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4965 Commits

Author SHA1 Message Date
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
Roman Levenstein
95d4184e72 Speed-up the SumOfUnscheduledPredsOfSuccs by introducing a new function 
called LimitedSumOfUnscheduledPredsOfSuccs. It terminates the computation
after a given treshold is reached. This new function is always faster, but
brings real wins only on bigger test-cases.

The old function SumOfUnscheduledPredsOfSuccs is left in-place for now and therefore a warning about an unused static function is produced.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48872 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 09:14:57 +00:00
Evan Cheng
7a963fa8ee Fix a memory bug: increment an iterator of a deleted machine instr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48853 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 01:27:25 +00:00
Dale Johannesen
d9ffd4cb92 Fix a bug in Darwin EH: FDE->CIE pointer must 
be relocatable.  Describe why .set is needed better.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48848 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 23:31:39 +00:00
Evan Cheng
0c28432852 One more coalescer fix wrt deadness propagation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48837 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 20:15:49 +00:00
Evan Cheng
ed70cbb3f3 Avoid commuting a def MI in order to coalesce a copy instruction away if any use of the same val# is a copy instruction that has already been coalesced. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48833 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 19:03:01 +00:00
Roman Levenstein
e326332acd Use a linked data structure for the uses lists of an SDNode, just like 
LLVM Value/Use does and MachineRegisterInfo/MachineOperand does.
This allows constant time for all uses list maintenance operations.

The idea was suggested by Chris. Reviewed by Evan and Dan.
Patch is tested and approved by Dan.

On normal use-cases compilation speed is not affected. On very big basic
blocks there are compilation speedups in the range of 15-20% or even better. 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48822 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 12:39:26 +00:00
Roman Levenstein
8dba9afd08 Fixed some spelling errors. Thanks, Duncan! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48819 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 11:23:38 +00:00
Roman Levenstein
e513ba4958 Some improvements related to the computation of isReachable. 
This fixes Bugzilla #1835 (http://llvm.org/bugs/show_bug.cgi?id=1835).
This patched is reviewed by Tanya and Dan. Dan tested and approved it.

The reason for the bad performance of the old algorithm is that it is very naive and scans every
time all nodes of the DAG in the worst case.

This patch introduces  a new algorithm based on the paper "Online algorithms
for maintaining the topological order of a directed acyclic graph" by
David J.Pearce and Paul H.J.Kelly. This is the MNR algorithm. It has a
linear time worst-case and performs much better in most situations.

The paper can be found here:
http://fano.ics.uci.edu/cites/Document/Online-algorithms-for-maintaining-the-topological-order-of-a-directed-acyclic-graph.html

The main idea of the new algorithm is to compute the topological ordering of the SNodes in the
DAG and to maintain it even after DAG modifications. The topological ordering allows for very fast 
node reachability checks. 

Tests on very big  input files with tens of thousands of instructions in a BB indicate huge 
speed-ups (up to 10x compilation time improvement) compared to the old version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48817 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 09:18:09 +00:00
Owen Anderson
d382f8a32d Dead PHI instructions need to be handled specially. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48811 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 03:03:23 +00:00
Owen Anderson
e4ded8937a Remove some debugging code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48803 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:26:43 +00:00
Owen Anderson
403dad6660 StrongPHIElimination doesn't support swapping live intervals like the coalescer does. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48802 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:25:27 +00:00
Dan Gohman
cfbb2f074d A quick nm audit turned up several fixed tables and objects that were 
marked read-write. Use const so that they can be allocated in a
read-only segment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48800 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 21:45:14 +00:00
Dan Gohman
62c7b8c371 Avoid outputing spaces at the ends of lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48797 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 21:38:12 +00:00
Devang Patel
73ee9c3fb1 Do not align loops if optimizing for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48794 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 21:03:02 +00:00
Evan Cheng
26471c48b3 Handle a special case xor undef, undef -> 0. Technically this should be transformed to undef. But this is such a common idiom (misuse) we are going to handle it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48792 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 20:08:07 +00:00
Dan Gohman
cffbd2562a Fix typos. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48779 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 17:10:29 +00:00
Evan Cheng
a2fb634def lastRegisterUse() should ignore identity copies. Those will be erased. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48759 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 02:02:19 +00:00
Evan Cheng
ea10046ebc Remove an unneeded test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48755 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-24 23:55:16 +00:00
Evan Cheng
6f83fc8afb If the coalescer commuted a def MI to allow coalescing, it can changed a previously coalesced copy into an non-identity copy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48752 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-24 23:31:21 +00:00
Evan Cheng
af8c563e11 Add an assertion to catch register of illegal class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48751 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-24 23:28:21 +00:00
Owen Anderson
9a31444ee6 Remove #include<iostream>, which I was using for debugging. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48739 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-24 20:36:47 +00:00
Dan Gohman
4c931fc6e2 APIntify SelectionDAG's EXTRACT_ELEMENT code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48726 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-24 16:38:05 +00:00
Owen Anderson
e46611e6bc Be sure to remove intervals after we've joined them. Also, remove some duplicated code. 
With this pass, StrongPHIElim can compile very simple testcases correctly.  There's still a ways
to go before it's ready for prime time, though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48719 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-24 04:11:27 +00:00
Anton Korobeynikov
c73ede0a9b Another comments fixing 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48683 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-22 07:53:40 +00:00
Evan Cheng
08b1173971 Teach DAG combiner to commute commutable binary nodes in order to achieve sdisel CSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48673 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-22 01:55:50 +00:00
Dan Gohman
c9235d2e85 Don't include <map> in Pass.h, which doesn't need it. This requires 
adding <map> to many files that actually do need it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48667 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-21 23:51:57 +00:00
Dan Gohman
4145bd509d Fix -view-sunit-dags to support cross-rc-copy nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48664 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-21 22:51:06 +00:00
Evan Cheng
70366b96a5 A couple of kill marker maintainence bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48653 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-21 19:09:30 +00:00
Duncan Sands
276dcbdc8d Introduce a new node for holding call argument 
flags.  This is needed by the new legalize types
infrastructure which wants to expand the 64 bit
constants previously used to hold the flags on
32 bit machines.  There are two functional changes:
(1) in LowerArguments, if a parameter has the zext
attribute set then that is marked in the flags;
before it was being ignored; (2) PPC had some bogus
code for handling two word arguments when using the
ELF 32 ABI, which was hard to convert because of
the bogusness.  As suggested by the original author
(Nicolas Geoffray), I've disabled it for the moment.
Tested with "make check" and the Ada ACATS testsuite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48640 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-21 09:14:45 +00:00
Christopher Lamb
b9b0428004 Check even more carefully before applying this DAGCombine transform. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48580 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-20 04:31:39 +00:00
Evan Cheng
260e07ec8c Fix this xform: (sra (shl X, m), result_size) -> (sign_extend (trunc (shl X, result_size - n - m))) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48578 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-20 02:18:41 +00:00
Chris Lattner
71a2cb25eb detabify llvm, patch by Mike Stump! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48577 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-20 01:22:40 +00:00
Christopher Lamb
15cbde3cf6 Fix X86's isTruncateFree to not claim that truncate to i1 is free. This fixes Bill's testcase that failed for r48491. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48542 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-19 08:30:06 +00:00
Evan Cheng
82a6d23700 Fixed a coalescer bug caused by a typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48526 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-19 02:26:36 +00:00
Evan Cheng
94202018c5 Fix live variables issues: 
1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue.
2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register:
   = EAX, AX<imp-use,kill>
...
AX =
In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48521 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-19 00:52:20 +00:00
Bill Wendling
2974e49019 Temporarily revert r48491. It's breaking test/CodeGen/X86/xorl.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48510 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-18 22:29:51 +00:00
Dale Johannesen
cf49819877 Make conversions of i8/i16 to ppcf128 work. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48493 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-18 17:28:38 +00:00
Christopher Lamb
981576c818 Target independent DAG transform to use truncate for field extraction + sign extend on targets where this is profitable. Passes nightly on x86-64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48491 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-18 16:46:39 +00:00
Evan Cheng
3c88d742d4 Rewrite code that propagate isDead information after a dead copy is coalesced. This remove some ugly spaghetti code and fixed a number of subtle bugs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48490 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-18 08:26:47 +00:00
Owen Anderson
755ebab37d A first attempt at updating live intervals, with code lifted from 
the coalescer.  This doesn't really work, but gets us farther than
before.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48446 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-17 06:08:26 +00:00
Christopher Lamb
c929823525 Make insert_subreg a two-address instruction, vastly simplifying LowerSubregs pass. Add a new TII, subreg_to_reg, which is like insert_subreg except that it takes an immediate implicit value to insert into rather than a register. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48412 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-16 03:12:01 +00:00
Evan Cheng
20ccded7de Remove isImplicitDef TargetInstrDesc flag. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48381 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-15 00:19:36 +00:00
Evan Cheng
da47e6e0d0 Replace all target specific implicit def instructions with a target independent one: TargetInstrInfo::IMPLICIT_DEF. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48380 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-15 00:03:38 +00:00
Duncan Sands
23a1d0c161 Do not generate special entries in the dwarf eh 
table for nounwind calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48373 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-14 21:36:24 +00:00
Evan Cheng
c17ba8a28d Fix PR2138. Apparently any modification to a std::multimap (including remove entries for a different key) can invalidate multimap iterators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48371 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-14 20:44:01 +00:00
Duncan Sands
d1ba3338d1 Simplify using getIntPtrConstant. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48355 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-14 05:23:57 +00:00
Nate Begeman
5922f561c6 Tabs -> spaces 
Use getIntPtrConstant in a couple places to shorten stuff up
Handle splitting vector shuffles with undefs in the mask


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48351 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-14 00:53:31 +00:00
Evan Cheng
db2d773fe6 Livein copy scheduling fixes: do not coalesce physical register copies, correctly determine the safe location to insert the copies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48348 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-14 00:14:55 +00:00
Dan Gohman
002e5d0a17 More APInt-ification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48344 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 22:13:53 +00:00
Evan Cheng
c438f35df9 Undo tweak. It had no obvious benefit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48341 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 17:42:48 +00:00
Evan Cheng
a2248682ae Typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48337 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 08:04:35 +00:00
Evan Cheng
0099ae2468 Don't try to sink 3-address instruction if convertToThreeAddress created more than one instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48336 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 07:56:58 +00:00
Evan Cheng
f3ff6992a3 Remove an unused command line option. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48334 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 06:38:28 +00:00
Evan Cheng
875357d213 TwoAddressInstructionPass enhancement. After it converts a two address instruction into a 3-address one, sink it past the instruction that kills the read-mod-write register if its definition is used past the kill. This reduces the number of live register by one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48333 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 06:37:55 +00:00
Christopher Lamb
6634e26aa1 Get rid of a pseudo instruction and replace it with subreg based operation on real instructions, ridding the asm printers of the hack used to do this previously. In the process, update LowerSubregs to be careful about eliminating copies that have side affects. 
Note: the coalescer will have to be careful about this too, when it starts coalescing insert_subreg nodes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48329 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 05:47:01 +00:00
Evan Cheng
1c9b8cf28c Remove unused options. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48319 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 02:41:34 +00:00
Evan Cheng
b27087f5aa Refactor some code out of MachineSink into a MachineInstr query. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48311 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-13 00:44:09 +00:00
Evan Cheng
9e23336d0c Experimental scheduler change to schedule / coalesce the copies added for function livein's. Take 2008-03-10-RegAllocInfLoop.ll, the schedule looks like this after these copies are inserted: 
entry: 0x12049d0, LLVM BB @0x1201fd0, ID#0:
Live Ins: %EAX %EDX %ECX
        %reg1031<def> = MOVPC32r 0
        %reg1032<def> = ADD32ri %reg1031, <es:_GLOBAL_OFFSET_TABLE_>, %EFLAGS<imp-def>
        %reg1028<def> = MOV32rr %EAX
        %reg1029<def> = MOV32rr %EDX
        %reg1030<def> = MOV32rr %ECX
        %reg1027<def> = MOV8rm %reg0, 1, %reg0, 0, Mem:LD(1,1) [0x1201910 + 0]
        %reg1025<def> = MOV32rr %reg1029
        %reg1026<def> = MOV32rr %reg1030
        %reg1024<def> = MOV32rr %reg1028

The copies unnecessarily increase register pressure and it will end up requiring a physical register to be spilled.

With -schedule-livein-copies:
entry: 0x12049d0, LLVM BB @0x1201fa0, ID#0:
Live Ins: %EAX %EDX %ECX
        %reg1031<def> = MOVPC32r 0
        %reg1032<def> = ADD32ri %reg1031, <es:_GLOBAL_OFFSET_TABLE_>, %EFLAGS<imp-def>
        %reg1024<def> = MOV32rr %EAX
        %reg1025<def> = MOV32rr %EDX
        %reg1026<def> = MOV32rr %ECX
        %reg1027<def> = MOV8rm %reg0, 1, %reg0, 0, Mem:LD(1,1) [0x12018e0 + 0]

Much better!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48307 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 22:19:41 +00:00
Duncan Sands
d8742eeb2f Initial soft-float support for LegalizeTypes. I rewrote 
the fcopysign expansion from LegalizeDAG to get rid of
what seems to be a bug: the use of sign extension means
that when copying the sign bit from an f32 to an f64,
the upper 32 bits of the f64 (now an i64) are set, not
just the top bit...  I also generalized it to work for
any sized floating point types, and removed the bogosity:
  SDOperand Mask1 = (SrcVT == MVT::f64)
    ? DAG.getConstantFP(BitsToDouble(1ULL << 63), SrcVT)
    : DAG.getConstantFP(BitsToFloat(1U << 31), SrcVT);
  Mask1 = DAG.getNode(ISD::BIT_CONVERT, SrcNVT, Mask1);
(here SrcNVT is an integer with the same size as SrcVT).
As far as I can see this takes a 1 << 63, converts to
a double, converts that to a floating point constant
then converts that to an integer constant, ending up
with... 1 << 63 as an integer constant!  So I just
generate this integer constant directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48305 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 21:27:04 +00:00
Dan Gohman
b576931ca2 Change VirtRegMap's dump to dump to cerr, not DOUT, so that it 
can be called from within a debuger without having -debug specified
on the command-line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48298 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 20:52:10 +00:00
Dan Gohman
39e33acf0a Fix typos in comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48297 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 20:50:04 +00:00
Duncan Sands
87a8615015 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48295 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 20:35:19 +00:00
Duncan Sands
25eb043759 Don't try to extract an i32 from an f64. This 
getCopyToParts problem was noticed by the new
LegalizeTypes infrastructure.  In order to avoid
this kind of thing in the future I've added a
check that EXTRACT_ELEMENT is only used with
integers.  Once LegalizeTypes is up and running
most likely BUILD_PAIR and EXTRACT_ELEMENT can
be removed, in favour of using apints instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48294 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 20:30:08 +00:00
Evan Cheng
c8e3b147ee Clean up my own mess. 
X86 lowering normalize vector 0 to v4i32. However DAGCombine can fold (sub x, x) -> 0 after legalization. It can create a zero vector of a type that's not expected (e.g. v8i16). We don't want to disable the optimization since leaving a (sub x, x) is really bad. Add isel patterns for other types of vector 0 to ensure correctness. It's highly unlikely to happen other than in bugpoint reduced test cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48279 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 07:02:50 +00:00
Owen Anderson
dfd07eab24 We also need to collect the VN IDs for the PHI instructions for later updating. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48278 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 04:22:57 +00:00
Owen Anderson
0031671b41 When we're determining what registers to coallesce, track the VNInfo IDs for the definitions that 
feed the PHI instructions.  We'll need these IDs in order to update LiveIntervals properly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48277 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 03:13:29 +00:00
Evan Cheng
0cec956d81 Total brain cramp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48274 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 02:05:05 +00:00
Evan Cheng
17d5f5496c Set NextMII after issuing a physical register spill. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48263 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 00:14:07 +00:00
Evan Cheng
4191b96f41 Minor debug output bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48261 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-12 00:02:46 +00:00
Anton Korobeynikov
4d86e2a6b8 Correctly propagate thread-local flag from aliasee to alias. This fixes PR2137 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48257 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 22:38:53 +00:00
Dan Gohman
bfae83139d Use PassManagerBase instead of FunctionPassManager for functions 
that merely add passes. This allows them to be used with either
FunctionPassManager or PassManager, or even with a custom new
kind of pass manager.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48256 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 22:29:46 +00:00
Anton Korobeynikov
22c9e65643 Honour aliases visibility during asm emission 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48249 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 21:41:14 +00:00
Evan Cheng
c1f53c7426 Transfer physical register spill info when load / store folding happens. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48246 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 21:34:46 +00:00
Dan Gohman
9736028d84 Use the correct value for InSignBit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48245 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 21:29:43 +00:00
Dan Gohman
ef5d194aaa Initial codegen support for functions and calls with multiple return values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48244 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 21:11:25 +00:00
Christopher Lamb
1fab4a6bbb Recommitting parts of r48130. These do not appear to cause the observed failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48223 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 10:09:17 +00:00
Evan Cheng
ea2378138f Use TargetRegisterInfo::getPhysicalRegisterRegClass. Remove duplicated code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48221 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 07:55:13 +00:00
Evan Cheng
676dd7c80b When the register allocator runs out of registers, spill a physical register around the def's and use's of the interval being allocated to make it possible for the interval to target a register and spill it right away and restore a register for uses. This likely generates terrible code but is before than aborting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48218 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 07:19:34 +00:00
Duncan Sands
ac7613a326 Some LegalizeTypes code factorization and minor 
enhancements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48215 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 06:41:14 +00:00
Chris Lattner
5d03f21744 compile: double test() {} 
into:

_test:
	fldz
	ret

instead of:

_test:
	subl	$12, %esp
	#IMPLICIT_DEF %xmm0
	movsd	%xmm0, (%esp)
	fldl	(%esp)
	addl	$12, %esp
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48213 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-11 06:21:08 +00:00