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87 Commits

Author SHA1 Message Date
David Goodwin
82c7248518 Make AntiDepReg.h internal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85412 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 18:29:54 +00:00
David Goodwin
e10deca33e Allow the aggressive anti-dep breaker to process the same region multiple times. This is necessary because new anti-dependencies are exposed when "current" ones are broken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85166 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 22:31:16 +00:00
David Goodwin
ada0ef86d9 Define virtual destructor in *.cpp file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85146 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:41:00 +00:00
David Goodwin
348777110a Add aggressive anti-dependence breaker. Currently it is not the default for any target. Enable with -break-anti-dependencies=all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85145 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:32:42 +00:00
David Goodwin
2e7be612d5 Break anti-dependence breaking out into its own class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85127 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 16:59:04 +00:00
Nick Lewycky
f5a86f45e7 Remove includes of Support/Compiler.h that are no longer needed after the 
VISIBILITY_HIDDEN removal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85043 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-25 06:57:41 +00:00
Nick Lewycky
6726b6d75a Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces. 
Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-25 06:33:48 +00:00
David Goodwin
4c3715c2e5 Allow the target to select the level of anti-dependence breaking that should be performed by the post-RA scheduler. The default is none. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84911 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-22 23:19:17 +00:00
Dan Gohman
c1ae8c9b8f Revert r84658 and r84691. They were causing llvm-gcc bootstrap to fail. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84727 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-21 01:44:44 +00:00
David Goodwin
7441d14873 Respect src register allocation requirements when breaking anti-dependencies. Remove some dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84691 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-20 22:50:43 +00:00
David Goodwin
480c529e02 Checkpoint more aggressive anti-dependency breaking for post-ra scheduler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84658 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-20 19:54:44 +00:00
Evan Cheng
fa16354e03 Change createPostRAScheduler so it can be turned off at llc -O1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84273 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-16 21:06:15 +00:00
Evan Cheng
c83da2f9e3 If post-alloc scheduler is not enabled, it should return false, not true. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84248 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-16 06:10:34 +00:00
David Goodwin
d452ea6a64 Add debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84011 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-13 19:16:03 +00:00
Dan Gohman
5bf7c2a346 Fix a missing initialization of PostRAScheduler's AA member. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83695 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-10 00:15:38 +00:00
Dan Gohman
a70dca156f Factor out LiveIntervalAnalysis' code to determine whether an instruction 
is trivially rematerializable and integrate it into
TargetInstrInfo::isTriviallyReMaterializable. This way, all places that
need to know whether an instruction is rematerializable will get the
same answer.

This enables the useful parts of the aggressive-remat option by
default -- using AliasAnalysis to determine whether a memory location
is invariant, and removes the questionable parts -- rematting operations
with virtual register inputs that may not be live everywhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83687 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-09 23:27:56 +00:00
Benjamin Kramer
8bff4af612 Fix a use-after-free in post-ra-scheduling. 
MI->addOperand invalidates references to it's operands, avoid touching
the operand after a new one was added.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83249 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-02 15:59:52 +00:00
David Goodwin
63bcbb72f7 All callee-saved registers are live-out of a return block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83223 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 23:28:47 +00:00
David Goodwin
9843a93e83 Remove neonfp attribute and instead set default based on CPU string. Add -arm-use-neon-fp to override the default. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83218 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 22:19:57 +00:00
David Goodwin
471850ab84 Restore the -post-RA-scheduler flag as an override for the target specification. Remove -mattr for setting PostRAScheduler enable and instead use CPU string. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83215 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 21:46:35 +00:00
David Goodwin
c7951f8e09 Use MachineFrameInfo.getPristineRegs() to determine which callee-saved registers are available for anti-dependency breaking. Some cleanup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83208 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 19:45:32 +00:00
Evan Cheng
714e8bc1fc Observe hasExtraSrcRegAllocReq and hasExtraDefRegAllocReq. Do not change 
operands of instructions with these properties while breaking anti-dep.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83198 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 08:26:23 +00:00
Reid Kleckner
c277ab08a2 Fix integer overflow in instruction scheduling. This can happen if we have 
basic blocks that are so long that their size overflows a short.

Also assert that overflow does not happen in the future, as requested by Evan.

This fixes PR4401.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83159 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-30 20:15:38 +00:00
David Goodwin
0dad89fa94 Remove -post-RA-schedule flag and add a TargetSubtarget method to enable post-register-allocation scheduling. By default it is off. For ARM, enable/disable with -mattr=+/-postrasched. Enable by default for cortex-a8. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83122 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-30 00:10:16 +00:00
Jakob Stoklund Olesen
544df3651e Use KILL instead of IMPLICIT_DEF in LowerSubregs pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83007 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-28 20:32:46 +00:00
David Goodwin
8f909345bc Fix bug in kill flag updating for post-register-allocation scheduling. When the kill flag of a superreg needs to be cleared because there are one or more subregs live, we instead add implicit-defs of those subregs and leave the kill flag on the superreg. This allows us to end the live-range of the superreg without ending the live-ranges of the subregs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82629 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-23 16:35:25 +00:00
Evan Cheng
fb2e752e41 Enhance EmitInstrWithCustomInserter() so target can specify CFG changes that sdisel will use to properly complete phi nodes. 
Not functionality change yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82273 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-18 21:02:19 +00:00
Benjamin Kramer
be441c0f34 It's a bool, so treat it like one. Fixes a MSVC warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81112 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-06 12:10:17 +00:00
David Goodwin
5e41178a6e Create our own block initializer for kill fixups as the scheduling one wasn't doing the right thing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80958 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-03 22:15:25 +00:00
David Goodwin
1f15228398 Add hidden flags to allow binary search of post-RA scheduling errors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80702 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-01 18:34:03 +00:00
David Goodwin
a3251db21a Don't mark a register live at an undef use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80621 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-31 20:47:02 +00:00
David Goodwin
7886cd85b2 Another stab at fixing up register kill flags after post-RA scheduling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80410 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-29 00:11:13 +00:00
David Goodwin
88a589c4b3 Fixup register kills after scheduling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80002 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-25 17:03:05 +00:00
Chris Lattner
103289e938 convert LoopInfo.h and GraphWriter.h to use raw_ostream 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79836 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-23 07:19:13 +00:00
David Goodwin
2ffb0ce7dc Fix counting of Post-RA scheduling stalls. Improve debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78843 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-12 21:47:46 +00:00
Dan Gohman
da2775767b This logic was accidentally inverted in r78767. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78773 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-12 01:44:20 +00:00
Dan Gohman
26255adcaa Factor out the code for finding an available register for use 
in breaking an anti-dependence into a separate function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78767 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-12 01:33:27 +00:00
David Goodwin
7cd0118c36 Use DEBUG macro for debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78694 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-11 17:56:42 +00:00
David Goodwin
c93d8373c9 Add some debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78687 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-11 17:35:23 +00:00
David Goodwin
3a5f0d444c Replace DOUT. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78634 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-11 01:44:26 +00:00
David Goodwin
d94a4e5d8d Post RA scheduler changes. Introduce a hazard recognizer that uses the target schedule information to accurately model the pipeline. Update the scheduler to correctly handle multi-issue targets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78563 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-10 15:55:25 +00:00
Dan Gohman
845012e6d3 Use setPreservesAll and setPreservesCFG in CodeGen passes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-31 23:37:33 +00:00
Chris Lattner
2a38688494 inline the global 'getInstrOperandRegClass' function into its callers 
now that TargetOperandInfo does the heavy lifting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77508 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-29 21:36:49 +00:00
Torok Edwin
c23197a26f llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable. 
This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75640 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-14 16:55:14 +00:00
Torok Edwin
c25e7581b9 assert(0) -> LLVM_UNREACHABLE. 
Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75379 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-11 20:10:48 +00:00
Evan Cheng
d923fc621f Move getInstrOperandRegClass from the scheduler to TargetInstrInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70950 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-05 00:30:09 +00:00
Bob Wilson
d9df501704 Fix pr3954. The register scavenger asserts for inline assembly with 
register destinations that are tied to source operands.  The
TargetInstrDescr::findTiedToSrcOperand method silently fails for inline
assembly.  The existing MachineInstr::isRegReDefinedByTwoAddr was very
close to doing what is needed, so this revision makes a few changes to
that method and also renames it to isRegTiedToUseOperand (for consistency
with the very similar isRegTiedToDefOperand and because it handles both
two-address instructions and inline assembly with tied registers).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68714 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-09 17:16:43 +00:00
Duncan Sands
9e8bd0b362 Add parentheses to pacify gcc-4.3. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66653 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-11 09:04:34 +00:00
Dan Gohman
1274ced8a3 Fix a post-RA scheduling liveness bug. When a basic block is being 
scheduled in multiple regions, liveness data used by the
anti-dependence breaker is carried from one region to the next, however
the information reflects the state of the instructions before scheduling.
After scheduling, there may be new live range overlaps. Handle this by
pessimizing the liveness data carried between regions to the point where
it will be conservatively correct now matter how the earlier region is
scheduled. This fixes a miscompilation in 176.gcc with the post-RA
scheduler enabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66558 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-10 18:10:43 +00:00
Dan Gohman
47ac0f0c7c When scheduling a block in parts, keep track of the overall 
instruction index across each part. Instruction indices are used
to make live range queries, and live ranges can extend beyond
scheduling region boundaries.

Refactor the ScheduleDAGSDNodes class some more so that it
doesn't have to worry about this additional information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64288 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-11 04:27:20 +00:00