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63 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
f7f4398587 Trim an unneeded header. 
llvm-svn: 137184
 2011-08-09 23:49:21 +00:00
Rafael Espindola
962773db64 Move most of the pre BB code to TailDuplicateAndUpdate. Change the 
HasIndirectbr variable to be just that. No functionality change.

llvm-svn: 134371
 2011-07-04 01:21:42 +00:00
Rafael Espindola
ce4f4ff705 Reduce indentation and fix the count of how many PHIs we have inserted. 
llvm-svn: 134370
 2011-07-04 00:13:36 +00:00
Evan Cheng
4a169be530 - Rename TargetInstrDesc, TargetOperandInfo to MCInstrDesc and MCOperandInfo and 
sink them into MC layer.
- Added MCInstrInfo, which captures the tablegen generated static data. Chang
TargetInstrInfo so it's based off MCInstrInfo.

llvm-svn: 134021
 2011-06-28 19:10:37 +00:00
Rafael Espindola
701cdf4f09 Simplify 
llvm-svn: 133798
 2011-06-24 15:50:56 +00:00
Rafael Espindola
b5901540ac Now that bb with phis are not considered simple, duplicate them even if 
we cannot duplicate to every predecessor.

llvm-svn: 133797
 2011-06-24 15:47:41 +00:00
Rafael Espindola
9876e7ae10 Simplify now that blocks with phis are not considered simple. 
llvm-svn: 133793
 2011-06-24 14:04:13 +00:00
Rafael Espindola
151ddd5335 Move more logic to shouldTailDuplicate and only duplicate regular bb before 
register allocation if it has a indirectbr or if we can duplicate it to
every predecessor.

This fixes the SingleSource/Benchmarks/Shootout-C++/matrix.cpp regression but
keeps the previous improvements to sunspider.

llvm-svn: 133682
 2011-06-23 03:41:29 +00:00
Rafael Espindola
e57d6977be Reenable tail duplication of bb with just an unconditional jump, but 
don't remove blocks that have their address taken.

llvm-svn: 133659
 2011-06-22 22:31:57 +00:00
Chad Rosier
5e6ecb23a4 Revert r133607. This is causing failures in the Clang gccTestSuite. 
Specifically, gcc.c-torture/compile/pr21356.c.

llvm-svn: 133646
 2011-06-22 21:13:23 +00:00
Rafael Espindola
9cc87c6608 Reenable the optimization added in 133415, but change the definition of a "simple" bb to 
be one with only one unconditional branch and no phis. Duplicating the phis in this case
is possible, but requeres liveness analysis or breaking edges.

llvm-svn: 133607
 2011-06-22 04:01:58 +00:00
Rafael Espindola
1c53a39ff9 Disable again. 
llvm-svn: 133446
 2011-06-20 17:04:08 +00:00
Rafael Espindola
a4e0983e26 Re enable 133415 with two fixes 
* Don't introduce a duplicated bb in the CFG
* When making a branch unconditional, clear the PredCond array so that it
  is really unconditional.

llvm-svn: 133432
 2011-06-20 14:11:42 +00:00
Duncan Sands
02396a97be Disable the logic added by rafael in commit 133415 to see if it brings the 
dragonegg buildbots back to life.  Original commit message:
Teach early dup how to duplicate basic blocks with one successor and only phi instructions
into more complex blocks.

llvm-svn: 133430
 2011-06-20 09:26:23 +00:00
Francois Pichet
fb2d44e57b Fix MSVC build. next() function already exists in the MSVC headers. This create a overload conflict. Make sure we pick up the llvm one. 
llvm-svn: 133416
 2011-06-20 05:19:37 +00:00
Rafael Espindola
ff05956b0b Teach early dup how to duplicate basic blocks with one successor and only phi instructions 
into more complex blocks.

llvm-svn: 133415
 2011-06-20 04:16:35 +00:00
Rafael Espindola
f9ff169e9c Two fixes relating to debug value: 
* We should change the generated code because of a debug use.
* Avoid creating debug uses of undef, as they become a kill.
Test to follow.

llvm-svn: 133255
 2011-06-17 13:59:43 +00:00
Rafael Espindola
7adb7e304b Enable early duplication of small blocks. There are still improvements to 
be made, but this is already a win.

llvm-svn: 133240
 2011-06-17 05:54:50 +00:00
Rafael Espindola
58fdae0c51 Removed tabs. Also fixed my editor... 
llvm-svn: 132857
 2011-06-10 21:01:53 +00:00
Rafael Espindola
d6a9a045e0 Remove duplicated test. 
Thanks Bob Wilson for noticing it!

llvm-svn: 132851
 2011-06-10 20:08:23 +00:00
Rafael Espindola
aabc17c8ca Make the optional verification step more strict. 
llvm-svn: 132822
 2011-06-09 23:55:56 +00:00
Rafael Espindola
f3a32b0e25 Avoid a gcc warning about multiline comments. 
llvm-svn: 132821
 2011-06-09 23:51:45 +00:00
Rafael Espindola
48351feabc On last fix to the early tail duplication. 
With this I am able to bootstrap clang with early tail duplication enabled
for any small bb and setting tail-dup-size to a relatively large value(8) to
stress this code.

llvm-svn: 132816
 2011-06-09 23:22:56 +00:00
Rafael Espindola
7993bc1353 Also consider phi nodes when deciding if a register is live out. 
llvm-svn: 132814
 2011-06-09 22:53:47 +00:00
Rafael Espindola
4b78a41c8c AnalyzeBranch modifies the bb, but we don't want to modify a bb with 
eh edges. Swap the order of the checks to avoid it.

llvm-svn: 132806
 2011-06-09 21:43:25 +00:00
Rafael Espindola
5fd95a9c94 A PHI in this basic block is a use in another basic block. 
llvm-svn: 132805
 2011-06-09 20:55:41 +00:00
Rafael Espindola
b39a7c9540 Refactor some checks into shouldTailDuplicate. Update comments. 
No functionality change.

llvm-svn: 132798
 2011-06-09 19:54:42 +00:00
Rafael Espindola
e987e93aa0 Fix count. 
llvm-svn: 132749
 2011-06-08 14:23:19 +00:00
Rafael Espindola
c96d74d84e Count how many phis we are creating. 
llvm-svn: 132748
 2011-06-08 14:13:31 +00:00
Evan Cheng
dda52de359 Update comments. 
llvm-svn: 124843
 2011-02-04 01:10:12 +00:00
Jakob Stoklund Olesen
430d0693dc Respect the -tail-dup-size command line option even when optimizing for size. 
This is similar to the -unroll-threshold option. There should be no change in
behavior when -tail-dup-size is not explicit on the llc command line.

llvm-svn: 124564
 2011-01-30 20:38:12 +00:00
Evan Cheng
4af5487b74 Re-apply r124518 with fix. Watch out for invalidated iterator. 
llvm-svn: 124526
 2011-01-29 04:46:23 +00:00
Evan Cheng
1f943b9b13 Revert r124518. It broke Linux self-host. 
llvm-svn: 124522
 2011-01-29 02:43:04 +00:00
Evan Cheng
a1e4cb5f09 Re-commit r124462 with fixes. Tail recursion elim will now dup ret into unconditional predecessor to enable TCE on demand. 
llvm-svn: 124518
 2011-01-29 01:29:26 +00:00
Evan Cheng
5b6c72e549 Revert r124462. There are a few big regressions that I need to fix first. 
llvm-svn: 124478
 2011-01-28 07:12:38 +00:00
Evan Cheng
7031f450b3 - Stop simplifycfg from duplicating "ret" instructions into unconditional 
branches. PR8575, rdar://5134905, rdar://8911460.
- Allow codegen tail duplication to dup small return blocks after register
  allocation is done.

llvm-svn: 124462
 2011-01-28 02:19:21 +00:00
Jakob Stoklund Olesen
32f1783ca1 Simplify a bunch of isVirtualRegister() and isPhysicalRegister() logic. 
These functions not longer assert when passed 0, but simply return false instead.

No functional change intended.

llvm-svn: 123155
 2011-01-10 02:58:51 +00:00
Owen Anderson
f2fea95f2f Reapply r110396, with fixes to appease the Linux buildbot gods. 
llvm-svn: 110460
 2010-08-06 18:33:48 +00:00
Owen Anderson
aadd8a89ca Revert r110396 to fix buildbots. 
llvm-svn: 110410
 2010-08-06 00:23:35 +00:00
Owen Anderson
b9762c07cb Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.

llvm-svn: 110396
 2010-08-05 23:42:04 +00:00
Jakob Stoklund Olesen
bcee53a2b8 Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway. 
TII::isMoveInstr is going tobe completely removed.

llvm-svn: 108507
 2010-07-16 04:45:42 +00:00
Jakob Stoklund Olesen
f0d1bf23eb Replace copyRegToReg with COPY everywhere in lib/CodeGen except for FastISel. 
llvm-svn: 108062
 2010-07-10 22:42:59 +00:00
Dan Gohman
497e752655 Add a DebugLoc argument to TargetInstrInfo::copyRegToReg, so that it 
doesn't have to guess.

llvm-svn: 103194
 2010-05-06 20:33:48 +00:00
Devang Patel
16c77b14f2 Ignore debug value instructions while analyzing BB for tail duplication. 
llvm-svn: 98675
 2010-03-16 21:02:07 +00:00
Chris Lattner
de49dbc188 eliminate InvalidateLabel and LabelIDList from MMI and replace 
them with a counter.

llvm-svn: 98462
 2010-03-14 02:24:55 +00:00
Jakob Stoklund Olesen
3b5abdefc3 Reuse operand location when updating PHI instructions. 
Calling RemoveOperand is very expensive on huge PHI instructions. This makes
early tail duplication run twice as fast on the Firefox JavaScript
interpreter.

llvm-svn: 95832
 2010-02-11 00:34:33 +00:00
Chris Lattner
7acf9be6c4 move target-independent opcodes out of TargetInstrInfo 
into TargetOpcodes.h.  #include the new TargetOpcodes.h
into MachineInstr.  Add new inline accessors (like isPHI())
to MachineInstr, and start using them throughout the 
codebase.

llvm-svn: 95687
 2010-02-09 19:54:29 +00:00
Bob Wilson
a7043345ee Treat indirect branches specially only during pre-regalloc tail duplication, 
not during the later post-alloc tail duplication.

llvm-svn: 93600
 2010-01-16 00:42:25 +00:00
Jakob Stoklund Olesen
cf4c604899 Simplify logic. Any functional change is unintended. 
llvm-svn: 93540
 2010-01-15 19:59:57 +00:00
Bob Wilson
b9a6da20e8 Change pre-regalloc tail duplication to only duplicate indirect branch blocks. 
The pre-regalloc pass caused some regressions in both compile time and
performance of the generated code, and it did not improve performance, except
for indirect branches.  I also moved the check for single-block loops to speed
up the common case when running the taildup pass before reg allocation.

llvm-svn: 93505
 2010-01-15 06:29:17 +00:00