Commit Graph

13246 Commits

Author SHA1 Message Date
Andrew Trick 02a80da331 misched interface: Expose the MachineScheduler pass.
Allow targets to provide their own schedulers (subclass of
ScheduleDAGInstrs) to the misched pass. Select schedulers using
-misched=...

llvm-svn: 152278
2012-03-08 01:41:12 +00:00
Andrew Trick 69b4204c18 Cleanup VLIWPacketizer to use the updated ScheduleDAGInstrs interface.
llvm-svn: 152262
2012-03-07 23:01:09 +00:00
Andrew Trick 9a0c583954 misched prep: Expose the ScheduleDAGInstrs interface so targets may
implement their own MachineScheduler.

llvm-svn: 152261
2012-03-07 23:01:06 +00:00
Andrew Trick d743f71e82 misched prep: Remove LLVM_LIBRARY_VISIBILITY from ScheduleDAGInstrs.
llvm-svn: 152260
2012-03-07 23:01:02 +00:00
Andrew Trick 9b9dea5d07 misched prep: Comment the ScheduleDAGInstrs interface.
llvm-svn: 152259
2012-03-07 23:00:59 +00:00
Andrew Trick 926d4736ed misched prep: Cleanup ScheduleDAGInstrs interface.
ScheduleDAGInstrs will be the main interface for MI-level
schedulers. Make sure it's readable: one page of protected fields, one
page of public methids.

llvm-svn: 152258
2012-03-07 23:00:57 +00:00
Andrew Trick 67561b3ef2 misched prep: remove extra "protected"
llvm-svn: 152257
2012-03-07 23:00:54 +00:00
Andrew Trick a316faabec misched prep: rename InsertPos to End.
ScheduleDAGInstrs knows nothing about how instructions will be moved or inserted.

llvm-svn: 152256
2012-03-07 23:00:52 +00:00
Andrew Trick 52226d409b misched preparation: rename core scheduler methods for consistency.
We had half the API with one convention, half with another. Now was a
good time to clean it up.

llvm-svn: 152255
2012-03-07 23:00:49 +00:00
Chandler Carruth 636ee38a88 Try to clarify this comment some.
llvm-svn: 152221
2012-03-07 10:13:40 +00:00
Chandler Carruth 962152ca7a Remove another outbreak of customized (and completely broken) hashing.
This one is particularly annoying because the hashing algorithm is
highly specialized, with a strange "equivalence" definition that subsets
the fields involved.

Still, this looks at the exact same set of data as the old code, but
without bitwise or-ing over parts of it and other mixing badness. No
functionality changed here. I've left a substantial fixme about the fact
that there is a cleaner and more principled way to do this, but it
requires making the equality definition actual stable for particular
types...

llvm-svn: 152218
2012-03-07 09:39:46 +00:00
Bill Wendling 7c5dcb6ccf Where the BranchFolding pass removes a branch then adds another better branch,
the DebugLoc information can be maintained throughout by grabbing the DebugLoc
before the RemoveBranch and then passing the result to the InsertBranch.
Patch by Andrew Stanford-Jason!

llvm-svn: 152212
2012-03-07 08:49:42 +00:00
Andrew Trick 1a1b54a2da Fix cmake
llvm-svn: 152210
2012-03-07 05:46:04 +00:00
Andrew Trick f9fa8afdaa comment
llvm-svn: 152209
2012-03-07 05:21:54 +00:00
Andrew Trick 60cf03e772 misched preparation: clarify ScheduleDAG and ScheduleDAGInstrs roles.
ScheduleDAG is responsible for the DAG: SUnits and SDeps. It provides target hooks for latency computation.

ScheduleDAGInstrs extends ScheduleDAG and defines the current scheduling region in terms of MachineInstr iterators. It has access to the target's scheduling itinerary data. ScheduleDAGInstrs provides the logic for building the ScheduleDAG for the sequence of MachineInstrs in the current region. Target's can implement highly custom schedulers by extending this class.

ScheduleDAGPostRATDList provides the driver and diagnostics for current postRA scheduling. It maintains a current Sequence of scheduled machine instructions and logic for splicing them into the block. During scheduling, it uses the ScheduleHazardRecognizer provided by the target.

Specific changes:
- Removed driver code from ScheduleDAG. clearDAG is the only interface needed.

- Added enterRegion/exitRegion hooks to ScheduleDAGInstrs to delimit the scope of each scheduling region and associated DAG. They should be used to setup and cleanup any region-specific state in addition to the DAG itself. This is necessary because we reuse the same ScheduleDAG object for the entire function. The target may extend these hooks to do things at regions boundaries, like bundle terminators. The hooks are called even if we decide not to schedule the region. So all instructions in a block are "covered" by these calls.

- Added ScheduleDAGInstrs::begin()/end() public API.

- Moved Sequence into the driver layer, which is specific to the scheduling algorithm.

llvm-svn: 152208
2012-03-07 05:21:52 +00:00
Andrew Trick 42756e2eb4 ScheduleDAGInstrs comments
llvm-svn: 152207
2012-03-07 05:21:47 +00:00
Andrew Trick e932bb77b5 misched preparation: modularize schedule emission.
ScheduleDAG has nothing to do with how the instructions are scheduled.

llvm-svn: 152206
2012-03-07 05:21:44 +00:00
Andrew Trick edee68ce1b misched preparation: modularize schedule printing.
ScheduleDAG will not refer to the scheduled instruction sequence.

llvm-svn: 152205
2012-03-07 05:21:40 +00:00
Andrew Trick 46a58664f7 misched preparation: modularize schedule verification.
ScheduleDAG will not refer to the scheduled instruction sequence.

llvm-svn: 152204
2012-03-07 05:21:36 +00:00
Andrew Trick 7c6c41a56a whitespace
llvm-svn: 152203
2012-03-07 05:21:32 +00:00
Andrew Trick a5f19560fb Added -view-misched=dags options.
llvm-svn: 152178
2012-03-07 00:18:25 +00:00
Andrew Trick 1b2324d0e8 Cleanup in preparation for misched: Move DAG visualization logic.
Soon, ScheduleDAG will not refer to the BB.

llvm-svn: 152177
2012-03-07 00:18:22 +00:00
Andrew Trick 320c7030db Added MachineBasicBlock::getFullName() to standardize/factor codegen diagnostics.
llvm-svn: 152176
2012-03-07 00:18:18 +00:00
Andrew Trick 5297d8df99 whitespace
llvm-svn: 152175
2012-03-07 00:18:15 +00:00
Andrew Trick 0c84efe8dd Cleanup: DAG building is specific to either SD or MI scheduling. Not part of the target interface.
llvm-svn: 152174
2012-03-07 00:18:12 +00:00
Andrew Trick 3222c0985b misched comments
llvm-svn: 152173
2012-03-07 00:18:08 +00:00
Andrew Trick 3b6eb1e5ea misched: Use the StartBlock/FinishBlock hooks
llvm-svn: 152172
2012-03-07 00:18:05 +00:00
Eric Christopher 54cf8ff45e Add the DW_AT_APPLE_runtime_class attribute to forward declarations
as well as completely defined classes.

This fixes rdar://10956070

llvm-svn: 152171
2012-03-07 00:15:19 +00:00
Evan Cheng 80893ce5f5 Extend r148086 to check for [r +/- reg] address mode. This fixes queens performance regression (due to increased register pressure from overly aggressive pre-inc formation).
llvm-svn: 152162
2012-03-06 23:33:32 +00:00
Jakob Stoklund Olesen 936656ba2f Hoist common code out of if statement.
llvm-svn: 152153
2012-03-06 22:27:13 +00:00
Evan Cheng 217a704acc Avoid finalizeBundles infinite looping.
llvm-svn: 152089
2012-03-06 02:00:52 +00:00
Owen Anderson 2ee7c4dfc5 Make it possible for a target to mark FSUB as Expand. This requires providing a default expansion (FADD+FNEG), and teaching DAGCombine not to form FSUBs post-legalize if they are not legal.
llvm-svn: 152079
2012-03-06 00:29:31 +00:00
Jim Grosbach fd93a59557 Make MCRegisterInfo available to the the MCInstPrinter.
Used to allow context sensitive printing of super-register or sub-register
references.

llvm-svn: 152043
2012-03-05 19:33:20 +00:00
Bill Wendling 7cf6db7e3c Fix warnings about adding a bool to a string.
Patch by Sean Silva!

llvm-svn: 152042
2012-03-05 19:29:36 +00:00
Craig Topper 4b02a29eba Convert more GenRegisterInfo tables from unsigned to uint16_t to reduce static data size.
llvm-svn: 152016
2012-03-05 05:37:41 +00:00
Jakob Stoklund Olesen 59bc8c437a Stop fixing bad machine code in LiveIntervalAnalysis.
The first def of a virtual register cannot also read the register.
Assert on such bad machine code instead of trying to fix it.
TwoAddressInstructionPass should never create code like that.

llvm-svn: 152010
2012-03-04 19:19:10 +00:00
Jakob Stoklund Olesen 6759dd078a Stop adding <imp-def> operands when coalescing sub-registers.
We are already setting <undef> flags, and that is good enough. The
<imp-def> operands don't mean anything any more.

llvm-svn: 152009
2012-03-04 19:19:07 +00:00
Craig Topper 1d32658877 Use uint16_t to store register overlaps to reduce static data.
llvm-svn: 152001
2012-03-04 10:43:23 +00:00
Craig Topper b35eacb0f0 Use uint16_t instead of unsigned to store registers in reg classes. Reduces static data size.
llvm-svn: 151998
2012-03-04 10:16:38 +00:00
Craig Topper 420525ce3b Use uint16_t to store registers in callee saved register tables to reduce size of static data.
llvm-svn: 151996
2012-03-04 03:33:22 +00:00
Eric Christopher 1df94bfe8a Grammar-o in function name.
llvm-svn: 151875
2012-03-02 02:11:47 +00:00
Eric Christopher e19f4cd066 Grammar.
llvm-svn: 151874
2012-03-02 01:57:55 +00:00
Eric Christopher 7772531567 If the linkage name doesn't exist we're supposed to emit a reference
to the string table for the function name, not the function name.

llvm-svn: 151873
2012-03-02 01:57:52 +00:00
Eric Christopher 7524fe4551 Revert "Reorder the sections being output to reduce the number of assembler"
The inline table needs to be constructed ahead of time so that it doesn't try to
create new strings while we're emitting everything.

This reverts commit a8ff9bccb399183cdd5f1c3cec2bda763664b4b0.

llvm-svn: 151864
2012-03-02 00:30:24 +00:00
Eric Christopher 66b0721014 Reorder the sections being output to reduce the number of assembler
fixups that are being used to determine section offsets. Reduces
the total number of fixups by 50% for a non-trivial testcase.

Part of rdar://10413936

llvm-svn: 151852
2012-03-01 22:50:31 +00:00
Michael J. Spencer 35145f830a Minimal changes for LLVM to compile under VS11.
llvm-svn: 151849
2012-03-01 22:42:52 +00:00
James Molloy f6298e9281 Fix a codegen fault in which log2 or exp2 could be dead-code eliminated even though they could have sideeffects.
Only allow log2/exp2 to be converted to an intrinsic if they are declared "readnone".

llvm-svn: 151807
2012-03-01 14:32:18 +00:00
Jakob Stoklund Olesen abe8c09b20 Make InlineSpiller bundle-aware.
Simply treat bundles as instructions. Spill code is inserted between
bundles, never inside a bundle.  Rewrite all operands in a bundle at
once.

Don't attempt and memory operand folding inside bundles.

llvm-svn: 151787
2012-03-01 01:43:25 +00:00
Jakob Stoklund Olesen d256c21666 Move getBundleStart() into MachineInstrBundle.h.
This allows the function to be inlined, and makes it suitable for use in
getInstructionIndex().

Also provide a const version. C++ is great for touch typing practice.

llvm-svn: 151782
2012-03-01 01:26:01 +00:00
Lang Hames 76e66c31a0 Don't redundantly copy implicit operands when rematerializing.
While we're at it - don't copy vreg implicit operands while rematerializing.
This fixes PR12138.

llvm-svn: 151779
2012-03-01 00:41:17 +00:00