalize, and ISel needed only minor adjustments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56867 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-30 18:30:35 +00:00
Dan Gohman
d57dd5f4e6 Arrange for FastISel code to have access to the MachineModuleInfo
object. This will be needed to support debug info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56508 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23 21:53:34 +00:00
Dan Gohman
3df24e667f Create HandlePHINodesInSuccessorBlocksFast, a version of
HandlePHINodesInSuccessorBlocks that works FastISel-style. This
allows PHI nodes to be updated correctly while using FastISel.

This also involves some code reorganization; ValueMap and
MBBMap are now members of the FastISel class, so they needn't
be passed around explicitly anymore. Also, SelectInstructions
is changed to SelectInstruction, and only does one instruction
at a time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55746 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-03 23:12:08 +00:00
Dan Gohman
5edd361497 Fix a FastISel bug where the instructions from lowering the arguments
were being emitted after the first instructions of the entry block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55496 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-28 20:28:56 +00:00
Dan Gohman
7c3234c6be Reorganize the lifetimes of the major objects SelectionDAGISel
works with.

SelectionDAG, FunctionLoweringInfo, and SelectionDAGLowering
objects now get created once per SelectionDAGISel instance, and
can be reused across blocks and across functions. Previously,
they were created and destroyed each time they were needed.

This reorganization simplifies the handling of PHI nodes, and
also SwitchCases, JumpTables, and BitTestBlocks. This
simplification has the side effect of fixing a bug in FastISel
where successor PHI nodes weren't being updated correctly.

This is also a step towards making the transition from FastISel
into and out of SelectionDAG faster, and also making
plain SelectionDAG faster on code with lots of little blocks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55450 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-27 23:52:12 +00:00
Dan Gohman
f350b277f3 Move the point at which FastISel taps into the SelectionDAGISel
process up to a higher level. This allows FastISel to leverage
more of SelectionDAGISel's infastructure, such as updating Machine
PHI nodes.

Also, implement transitioning from SDISel back to FastISel in
the middle of a block, so it's now possible to go back and
forth. This allows FastISel to hand individual CallInsts and other
complicated things off to SDISel to handle, while handling the rest
of the block itself.

To help support this, reorganize the SelectionDAG class so that it
is allocated once and reused throughout a function, instead of
being completely reallocated for each block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55219 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-23 02:25:05 +00:00
Dan Gohman
815ffa24c4 SelectionDAGISel::SelectRootInit does not need to be virtual.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55122 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-21 16:06:51 +00:00
Gordon Henriksen
5eca075b74 Rename some GC classes so that their roll will hopefully be clearer.
In particular, Collector was confusing to implementors. Several
thought that this compile-time class was the place to implement
their runtime GC heap. Of course, it doesn't even exist at runtime.
Specifically, the renames are:

  Collector               -> GCStrategy
  CollectorMetadata       -> GCFunctionInfo
  CollectorModuleMetadata -> GCModuleInfo
  CollectorRegistry       -> GCRegistry
  Function::getCollector  -> getGC (setGC, hasGC, clearGC)

Several accessors and nested types have also been renamed to be
consistent. These changes should be obvious.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54899 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-17 18:44:35 +00:00
Dan Gohman
925a7e8ed6 Rename SelectionDAGISel's FastISel to Fast, to begin to make
room for the new FastISel instruction selection code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54749 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-13 19:47:40 +00:00
Evan Cheng
39fd6e81b1 Factor code that finalize PHI nodes, jump tables, etc. out of SelectBasicBlock. No functionality changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54438 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-07 00:43:25 +00:00
Dan Gohman
fed90b6d09 Fold the useful features of alist and alist_node into ilist, and
a new ilist_node class, and remove them. Unlike alist_node,
ilist_node doesn't attempt to manage storage itself, so it avoids
the associated problems, including being opaque in gdb.

Adjust the Recycler class so that it doesn't depend on alist_node.
Also, change it to use explicit Size and Align parameters, allowing
it to work when the largest-sized node doesn't have the greatest
alignment requirement.

Change MachineInstr's MachineMemOperand list from a pool-backed
alist to a std::list for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54146 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-28 21:51:04 +00:00
Dan Gohman
475871a144 Rename SDOperand to SDValue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54128 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-27 21:46:04 +00:00
Dan Gohman
462dc7f496 Add titles to the various SelectionDAG viewGraph calls
that include useful information like the name of the
block being viewed and the current phase of compilation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53872 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-21 20:00:07 +00:00
Dan Gohman
5e84368b26 Reapply 53476 and 53480, with a fix so that it properly updates
the BB member to the current basic block after emitting
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53567 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14 18:19:29 +00:00
Evan Cheng
b5eec33dcd Back out 53476 and 53480 for now. Somehow they cause llc to miscompile 179.art.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53502 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-12 01:38:51 +00:00
Dan Gohman
dbe2a5a269 Add support for putting NamedRegionTimers in TimerGroups, and
use a timer group for the timers in SelectionDAGISel. Also,
Split scheduling out from emitting, to give each their own
timer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53476 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11 21:54:34 +00:00
Dan Gohman
dc2fbddd9d Trim unnecessary #includes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53471 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11 20:38:31 +00:00
Dan Gohman
0e5f1306b0 Pool-allocation for SDNodes. The pool is allocated once for each function,
and reused across SelectionDAGs.

This drastically reduces the number of calls to malloc/free made during
instruction selection, and improves memory locality.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53211 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-07 23:02:41 +00:00
Evan Cheng
e2c0a4fad5 DAGSize should not be public.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52977 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-01 18:49:06 +00:00
Evan Cheng
4576f6d7a9 Do not use computationally expensive scheduling heuristics with -fast.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52971 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-01 18:05:03 +00:00
Evan Cheng
db8d56b825 Split scheduling from instruction selection.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52923 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-30 20:45:06 +00:00
Chris Lattner
ead0d88ad7 add a new -enable-value-prop flag for llcbeta, that enables propagation
of value info (sign/zero ext info) from one MBB to another.  This doesn't
handle much right now because of two limitations:

1) only handles zext/sext, not random bit propagation (no assert exists 
   for this)
2) doesn't handle phis.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52383 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 06:09:18 +00:00
Duncan Sands
83ec4b6711 Wrap MVT::ValueType in a struct to get type safety
and better control the abstraction.  Rename the type
to MVT.  To update out-of-tree patches, the main
thing to do is to rename MVT::ValueType to MVT, and
rewrite expressions like MVT::getSizeInBits(VT) in
the form VT.getSizeInBits().  Use VT.getSimpleVT()
to extract a MVT::SimpleValueType for use in switch
statements (you will get an assert failure if VT is
an extended value type - these shouldn't exist after
type legalization).
This results in a small speedup of codegen and no
new testsuite failures (x86-64 linux).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52044 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-06 12:08:01 +00:00
Dan Gohman
86e1ebf9bb Avoid creating chain dependencies from CopyToReg nodes to load and store
nodes. This doesn't currently have much impact the generated code, but it
does produce simpler-looking SelectionDAGs, and consequently
simpler-looking ScheduleDAGs, because there are fewer spurious
dependencies.

In particular, CopyValueToVirtualRegister now uses the entry node as the
input chain dependency for new CopyToReg nodes instead of calling getRoot
and depending on the most recent memory reference.

Also, rename UnorderedChains to PendingExports and pull it up from being
a local variable in SelectionDAGISel::BuildSelectionDAG to being a
member variable of SelectionDAGISel, so that it doesn't have to be
passed around to all the places that need it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48893 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-27 19:56:19 +00:00
Gordon Henriksen
ce2247755e Enabling the target-independent garbage collection infrastructure by hooking it
up to the various compiler pipelines.

This doesn't actually add support for any GC algorithms, which means it 
temporarily breaks a few tests. To be fixed shortly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45669 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07 01:30:38 +00:00
Chris Lattner
84bc5427d6 Rename SSARegMap -> MachineRegisterInfo in keeping with the idea
that "machine" classes are used to represent the current state of
the code being compiled.  Given this expanded name, we can start 
moving other stuff into it.  For now, move the UsedPhysRegs and
LiveIn/LoveOuts vectors from MachineFunction into it.

Update all the clients to match.

This also reduces some needless #includes, such as MachineModuleInfo
from MachineFunction.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45467 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-31 04:13:23 +00:00
Chris Lattner
7ed47a1335 Don't attribute in file headers anymore. See llvmdev for the
discussion of this change.  Boy are my fingers tired. ;-)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 19:59:42 +00:00
Dan Gohman
5f43f92c69 If the source and destination pointers in an llvm.memmove are known
to not alias each other, it can be translated as an llvm.memcpy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41489 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-27 16:26:13 +00:00
Dan Gohman
81975f6dfd Add explicit keywords and remove spurious trailing semicolons.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41482 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-27 14:50:10 +00:00
Dan Gohman
dc9b3d0bb5 Add const to CanBeFoldedBy, CheckAndMask, and CheckOrMask.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40480 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-24 23:00:27 +00:00
Devang Patel
1997473cf7 Drop 'const'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-03 01:11:54 +00:00
Devang Patel
3e15bf33e0 Use 'static const char' instead of 'static const int'.
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-02 21:39:20 +00:00
Devang Patel
794fd75c67 Do not use typeinfo to identify pass in pass manager.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-01 21:15:47 +00:00
Anton Korobeynikov
4198c58c71 Next stage into switch lowering refactoring
1. Fix some bugs in the jump table lowering threshold
2. Implement much better metric for optimal pivot selection
3. Tune thresholds for different lowering methods
4. Implement shift-and trick for lowering small (<machine word
length) cases with few destinations. Good testcase will follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35816 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09 12:31:58 +00:00
Anton Korobeynikov
5502bf67cd Properly emit range comparisons for switch cases, where neighbour cases
go to the same destination. Now we're producing really good code for
switch-lower-feature.ll testcase


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35672 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-04 21:14:49 +00:00
Anton Korobeynikov
3a84b9baf6 First step of switch lowering refactoring: perform worklist-driven
strategy, emit JT's where possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35338 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-25 15:07:15 +00:00
Dan Gohman
423c2260f9 Add the 'explicit' keyword to several constructors that accept one
argument that don't appear intended as implicit-conversion operators.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35280 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-23 18:44:11 +00:00
Anton Korobeynikov
d0b82b301d Refactoring of formal parameter flags. Enable properly use of
zext/sext/aext stuff.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35008 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-07 16:25:09 +00:00
Anton Korobeynikov
0db79d86de Enumerate SDISel formal parameter attributes. Make use of new
enumeration.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34960 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-06 06:10:33 +00:00
Chris Lattner
5f8d61bbd8 remove dead method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31271 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-28 18:21:29 +00:00
Chris Lattner
571e434a34 Turn conditions like x<Y|z==q into multiple blocks.
This compiles Regression/CodeGen/X86/or-branch.ll into:

_foo:
        subl $12, %esp
        call L_bar$stub
        movl 20(%esp), %eax
        movl 16(%esp), %ecx
        cmpl $5, %eax
        jl LBB1_1       #cond_true
LBB1_3: #entry
        testl %ecx, %ecx
        jne LBB1_2      #UnifiedReturnBlock
LBB1_1: #cond_true
        call L_bar$stub
        addl $12, %esp
        ret
LBB1_2: #UnifiedReturnBlock
        addl $12, %esp
        ret

instead of:

_foo:
        subl $12, %esp
        call L_bar$stub
        movl 20(%esp), %eax
        movl 16(%esp), %ecx
        cmpl $4, %eax
        setg %al
        testl %ecx, %ecx
        setne %cl
        testb %cl, %al
        jne LBB1_2      #UnifiedReturnBlock
LBB1_1: #cond_true
        call L_bar$stub
        addl $12, %esp
        ret
LBB1_2: #UnifiedReturnBlock
        addl $12, %esp
        ret

And on ppc to:

        cmpwi cr0, r29, 5
        blt cr0, LBB1_1 ;cond_true
LBB1_3: ;entry
        cmplwi cr0, r30, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

instead of:

        cmpwi cr7, r4, 4
        mfcr r2
        addic r4, r3, -1
        subfe r30, r4, r3
        rlwinm r29, r2, 30, 31, 31
        and r2, r29, r30
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31230 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-27 21:36:01 +00:00
Chris Lattner
57ab65972e Generalize CaseBlock a bit more:
Rename LHSBB/RHSBB to TrueBB/FalseBB.  Allow the RHS value to be null,
in which case the LHS is treated as a bool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31166 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-24 17:57:59 +00:00
Chris Lattner
7b248d9866 generalize 'CaseBlock'. It really allows any comparison to be inserted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31161 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-24 17:03:35 +00:00
Evan Cheng
bddc5d04d7 Start checking from the root of the matched sub-tree.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30957 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-14 08:30:53 +00:00
Chris Lattner
755480681c add two helper methods.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30869 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-11 03:58:02 +00:00
Chris Lattner
57f9a43c64 refactor critical edge breaking out into the SplitCritEdgesForPHIConstants method.
This is a baby step towards fixing PR925.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30643 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-28 06:17:10 +00:00
Evan Cheng
fe8dc2e2c8 Move DAGSize to SelectionDAGISel; it's used in tablegen'd isel code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29547 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-07 22:16:08 +00:00
Jim Laskey
9373beba60 Now that the ISel is available, it's possible to create a default instruction
scheduler creator.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29452 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-01 19:14:14 +00:00
Jim Laskey
9ff542f2cc 1. Change use of "Cache" to "Default".
2. Added argument to instruction scheduler creators so the creators can do
special things.
3. Repaired target hazard code.
4. Misc.

More to follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29450 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-01 18:29:48 +00:00