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f0785153e5
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4945 Commits

Author SHA1 Message Date
Evan Cheng
f0785153e5 Add comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49469 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 08:03:14 +00:00
Evan Cheng
80b09fe8bc Teach branch folding pass about implicit_def instructions. Unfortunately we can't just eliminate them since register scavenger expects every register use to be defined. However, we can delete them when there are no intra-block uses. Carefully removing some implicit def's which enable more blocks to be optimized away. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49461 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 02:32:10 +00:00
Evan Cheng
7e073baedb - More aggressively coalescing away copies whose source is defined by an implicit_def. 
- Added insert_subreg coalescing support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49448 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 20:57:25 +00:00
Evan Cheng
f20d943bc6 Missed a hasInterval check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49415 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 01:30:15 +00:00
Dale Johannesen
4e1b79459f Implement new llc flag -disable-required-unwind-tables. 
Corresponds to -fno-unwind-tables (usually default in gcc).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49361 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-08 00:10:24 +00:00
Dan Gohman
36b5c1338a Rename MemOperand to MachineMemOperand. This was suggested by 
review feedback from Chris quite a while ago. No functionality
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49348 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 19:35:22 +00:00
Roman Levenstein
dc1adac582 Re-commit of the r48822, where the infinite looping problem discovered 
by Dan Gohman is fixed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49330 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 10:06:32 +00:00
Chris Lattner
409a3d0837 Silence warning when no assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49284 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:46:45 +00:00
Torok Edwin
4fea2e982d Prefer to expand mask for xor to -1, so we have a chance to turn it into a not. 
If it cannot be expanded, it will keep the old behaviour and try to shrink the constant.
Part of enhancement for PR2191.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49280 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:23:02 +00:00
Gabor Greif
051a950000 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49277 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 20:25:17 +00:00
Evan Cheng
1dc7869025 1. IMPLICIT_DEF can *re-define* any register. 
2. Coalescer can now create an interesting situation where a register def can
   reaches itself without being killed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49246 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-05 01:27:09 +00:00
Dale Johannesen
a4091d34f3 Make sure both PendingLoads and PendingExports are flushed 
before an invoke.  Failure to do this causes references in
the landing pad to variables that were not set.  Fixes
g++.dg/eh/delayslot1.C
g++.dg/eh/fp-regs.C
g++.old-deja/g++.brendan/eh1.C



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49243 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 23:48:31 +00:00
Evan Cheng
fc5423d561 Undo PHI elimination copy placement patch. This causes coalescing (performace) issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49198 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 01:20:05 +00:00
Evan Cheng
e04f736545 This is done. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49197 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 01:19:03 +00:00
Andrew Lenharth
51dd8c9224 if some functions don't have debug info, we were outputing the same label at the start of each of those functions. This makes assemblers unhappy 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49176 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 17:37:43 +00:00
Evan Cheng
db9b1c3329 - Turn copies of implicit_def into implicit_def instructions. 
- Be smarter about coalescing copies from implicit_def.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49168 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:41:54 +00:00
Evan Cheng
f30a49d9e0 Special handling of zero-sized live intervals. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49167 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:40:27 +00:00
Evan Cheng
419852ca8a - Treat a live range defined by an implicit_def as a zero-sized one. 
- Eliminate an implicit_def when it's being spilled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49166 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:39:43 +00:00
Evan Cheng
576a27043d - PHI elimination also eliminates implicit_def that fits into a PHI node rather than copying it. 
- Be (slightly) smarter about where to place the copies.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49165 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:38:20 +00:00
Evan Cheng
8a50f1fcf0 Start of a series of patches related to implicit_def. 
There is no point in creating a long live range defined by an implicit_def. Scheduler now duplicates implicit_def instruction for each of its uses. Therefore, if an implicit_def node has multiple uses, it will become a number of very short live ranges, rather than a long one. This will make coalescer's job easier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49164 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:36:07 +00:00
Evan Cheng
6397c64441 Backing out 48222 temporarily. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49124 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 03:13:16 +00:00
Dale Johannesen
dedf502fba Make EH work with unnamed functions. Reenable running 
StripSymbols when EH is on.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49110 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 20:10:52 +00:00
Evan Cheng
ea1d9cdc4e Now that I am told MachineRegisterInfo also tracks physical register uses / defs, I can do away with the horribleness I introduced a while back. It's impossible to detect if there is any use of a physical register below an instruction (and before any def of the register) with some cheap book keeping. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49105 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 18:04:08 +00:00
Evan Cheng
1088317675 Remove #include<map> from LiveVariables.h. Not referenced. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49099 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 17:23:50 +00:00
Dale Johannesen
e00406281d Cosmetic changes per EH patch review feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49096 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 17:04:45 +00:00
Owen Anderson
52b1733df4 In some situations, we need to check for local interferences between the PHI 
node and its inputs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49070 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 03:00:13 +00:00
Owen Anderson
59df878391 Correctly mark a valno that was previous defined by a PHI node as having an 
unknown defining inst after PHI elimination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49069 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 02:12:45 +00:00
Dale Johannesen
1532f3ddd7 Recommitting EH patch; this should answer most of the 
review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49064 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 00:25:04 +00:00
Evan Cheng
3c75ba858b Re-materialization is for uses only. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49053 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 21:37:32 +00:00
Dale Johannesen
b6d5b14390 Revert 49006 for the moment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49046 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 20:00:57 +00:00
Owen Anderson
78216bc9f8 Don't dereference MBB->end(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49043 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 18:05:08 +00:00
Evan Cheng
9845eb5b03 More soft fp fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49016 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 02:18:22 +00:00
Evan Cheng
db45d1c649 Pasto. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49014 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 02:00:09 +00:00
Evan Cheng
6ad2f930da Add comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49013 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 01:51:26 +00:00
Evan Cheng
110cf48752 Unbreak ARM / Thumb soft FP support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49012 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 01:50:16 +00:00
Dale Johannesen
1544e4713b Emit exception handling info for functions which are 
not marked nounwind, or for all functions when -enable-eh
is set, provided the target supports Dwarf EH.

llvm-gcc generates nounwind in the right places; other FEs
will need to do so also.  Given such a FE, -enable-eh should
no longer be needed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49006 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 23:40:23 +00:00
Evan Cheng
427f4c106a It's not safe to fold a load from GV stub or constantpool into a two-address use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49002 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 23:19:51 +00:00
Evan Cheng
ca1267c02b Move reMaterialize() from TargetRegisterInfo to TargetInstrInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48995 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 20:40:39 +00:00
Dan Gohman
b061c4bc44 Fix a DAGCombiner optimization to respect volatile qualification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48994 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 20:32:52 +00:00
Evan Cheng
24d2f8a212 The support for remat of instructions with a register operand is hackish, to say the least. Since the register operand guaranteed to be PIC base and that it is already live at all uses, we are making sure it will not be spilled after its uses are rematerialized for both performance and correctness reasons. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48976 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 07:53:30 +00:00
Owen Anderson
bc91bd34f1 Fix a major bug in the DFS calculation. Thanks for Christopher Lamb for pointing this out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48973 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 01:39:20 +00:00
Chris Lattner
d27c991ceb Fix "Control reaches the end of non-void function" warnings, 
patch by David Chisnall.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48963 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-30 18:22:13 +00:00
Evan Cheng
fd5da6c991 Cosmetic changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48947 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 18:34:22 +00:00
Owen Anderson
c7c00361ce Remove some unneeded code for LiveInterval joining, and fix a bug in the Phi elimination algorithm where we were accidentally reasoning about 
the source rather than the destination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48936 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 01:58:47 +00:00
Chris Lattner
2a88a5c92f ifdef out a dead function. Should this be removed? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48916 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 15:36:27 +00:00
Duncan Sands
e10efce225 Rename getAnyLoad to getLoad is suggested by Evan. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48914 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 09:45:24 +00:00
Evan Cheng
02bee85a70 New entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48908 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 06:34:23 +00:00
Duncan Sands
14ea39cf3c Implement LegalizeTypes support for softfloat LOAD. 
In order to handle indexed nodes I had to introduce
a new constructor, and since I was there I factorized
the code in the various load constructors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48894 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 20:23:40 +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
Roman Levenstein
d7d3ea00c0 Fix spelling. Thanks, Duncan! :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48873 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 09:44:37 +00:00