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63 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
c66d36028b Trim an unneeded header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137184 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-09 23:49:21 +00:00
Rafael Espindola
6a9d2b13fd Move most of the pre BB code to TailDuplicateAndUpdate. Change the 
HasIndirectbr variable to be just that. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134371 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-04 01:21:42 +00:00
Rafael Espindola
c0af352038 Reduce indentation and fix the count of how many PHIs we have inserted. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134370 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-04 00:13:36 +00:00
Evan Cheng
e837dead3c - 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134021 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-28 19:10:37 +00:00
Rafael Espindola
40179bf874 Simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133798 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-24 15:50:56 +00:00
Rafael Espindola
d7f35fa824 Now that bb with phis are not considered simple, duplicate them even if 
we cannot duplicate to every predecessor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133797 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-24 15:47:41 +00:00
Rafael Espindola
1f71549a2e Simplify now that blocks with phis are not considered simple. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133793 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-24 14:04:13 +00:00
Rafael Espindola
9dbbd87938 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133682 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-23 03:41:29 +00:00
Rafael Espindola
d6379a993c Reenable tail duplication of bb with just an unconditional jump, but 
don't remove blocks that have their address taken.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133659 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-22 22:31:57 +00:00
Chad Rosier
f78b5952c3 Revert r133607. This is causing failures in the Clang gccTestSuite. 
Specifically, gcc.c-torture/compile/pr21356.c.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133646 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-22 21:13:23 +00:00
Rafael Espindola
c9be257261 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133607 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-22 04:01:58 +00:00
Rafael Espindola
b87e37f1b1 Disable again. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133446 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-20 17:04:08 +00:00
Rafael Espindola
689c24768b 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133432 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-20 14:11:42 +00:00
Duncan Sands
2ee2d93232 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133430 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-20 09:26:23 +00:00
Francois Pichet
289a27946f Fix MSVC build. next() function already exists in the MSVC headers. This create a overload conflict. Make sure we pick up the llvm one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133416 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-20 05:19:37 +00:00
Rafael Espindola
275c1f9f93 Teach early dup how to duplicate basic blocks with one successor and only phi instructions 
into more complex blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133415 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-20 04:16:35 +00:00
Rafael Espindola
db3983bd76 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133255 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-17 13:59:43 +00:00
Rafael Espindola
ec324e5ae4 Enable early duplication of small blocks. There are still improvements to 
be made, but this is already a win.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133240 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-17 05:54:50 +00:00
Rafael Espindola
33b4658772 Removed tabs. Also fixed my editor... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132857 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-10 21:01:53 +00:00
Rafael Espindola
9a9a3a5c0f Remove duplicated test. 
Thanks Bob Wilson for noticing it!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132851 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-10 20:08:23 +00:00
Rafael Espindola
d3f4eeaec1 Make the optional verification step more strict. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132822 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 23:55:56 +00:00
Rafael Espindola
4d7b4573f9 Avoid a gcc warning about multiline comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132821 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 23:51:45 +00:00
Rafael Espindola
689d7d5dff 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132816 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 23:22:56 +00:00
Rafael Espindola
0f28c3f0c3 Also consider phi nodes when deciding if a register is live out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132814 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 22:53:47 +00:00
Rafael Espindola
a899b22310 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132806 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 21:43:25 +00:00
Rafael Espindola
c2e9a50dfb A PHI in this basic block is a use in another basic block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132805 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 20:55:41 +00:00
Rafael Espindola
54c256233f Refactor some checks into shouldTailDuplicate. Update comments. 
No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132798 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-09 19:54:42 +00:00
Rafael Espindola
d69f85eb41 Fix count. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132749 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-08 14:23:19 +00:00
Rafael Espindola
0cdca089b2 Count how many phis we are creating. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132748 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-08 14:13:31 +00:00
Evan Cheng
c8b90e22a8 Update comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124843 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-04 01:10:12 +00:00
Jakob Stoklund Olesen
8352062e52 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124564 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-30 20:38:12 +00:00
Evan Cheng
c3f507f98a Re-apply r124518 with fix. Watch out for invalidated iterator. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124526 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-29 04:46:23 +00:00
Evan Cheng
b0a42fdb36 Revert r124518. It broke Linux self-host. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124522 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-29 02:43:04 +00:00
Evan Cheng
5e6940788f Re-commit r124462 with fixes. Tail recursion elim will now dup ret into unconditional predecessor to enable TCE on demand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124518 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-29 01:29:26 +00:00
Evan Cheng
1b5c0cb71d Revert r124462. There are a few big regressions that I need to fix first. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124478 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-28 07:12:38 +00:00
Evan Cheng
40f64cb0de - 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124462 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-28 02:19:21 +00:00
Jakob Stoklund Olesen
c9df025e33 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123155 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-10 02:58:51 +00:00
Owen Anderson
90c579de5a Reapply r110396, with fixes to appease the Linux buildbot gods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-06 18:33:48 +00:00
Owen Anderson
1f74590e9d Revert r110396 to fix buildbots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-06 00:23:35 +00:00
Owen Anderson
9ccaf53ada 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-05 23:42:04 +00:00
Jakob Stoklund Olesen
04c528a0c8 Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway. 
TII::isMoveInstr is going tobe completely removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108507 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-16 04:45:42 +00:00
Jakob Stoklund Olesen
1e1098c6f3 Replace copyRegToReg with COPY everywhere in lib/CodeGen except for FastISel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108062 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-10 22:42:59 +00:00
Dan Gohman
34dcc6fadc Add a DebugLoc argument to TargetInstrInfo::copyRegToReg, so that it 
doesn't have to guess.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103194 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-06 20:33:48 +00:00
Devang Patel
cbe1e31732 Ignore debug value instructions while analyzing BB for tail duplication. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98675 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-16 21:02:07 +00:00
Chris Lattner
18589de9b1 eliminate InvalidateLabel and LabelIDList from MMI and replace 
them with a counter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98462 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-14 02:24:55 +00:00
Jakob Stoklund Olesen
09eeac9f5f 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95832 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-11 00:34:33 +00:00
Chris Lattner
518bb53485 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95687 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-09 19:54:29 +00:00
Bob Wilson
cb44b28f4d Treat indirect branches specially only during pre-regalloc tail duplication, 
not during the later post-alloc tail duplication.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93600 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-16 00:42:25 +00:00
Jakob Stoklund Olesen
057d53993c Simplify logic. Any functional change is unintended. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93540 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-15 19:59:57 +00:00
Bob Wilson
bfdcf3bd49 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93505 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-15 06:29:17 +00:00