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Author SHA1 Message Date
Chris Lattner
a19cea061e add a todo for something I noticed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23679 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 22:59:08 +00:00
Chris Lattner
ee899e6bfc (X & Y) & C == 0 if either X&C or Y&C are zero 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23678 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 22:12:36 +00:00
Chris Lattner
5fb0deb43a Make MaskedValueIsZero a bit more aggressive 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23677 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 22:08:50 +00:00
Andrew Lenharth
fa08fb2c78 This seems useful from the original patch that added the function. If there is a reason it is not useful on a RISC type target, let me know and I will pull it out 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23676 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 20:11:35 +00:00
Chris Lattner
60de63d0b6 Fix funky xcode indentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23674 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 06:36:35 +00:00
Chris Lattner
a18af06360 Hrm, you didn't see this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23673 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 06:24:02 +00:00
Chris Lattner
7305ae28df Fix a source of non-determinism in the backend: the order of processing 
IV strides dependend on the pointer order of the strides in memory.
Non-determinism is bad.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23672 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 06:20:55 +00:00
Chris Lattner
089c25ccb3 When emiting a CopyFromReg and the source is already a vreg, do not bother 
creating a new vreg and inserting a copy: just use the input vreg directly.

This speeds up the compile (e.g. about 5% on mesa with a debug build of llc)
by not adding a bunch of copies and vregs to be coallesced away.  On mesa,
for example, this reduces the number of intervals from 168601 to 129040
going into the coallescer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23671 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 05:58:56 +00:00
Chris Lattner
65a419a104 Disable formation of rlwinm instructions from SRA bases. This fixes 
the 177.mesa failure from last night, and fixes the
CodeGen/PowerPC/2005-10-08-ArithmeticRotate.ll regression test I added.
If this code cannot be fixed, it should be removed for good, but I'll leave
it to Nate to decide its fate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23670 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 05:36:17 +00:00
Nate Begeman
7d47a61496 Remove another unused file. Preparing for the great "enable i64 on ppc32" 
merge, and using subtarget info for ptr size.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23668 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-08 01:32:34 +00:00
Nate Begeman
02f77d1e83 Remove a file that is no longer used 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23666 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-08 01:21:27 +00:00
Nate Begeman
f845b4563a Lo and behold, the last bits of SelectionDAG.cpp have been moved over. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23665 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-08 00:29:44 +00:00
Chris Lattner
cf01a70550 When preselecting, favor things that have low depth to select first. This 
is faster and uses less stack space.  This reduces our stack requirement
enough to compile sixtrack, and though it's a hack, should be enough until
we switch to iterative isel


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23664 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 22:10:27 +00:00
Chris Lattner
9a9719eea1 remove debugging code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23663 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 15:31:26 +00:00
Chris Lattner
c4ced268d8 implement CodeGen/PowerPC/div-2.ll:test2-4 by propagating zero bits through 
C-X's


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23662 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 15:30:32 +00:00
Chris Lattner
6c4dad0b8b fix indentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23660 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 06:37:02 +00:00
Chris Lattner
094c8fcd14 Turn sdivs into udivs when we can prove the sign bits are clear. This 
implements CodeGen/PowerPC/div-2.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23659 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 06:10:46 +00:00
Jeff Cohen
68d98e0bdc Remove useless variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23656 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 05:28:29 +00:00
Chris Lattner
71abaab1d2 add a hack to work around broken VC++ scoping rules. Thx to JeffC for pointing 
this out to me


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23655 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 05:23:36 +00:00
Chris Lattner
eb5d47d99d Fix a CQ regression from my patch to split F32/F64 into seperate register 
classes on PPC.  We were emitting fmr instructions to do fp extensions, which
weren't getting coallesced.  This fixes Regression/CodeGen/PowerPC/fpcopy.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23654 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 05:00:52 +00:00
Chris Lattner
7a7c979ddd Fix CodeGen/Generic/bool-to-double.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23652 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 04:50:48 +00:00
Chris Lattner
6a16f6a14f Pull out Call, reducing stack frame size from 6032 bytes to 5184 bytes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23650 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 19:07:45 +00:00
Chris Lattner
222adac30a Pull out setcc, this reduces stack frame size from 7520 to 6032 bytes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23649 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 19:03:35 +00:00
Chris Lattner
2b63e4c5e2 Pull two more methods out, reducing stack frame size from 8224 -> 7520 bytes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23648 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 18:56:10 +00:00
Chris Lattner
bd937b98f4 Add a recursive-iterative hybrid stage to attempt to reduce stack space, this 
helps but not enough.

Start pulling cases out of PPC32DAGToDAGISel::Select.  With GCC 4, this function
required 8512 bytes of stack space for each invocation (GCC 3 required less
than 700 bytes).  Pulling this first function out gets us down to 8224.  More
to come :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23647 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 18:45:51 +00:00
Chris Lattner
cf5c79b34f silence a bogus GCC warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23646 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 17:39:10 +00:00
Chris Lattner
8a61a7524a Fix the LLC regressions on X86 last night. In particular, when undoing 
previous copy elisions and we discover we need to reload a register, make
sure to use the regclass of the original register for the reload, not the
class of the current register.  This avoid using 16-bit loads to reload 32-bit
values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23645 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 17:19:06 +00:00
Andrew Lenharth
f3fb71bfd7 This is suppose to work now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23644 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 16:54:29 +00:00
Andrew Lenharth
d5613debf9 remove VAX compatibility instruction, we will never use this 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23643 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 16:53:32 +00:00
Chris Lattner
32fca00a23 Make the legalizer completely non-recursive 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23642 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-06 01:20:27 +00:00
Nate Begeman
0558f61b0c Let the combiner handle more cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23641 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 21:44:43 +00:00
Nate Begeman
829cb81806 Remove some bad code from Legalize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23640 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 21:44:10 +00:00
Nate Begeman
e17daebb30 Check in some more DAGCombiner pieces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23639 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 21:43:42 +00:00
Chris Lattner
22480c4350 Fix a bug in the local spiller, where we could take code like this: 
store r12 -> [ss#2]
  R3 = load [ss#1]
  use R3
  R3 = load [ss#2]
  R4 = load [ss#1]

and turn it into this code:

  store R12 -> [ss#2]
  R3 = load [ss#1]
  use R3
  R3 = R12
  R4 = R3    <- oops!

The problem was that promoting R3 = load[ss#2] to a copy missed the fact that
the instruction invalidated R3 at that point.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23638 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 18:30:19 +00:00
Chris Lattner
f5c6e6b745 silence some warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23637 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 17:15:09 +00:00
Chris Lattner
3ea0b47f81 implement visitBR_CC so that PowerPC/inverted-bool-compares.ll passes 
with the dag combiner.  This speeds up espresso by 8%, reaching performance
parity with the dag-combiner-disabled llc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23636 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:47:48 +00:00
Chris Lattner
ad13715ed4 fix some pastos 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23635 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:37:22 +00:00
Chris Lattner
9503859c54 Add a new HandleNode class, which is used to handle (haha) cases in the 
dead node elim and dag combiner passes where the root is potentially updated.
This fixes a fixme in the dag combiner.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23634 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:35:28 +00:00
Chris Lattner
5c46f74ec7 Implement the code for PowerPC/inverted-bool-compares.ll, even though it 
that testcase still does not pass with the dag combiner.  This is because
not all forms of br* are folded yet.

Also, when we combine a node into another one, delete the node immediately
instead of waiting for the node to potentially come up in the future.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23632 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:11:08 +00:00
Chris Lattner
d48050aa15 make sure that -view-isel-dags is the input to the isel, not the input to 
the second phase of dag combining


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23631 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:09:10 +00:00
Chris Lattner
91559026d3 Fix a crash compiling Olden/tsp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23630 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 04:45:43 +00:00
Chris Lattner
a1e3f54396 refactor a bit of code. 
When moving constant entries in 'Map' if the entry is the representative
constant for the abstractypemap, make sure to update it as well.  This
fixes the bcreader failures from last night on several C++ apps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23628 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 21:35:50 +00:00
Chris Lattner
23ec01fcc3 Minor speedup to avoid array searches given a Use*. This speeds up bc reading 
of the python test from 1:00 to 54s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23627 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 18:47:09 +00:00
Chris Lattner
d0ff1adbdb Change the signature of replaceUsesOfWithOnConstant. The bool was always 
true dynamically.  Finally, pass the Use* that replaceAllUsesWith has into
the method for future use.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23626 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 18:13:04 +00:00
Chris Lattner
a55b30a225 For large constants (e.g. arrays and structs with many elements) just 
creating the keys and doing comparisons to index into 'Map' takes a lot
of time.  For these large constants, keep an inverse map so that 'remove'
and move operations are much faster.

This speeds up a release build of the bc reader on Eric's nasty python
bytecode file from 1:39 to 1:00s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23624 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 17:48:46 +00:00
Chris Lattner
d7a3fc6819 minor cleanup/fastpath for the bcreader. This speeds up the bcreader 
from 1:41 -> 1:39 on the large python .bc file in a release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23623 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 16:52:46 +00:00
Jim Laskey
9d528dc2b4 Reverting to version - until problem isolated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23622 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 16:41:51 +00:00
Chris Lattner
ccc8ed7bb5 Add a forward def 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23621 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 05:09:20 +00:00
Nate Begeman
1aa1972c63 Fix some faulty logic in the libcall inserter. 
Since calls return more than one value, don't bail if one of their uses
happens to be a node that's not an MVT::Other when following the chain
from CALLSEQ_START to CALLSEQ_END.

Once we've found a CALLSEQ_START, we can just return; there's no need to
tail-recurse further up the graph.

Most importantly, just because something only has one use doesn't mean we
should use it's one use to follow from start to end.  This faulty logic
caused us to follow a chain of one-use FP operations back to a much earlier
call, putting a cycle in the graph from a later start to an earlier end.

This is a better fix that reverting to the workaround committed earlier
today.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23620 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 02:10:55 +00:00
Chris Lattner
c182a88aec implement the struct version of the array speedup, speeding up the 
testcase a bit more from 1:48 -> 1.40.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23619 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 01:17:50 +00:00
Chris Lattner
ab55698349 Fix DemoteRegToStack on an invoke. This fixes PR634. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23618 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 00:44:01 +00:00
Nate Begeman
27d404ccd1 Add back a workaround that fixes some breakages from chris's last change. 
Neither of us have yet figured out why this code is necessary, but stuff
breaks if its not there.  Still tracking this down...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23617 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-04 00:37:37 +00:00
Chris Lattner
7a66e686fe Clean up the code a bit. Use isInstructionTriviallyDead to be more aggressive 
and more correct than use_empty().  This fixes PR635 and
SimplifyCFG/2005-10-02-InvokeSimplify.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23616 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 23:43:43 +00:00
Chris Lattner
cea141f1d1 Change ConstantArray::replaceUsesOfWithOnConstant to attempt to update 
constant arrays in place instead of reallocating them and replaceAllUsesOf'ing
the result.  This speeds up a release build of the bcreader from:

136.987u 120.866s 4:24.38
to
49.790u 49.890s 1:40.14

... a 2.6x speedup parsing a large python bc file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23614 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 22:51:37 +00:00
Chris Lattner
5cbade9f83 move some methods, no other changes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23613 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 21:58:36 +00:00
Chris Lattner
dfdd6c5d7a minor microoptimizations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23612 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 21:56:24 +00:00
Chris Lattner
eebac5fee6 Use a map to cache the ModuleType information, so we can do logarithmic 
lookups instead of linear time lookups.  This speeds up bc parsing of a
large file from

137.834u 118.256s 4:27.96
to
132.611u 114.436s 4:08.53

with a release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23611 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 21:26:53 +00:00
Jim Laskey
8ba732bb1c Refactor gathering node info and emission. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23610 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 12:30:32 +00:00
Chris Lattner
6db0756f02 clean up this code a bit, no functionality change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23609 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 07:22:07 +00:00
Chris Lattner
8ca02914e5 Speed up the asm printer a lot by not printing formatted LLVM asm output 
for globals


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23608 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 07:08:36 +00:00
Chris Lattner
53a79aaae9 Break the body of the loop out into a new method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23606 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 04:47:08 +00:00
Chris Lattner
5e8ca66914 Make IVUseShouldUsePostIncValue more aggressive when the use is a PHI. In 
particular, it should realize that phi's use their values in the pred block
not the phi block itself.  This change turns our em3d loop from this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_6    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; endif.loopexit.loopexit_crit_edge
        addi r3, r2, 1
        blr
LBB_test_6:     ; loopexit
        or r3, r2, r2
        blr

into:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r6, r6
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        or r2, r6, r6
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r2, r2
        blr


Unfortunately, this is actually worse code, because the register coallescer
is getting confused somehow.  If it were doing its job right, it could turn the
code into this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r6, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r6, r6
        blr

... which I'll work on next. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23604 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 02:50:05 +00:00
Chris Lattner
0ae33eb243 Refactor some code into a function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23603 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 01:04:44 +00:00
Chris Lattner
1902ff4d82 This break is bogus and I have no idea why it was there. Basically it prevents 
memoizing code when IV's are used by phinodes outside of loops.  In a simple
example, we were getting this code before (note that r6 and r7 are isomorphic
IV's):

        li r6, 0
        or r7, r6, r6
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r7, r7
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r2, r7, 1
        addi r7, r7, 1
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

Now we get:

        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

this was noticed in em3d.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23602 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 00:37:33 +00:00
Chris Lattner
37edbf0b21 when checking if we should move a split edge block outside of a loop, 
check the presplit pred, not the post-split pred.  This was causing us
to make the wrong decision in some cases, leaving the critical edge block
in the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23601 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 00:31:52 +00:00
Chris Lattner
ab510a76d6 Fix a problem where the legalizer would run out of stack space on extremely 
large basic blocks because it was purely recursive.  This switches it to an
iterative/recursive hybrid.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23596 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 17:49:46 +00:00
Chris Lattner
dcd5abc70c silence a bogus warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23595 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 16:30:51 +00:00
Chris Lattner
3cf8760dc5 silence some warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23594 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 16:29:36 +00:00
Chris Lattner
123557fcf0 silence a warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23593 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 16:27:59 +00:00
Chris Lattner
dff06f4348 add patterns for float binops and fma ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23592 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 07:46:28 +00:00
Chris Lattner
080a4b1637 Sort the cpu and features table, so that the alpha backend doesn't fail EVERY 
compile with an assertion that the tables are not sorted!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23591 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 07:13:52 +00:00
Chris Lattner
a3638c0f1f Add assertions to the trivial scheduler to check that the value types match 
up between defs and uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23590 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 07:10:55 +00:00
Chris Lattner
43f07a4bbc another solution to the fsel issue. Instead of having 4 variants, just force 
the comparison to be 64-bits.  This is fine because extensions from float
to double are free.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23589 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 07:07:49 +00:00
Chris Lattner
867940d1b7 fsel can take a different FP type for the comparison and for the result. As such 
split the FSEL family into 4 things instead of just two.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23588 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 06:58:23 +00:00
Chris Lattner
7c0d664c21 fix an f32/f64 type mismatch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23587 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 06:37:13 +00:00
Chris Lattner
14765be0bc Codegen CopyFromReg using the regclass that matches the valuetype of the 
destination vreg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23586 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 06:34:16 +00:00
Chris Lattner
a916dd8888 Adjust to change in ctor 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23585 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 06:23:51 +00:00
Chris Lattner
ca0a4778a8 Minor tweak to the branch selector. When emitting a two-way branch, and if 
we're in a single-mbb loop, make sure to emit the backwards branch as the
conditional branch instead of the uncond branch.  For example, emit this:

LBBl29_z__44:
        stw r9, 0(r15)
        stw r9, 4(r15)
        stw r9, 8(r15)
        stw r9, 12(r15)
        addi r15, r15, 16
        addi r8, r8, 1
        cmpw cr0, r8, r28
        ble cr0, LBBl29_z__44
        b LBBl29_z__48                   *** NOT PART OF LOOP

Instead of:

LBBl29_z__44:
        stw r9, 0(r15)
        stw r9, 4(r15)
        stw r9, 8(r15)
        stw r9, 12(r15)
        addi r15, r15, 16
        addi r8, r8, 1
        cmpw cr0, r8, r28
        bgt cr0, LBBl29_z__48            *** PART OF LOOP!
        b LBBl29_z__44

The former sequence has one fewer dispatch group for the loop body.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23582 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 23:06:26 +00:00
Chris Lattner
b91956e7f8 like the comment says, enable this 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23581 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 23:02:40 +00:00
Chris Lattner
505277a7f5 Add some very paranoid checking for operand/result reg class matchup 
For instructions that define multiple results, use the right regclass
to define the result, not always the rc of result #0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23580 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 07:45:09 +00:00
Jeff Cohen
2aeaf4e839 Fix VC++ warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23579 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 03:57:14 +00:00
Chris Lattner
2c1760f636 fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23578 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 02:51:36 +00:00
Chris Lattner
919c032fa4 Modify the ppc backend to use two register classes for FP: F8RC and F4RC. 
These are used to represent float and double values, and the two regclasses
contain the same physical registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23577 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 01:35:02 +00:00
Chris Lattner
37345fe3cd add a method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23575 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 00:17:07 +00:00
Jim Laskey
22f6212e9f typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23574 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 00:08:23 +00:00
Jim Laskey
41755e2c7e 1. Simplify the gathering of node groups. 
2. Printing node groups when displaying nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23573 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-01 00:03:07 +00:00
Jim Laskey
242f2557cc Should be using flag and not chain. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23572 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 23:43:37 +00:00
Nate Begeman
2b5e66fc6e Remove some now-dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23571 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 21:28:27 +00:00
Andrew Lenharth
ac35cd207f subtarget support for CIX and FIX extentions (the only 2 I care about right now) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23569 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 20:24:38 +00:00
Jim Laskey
b6d4c2cf2d 1. Made things node-centric (from operand). 
2. Added node groups to handle flagged nodes.

3. Started weaning simple scheduling off existing emitter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23566 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 19:15:27 +00:00
Chris Lattner
0f21fd5204 Rename MRegisterDesc -> TargetRegisterDesc for consistency 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23564 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:49:27 +00:00
Chris Lattner
863914feb5 trim down the target info structs now that we have a preferred spill register class for each callee save register 
Why is V9 maintaining these tables manually? ugh!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23561 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:38:36 +00:00
Chris Lattner
8fb040e584 now that we have a reg class to spill with, get this info from the regclass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:19:22 +00:00
Chris Lattner
5802be13e0 constant fold these calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23558 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:16:59 +00:00
Chris Lattner
56bcae0de9 simplify this code using the new regclass info passed in 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23557 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:12:38 +00:00
Chris Lattner
80a4f169b4 Now that we have getCalleeSaveRegClasses() info, use it to pass the register 
class into the spill/reload methods.  Targets can now rely on that argument.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23556 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 16:59:07 +00:00
Chris Lattner
e4047188e7 stub out a virtual method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23554 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 06:55:18 +00:00
Chris Lattner
d174fe0ec3 CR registers are not used by this "target" 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23552 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 06:43:58 +00:00
Chris Lattner
0a37960d32 these registers don't belong to any register classes, so don't mark them 
as callee save.  They can never be generated by the compiler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23551 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 06:42:24 +00:00
Chris Lattner
ef242b1ccc Now that self referential classes are supported, get rid of a work-around. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23544 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 04:13:23 +00:00
Chris Lattner
b48d2cf5eb pass extra args 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23539 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:31:52 +00:00
Chris Lattner
0ffb1a56ff these methods get extra args 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23538 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:30:55 +00:00
Chris Lattner
97d5e6461a Pass extra regclasses into spilling code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23537 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:29:42 +00:00
Chris Lattner
bf9716b9c4 Change this code ot pass register classes into the stack slot spiller/reloader 
code.  PrologEpilogInserter hasn't been updated yet though, so targets cannot
use this info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23536 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:29:00 +00:00
Chris Lattner
ff201eebea Use the 32-bit version for now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23534 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 00:05:05 +00:00
Chris Lattner
67ab118a6d Add a bunch of patterns for F64 FP ops, add some more integer ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23533 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 23:34:24 +00:00
Chris Lattner
237733e933 Remove code for patterns that are autogenerated 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23532 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 23:33:31 +00:00
Andrew Lenharth
120ab480ab begining alpha subtarget support 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23531 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 22:54:56 +00:00
Chris Lattner
c7a37a52cd tblgen autogens this pattern now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23530 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 22:37:24 +00:00
Andrew Lenharth
68fd4866de copy and paste error 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23528 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 21:11:57 +00:00
Chris Lattner
221e53caea now that tblgen is smarter, this pattern is not needed. Also, tblgen 
now inverts commuted versions of ANDC/ORC with the current .td file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23527 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 19:29:15 +00:00
Chris Lattner
93e50ce04c Insert stores after phi nodes in the normal dest. This fixes 
LowerInvoke/2005-08-03-InvokeWithPHI.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23525 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 17:44:20 +00:00
Chris Lattner
52897f827e consistency with other cases, no functionality change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23524 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 17:38:52 +00:00
Chris Lattner
f13befb456 Make the JIT default to the DAG isel instead of the pattern isel, like LLC. 
The Pattern isel has some strange memory corruption issues going on. :(

This should have been converted over anyway, but it got forgotten somehow
when switching to the dag isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23523 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 17:31:03 +00:00
Chris Lattner
473a99073c Fix two bugs in my patch earlier today that broke int->fp conversion on X86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23522 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 06:44:39 +00:00
Chris Lattner
a48bc53cad Fold isascii into a simple comparison. This speeds up 197.parser by 7.4%, 
bringing the LLC time down to the CBE time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23521 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 06:17:27 +00:00
Chris Lattner
e9b6242780 remove a bunch of unneeded stuff, or self evident comments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23519 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 06:16:11 +00:00
Chris Lattner
c330069e20 Implement a couple of memcmp folds from the todo list 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23517 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 04:54:20 +00:00
Jeff Cohen
fef80f43e0 Silence VC++ redeclaration warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23516 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 01:59:49 +00:00
Chris Lattner
d3d2cf52bb Never rely on ReplaceAllUsesWith when selecting, use CodeGenMap instead. 
ReplaceAllUsesWith does not replace scalars SDOperand floating around on
the stack, permitting things to be selected multiple times.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23515 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 00:59:32 +00:00
Chris Lattner
79d0e9f3d1 Codegen ADD X, IMM -> addis/addi if needed. 
This implements PowerPC/fold-li.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23514 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 23:07:13 +00:00
Chris Lattner
d8ead9e250 Autogen MUL, move FP cases together 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23512 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:53:16 +00:00
Chris Lattner
88add100b3 disentangle FP from INT versions of div/mul 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23511 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:50:24 +00:00
Chris Lattner
4a7de219b4 Use the autogenerated matcher for ADD/SUB 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23510 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:47:28 +00:00
Chris Lattner
e025574370 add a patter for SUBFIC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23509 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:47:06 +00:00
Chris Lattner
0648ccf1e9 Mark int binops as int-only, add FP binops. Mark FADD/FMUL as commutative but 
not associative.  Add [SU]REM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23508 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:38:27 +00:00
Chris Lattner
bed21de39b wrap a long line 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23507 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:30:58 +00:00
Chris Lattner
615c2d0920 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23506 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:29:58 +00:00
Chris Lattner
3e2bafd640 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23505 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:29:17 +00:00
Chris Lattner
01b3d73c20 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23504 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:28:18 +00:00
Chris Lattner
a5cac6f6eb Mark associative nodes as associative 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23503 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 20:58:39 +00:00
Chris Lattner
645992f595 Nate pointed out that mulh[us] are commutative as well. Thanks! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23500 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 19:01:44 +00:00
Chris Lattner
6bcf1b7eed expose commutativity information 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23498 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:27:58 +00:00
Chris Lattner
393e138f60 All (xor *) cases are autogenerated now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23497 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:12:37 +00:00
Chris Lattner
cfc828a3d0 add support for missed eqv tests 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23496 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:10:51 +00:00
Chris Lattner
1bd8b7b06e Implement PowerPC/eqv-andc-orc-nor.ll:EQV3 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23494 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:04:52 +00:00
Chris Lattner
91da8623be learn to codegen not as NOR instead of xoris/xori 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23490 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 17:13:15 +00:00
Chris Lattner
d135fa4fd6 These nodes are all autogenerated 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23489 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 17:07:09 +00:00
Chris Lattner
32643d8e05 Constant fold llvm.sqrt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23487 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 01:34:32 +00:00
Chris Lattner
5b3c70263b add a note about a way to improve this code further, that I won't be getting 
to right now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23485 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:44:59 +00:00
Chris Lattner
9a5582f251 Fix a regression in my previous patch, fixing GlobalOpt/2005-09-27-Crash.ll 
and PR632.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23484 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:28:11 +00:00
Chris Lattner
d145a61f8f Darwin, like many BSD systems, has a setjmp/longjmp which saves the signal mask 
on setjmp calls and restores it on longjmp calls (both of which require syscalls).

This makes the calls REALLY slow.  Use _setjmp/_longjmp instead.  This speeds up
hexxagon from 120.31s to 15.68s: from 5.53x slower than GCC to 28% faster than GCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23482 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:18:25 +00:00
Chris Lattner
6c38b33613 If the target prefers it, use _setjmp/_longjmp should be used instead of setjmp/longjmp for llvm.setjmp/llvm.longjmp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23481 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:15:53 +00:00
Chris Lattner
8e6be8b921 initialize new flag 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23480 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:13:56 +00:00
Chris Lattner
4531371960 Avoid spilling stack slots... to stack slots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23478 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:33:12 +00:00
Chris Lattner
f4e6c3a69b Completely rewrite 'correct' eh support. This changes how setjmp insertion 
is performed so it is only at most once per function that contains an invoke
instead of once per invoke in the function.  This patch has the following perks:

1. It fixes PR631, which complains about slowness.
2. If fixes PR240, which complains about non-volatile vars being live across
   setjmp/longjmps.
3. It improves (but does not fix) the jmpbuf alignment issue on itanium by not
   forcing the jmpbufs to always be 8-bytes off the alignment of the structure.
4. It speeds up 253.perlbmk from 338s to 13.70s (a 25x improvement!), making us
   now about 4% faster than GCC.

Further improvements are also possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23477 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:18:17 +00:00
Chris Lattner
fe15830f96 Make the pass name simpler 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23476 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:10:32 +00:00
Chris Lattner
b94388a76a fix CBackend/2005-09-27-VolatileFuncPtr.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23475 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 20:52:44 +00:00
Chris Lattner
6d7277b3b4 allow demotion to volatile values, add support for invoke 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23473 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 19:39:00 +00:00
Chris Lattner
333bd835bd Make sure to clear the CodeGenMap after each basic block is selected to avoid 
cross MBB pollution.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23470 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 17:45:33 +00:00
Jim Laskey
5324fec644 Remove some redundancies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23469 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 17:32:45 +00:00
Chris Lattner
df0ef1d0fe Split SimpleConstantVal up into its components, so each Constant subclass getsa different enum value. This allows 'classof' for these to be really simple,not needing to call getType() anymore. 
This speeds up isa/dyncast/etc for constants, and also makes them smaller.
For example, the text section of a release build of InstCombine.cpp shrinks
from 230037 bytes to 216363 bytes, a 6% reduction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23467 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 06:09:08 +00:00
Chris Lattner
a9ec8ab32b Add support for external calls that we know how to constant fold. This implements 
ctor-list-opt.ll:CTOR8


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23465 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 05:02:43 +00:00
Chris Lattner
231308c545 Fix a bug where we would evaluate stores into linkonce objects which could be 
potentially replaced at link-time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23463 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 04:50:03 +00:00
Chris Lattner
cd27142cc8 Implement support for static constructors with calls in them. This is useful 
because gccas runs globalopt before inlining.

This implements ctor-list-opt.ll:CTOR7


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23462 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 04:45:34 +00:00
Chris Lattner
8a7cc6e71c Refactor this code a bit, no functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23460 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 04:27:01 +00:00
Chris Lattner
5e8d2dc197 Move the post-lsr simplify cfg pass after lowereh, so it can clean up after 
eh lowering as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23459 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 00:14:41 +00:00
Chris Lattner
30e21a46f0 minor pattern shuffling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23458 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 22:20:16 +00:00
Jim Laskey
e6b90fba4a Addition of a simple two pass scheduler. This version is currently hacked up 
for testing and will require target machine info to do a proper scheduling.
The simple scheduler can be turned on using -sched=simple (defaults
to -sched=none)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23455 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 21:57:04 +00:00
Chris Lattner
ff0c1ef9eb Remove some dead code. ctor evaluation subsumes empty ctor elim 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23453 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 20:38:20 +00:00
Chris Lattner
a22fdb0a37 Add support for alloca, implementing ctor-list-opt.ll:CTOR6 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23452 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 17:07:09 +00:00
Chris Lattner
aae4a1cd3f Add a debug printout, fix a crash on kc++ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23450 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 07:34:35 +00:00
Chris Lattner
798b4d5bb3 Implement loads/stores through GEP's of globals. This implements 
ctor-list-opt.ll:CTOR5.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23449 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 06:52:44 +00:00
Chris Lattner
0b142e3920 Replace TraverseGEPInitializer with ConstantFoldLoadThroughGEPConstantExpr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23447 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:34:07 +00:00
Chris Lattner
ebe61201d1 Eliminate GetGEPGlobalInitializer in favor of the more powerful 
ConstantFoldLoadThroughGEPConstantExpr function in the utils lib.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23446 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:28:52 +00:00
Chris Lattner
363f2a26d5 Factor the GetGEPGlobalInitializer out of this pass and into Transforms/Utils 
as ConstantFoldLoadThroughGEPConstantExpr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23445 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:28:06 +00:00
Chris Lattner
c5f52e6da1 Move the ConstantFoldLoadThroughGEPConstantExpr function out of the InstCombine 
pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23444 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:27:10 +00:00
Chris Lattner
562a055ca7 add a comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23442 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:16:34 +00:00
Chris Lattner
04de1cfb2b Add support for getelementptr, load, and correctly reject volatile stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23441 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:15:37 +00:00
Chris Lattner
cdf98bed96 Add support for br/brcond/switch and phi 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23439 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 04:57:38 +00:00
Chris Lattner
79c1101947 Add a simple interpreter to this code, allowing us to statically evaluate 
global ctors that are simple enough.  This implements ctor-list-opt.ll:CTOR2.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23437 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 04:44:35 +00:00
Chris Lattner
db973e60ce factor some code into a InstallGlobalCtors method, add comments. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23435 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 02:31:18 +00:00
Chris Lattner
7d8e58f384 Make the global opt optimizer work on modules with a null terminator, by 
accepting the null even with a non-65535 init prio


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23434 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 02:19:27 +00:00
Chris Lattner
b1ab458047 Factor this code out into a few methods. 
Implement the start of global ctor optimization.  It is currently smart
enough to remove the global ctor for cases like this:

struct foo {
  foo() {}
} x;

... saving a bit of startup time for the program.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23433 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 01:43:45 +00:00
Chris Lattner
aebac50e77 Fix some logic I broke that caused a regression on 
SimplifyLibCalls/2005-05-20-sprintf-crash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23430 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-25 07:06:48 +00:00
Chris Lattner
5931c54e85 Move MaskedValueIsZero up. 
Match a bunch of idioms for sign extensions, implementing InstCombine/signext.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23428 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 23:43:33 +00:00
Chris Lattner
5d735bf29b Simplify this code a bit by relying on recursive simplification. Support 
sprintf("%s", P)'s that have uses.

s/hasNUses(0)/use_empty()/


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23425 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 22:17:06 +00:00
Chris Lattner
5b845c9443 Add support for a marker byte that indicates that we shouldn't add the user 
prefix to a symbol name


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23421 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 08:24:28 +00:00
Chris Lattner
ea874f3306 Teach the dag isel generator how to construct arbitrary immediates. The 
generated isel now tries li then lis, then lis+ori.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23418 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 00:41:58 +00:00
Chris Lattner
b60e0815df remove some debugging code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23411 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 18:49:09 +00:00
Chris Lattner
263d1e469d Fold two consequtive branches that share a common destination between them. 
This implements SimplifyCFG/branch-fold.ll, and is useful on ?:/min/max heavy
code


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23410 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 18:47:20 +00:00
Chris Lattner
055dc102e9 simplify some logic further 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23408 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 07:23:18 +00:00
Chris Lattner
f58c1a578e pull a bunch of logic out of SimplifyCFG into a helper fn 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23407 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 06:39:30 +00:00
Chris Lattner
7c439929bc speed up Archive::isBytecodeArchive in the case when the archive doesn't have 
an llvm-ranlib symtab.  This speeds up gccld -native on an almost empty .o file
from 1.63s to 0.18s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23406 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 06:22:58 +00:00
Chris Lattner
5ae7911b24 Turn (X^C1) == C2 into X == C1^C2 iff X&~C1 = 0 (and move a function) 
This happens all the time on PPC for bool values, e.g. eliminating a xori
in inverted-bool-compares.ll.

This should be added to the dag combiner as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23403 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 00:55:52 +00:00
Chris Lattner
3c3fe462f7 Expose the LiveInterval interfaces as public headers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23400 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-21 04:19:09 +00:00
Chris Lattner
e9487f0dc8 Start threading across blocks with code in them, so long as the code does 
not define a value that is used outside of it's block.  This catches many
more simplifications, e.g. 854 in 176.gcc, 137 in vpr, etc.

This implements branch-phi-thread.ll:test3.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23397 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-20 01:48:40 +00:00
Chris Lattner
2e42e36698 Implement merging of blocks with the same condition if the block has multiple 
predecessors.  This implements branch-phi-thread.ll::test1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23395 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-20 00:43:16 +00:00
Chris Lattner
9c88d98162 Reject a case we don't handle yet 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23393 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 23:57:04 +00:00
Chris Lattner
7e1ff8d2d9 remove debugging code :-/ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23392 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 23:50:15 +00:00
Chris Lattner
eaba3a194c Implement SimplifyCFG/branch-phi-thread.ll, the most trivial case of threading 
control across branches with determined outcomes.  More generality to follow.
This triggers a couple thousand times in specint.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23391 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 23:49:37 +00:00
Nate Begeman
44728a7bb6 Stub out the rest of the DAG Combiner. Just need to fill in the 
select_cc bits and then wrap it in a convenience function for  use with
regular select.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23389 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 22:34:01 +00:00
Chris Lattner
cea8688ee4 Teach the local spiller to turn stack slot loads into register-register copies 
when possible, avoiding the load (and avoiding the copy if the value is already
in the right register).

This patch came about when I noticed code like the following being generated:

  store R17 -> [SS1]
  ...blah...
  R4 = load [SS1]

This was causing an LSU reject on the G5.  This problem was due to the register
allocator folding spill code into a reg-reg copy (producing the load), which
prevented the spiller from being able to rewrite the load into a copy, despite
the fact that the value was already available in a register.  In the case
above, we now rip out the R4 load and replace it with a R4 = R17 copy.

This speeds up several programs on X86 (which spills a lot :) ), e.g.
smg2k from 22.39->20.60s, povray from 12.93->12.66s, 168.wupwise from
68.54->53.83s (!), 197.parser from 7.33->6.62s (!), etc.  This may have a larger
impact in some cases on the G5 (by avoiding LSU rejects), though it probably
won't trigger as often (less spilling in general).

Targets that implement folding of loads/stores into copies should implement
the isLoadFromStackSlot hook to get this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23388 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 06:56:21 +00:00
Chris Lattner
a92aab74dd Implement the isLoadFromStackSlot interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23387 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 05:23:44 +00:00
Chris Lattner
7203e158da Refactor this code a bit and make it more general. This now compiles: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) { b.j += x; }

To:

_plus2:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        slwi r3, r3, 6
        add r3, r4, r3
        rlwimi r3, r4, 0, 26, 14
        stw r3, 0(r2)
        blr


instead of:

_plus2:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        rlwinm r5, r4, 26, 21, 31
        add r3, r5, r3
        rlwimi r4, r3, 6, 15, 25
        stw r4, 0(r2)
        blr

by eliminating an 'and'.

I'm pretty sure this is as small as we can go :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23386 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 07:22:02 +00:00
Chris Lattner
150f12af7f Compile 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) {
  b.j += x;
}

to:

plus2:
        mov %EAX, DWORD PTR [b]
        mov %ECX, %EAX
        and %ECX, 131008
        mov %EDX, DWORD PTR [%ESP + 4]
        shl %EDX, 6
        add %EDX, %ECX
        and %EDX, 131008
        and %EAX, -131009
        or %EDX, %EAX
        mov DWORD PTR [b], %EDX
        ret

instead of:

plus2:
        mov %EAX, DWORD PTR [b]
        mov %ECX, %EAX
        shr %ECX, 6
        and %ECX, 2047
        add %ECX, DWORD PTR [%ESP + 4]
        shl %ECX, 6
        and %ECX, 131008
        and %EAX, -131009
        or %ECX, %EAX
        mov DWORD PTR [b], %ECX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23385 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 06:30:59 +00:00
Chris Lattner
0b7c0bf249 Generalize this transform, using MaskedValueIsZero, allowing us to compile: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus3 (unsigned int x) { b.k += x; }

To:

plus3:
        mov %EAX, DWORD PTR [%ESP + 4]
        shl %EAX, 17
        add DWORD PTR [b], %EAX
        ret

instead of:

plus3:
        mov %EAX, DWORD PTR [%ESP + 4]
        shl %EAX, 17
        mov %ECX, DWORD PTR [b]
        add %EAX, %ECX
        and %EAX, -131072
        and %ECX, 131071
        or %ECX, %EAX
        mov DWORD PTR [b], %ECX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23384 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 06:02:59 +00:00
Chris Lattner
5aa7666ebe fix typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23383 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 05:25:20 +00:00
Chris Lattner
0d947ea943 Remove unintentionally committed code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23382 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 05:12:51 +00:00
Chris Lattner
11021cb988 implement shift.ll:test25. This compiles: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus3 (unsigned int x) {
  b.k += x;
}

to:

_plus3:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r3, 0(r2)
        rlwinm r4, r3, 0, 0, 14
        add r4, r4, r3
        rlwimi r4, r3, 0, 15, 31
        stw r4, 0(r2)
        blr

instead of:

_plus3:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        srwi r5, r4, 17
        add r3, r5, r3
        slwi r3, r3, 17
        rlwimi r3, r4, 0, 15, 31
        stw r3, 0(r2)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23381 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 05:12:10 +00:00
Chris Lattner
c8e7756791 Implement add.ll:test29. Codegening: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus1 (unsigned int x) {
  b.i += x;
}

as:
_plus1:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        add r3, r4, r3
        rlwimi r3, r4, 0, 0, 25
        stw r3, 0(r2)
        blr

instead of:

_plus1:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        rlwinm r5, r4, 0, 26, 31
        add r3, r5, r3
        rlwimi r3, r4, 0, 0, 25
        stw r3, 0(r2)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23379 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 04:24:45 +00:00
Chris Lattner
3255bd101d remove debug output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23377 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 03:50:25 +00:00
Chris Lattner
e9bed7d107 Implement or.ll:test21. This teaches instcombine to be able to turn this: 
struct {
   unsigned int bit0:1;
   unsigned int ubyte:31;
} sdata;

void foo() {
  sdata.ubyte++;
}

into this:

foo:
        add DWORD PTR [sdata], 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [sdata]
        mov %ECX, %EAX
        add %ECX, 2
        and %ECX, -2
        and %EAX, 1
        or %EAX, %ECX
        mov DWORD PTR [sdata], %EAX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23376 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 03:42:07 +00:00
Chris Lattner
6a78c2157a Implement hook for ppc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23374 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-17 01:03:26 +00:00
Nate Begeman
452d7bebaa More DAG combining. Still need the branch instructions, and select_cc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23371 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-16 00:54:12 +00:00
Chris Lattner
4ac85b3e94 disable this for now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23366 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-15 21:44:00 +00:00
Chris Lattner
2e3f5db9ff Give all operands names 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23357 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 21:11:13 +00:00
Chris Lattner
43ef1318c6 give all operands names 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23356 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 21:10:24 +00:00
Chris Lattner
4345a4a452 Fix some issues exposed by more testing. XORIS had the wrong operands 
specified.  The various *imm operands defined by PPC are really all i32,
even though the actual immediate is restricted to a smaller value in it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23352 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 20:53:05 +00:00
Chris Lattner
c36d065dce Fix some bugs noticed by new checking code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23350 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 18:18:39 +00:00
Chris Lattner
6e2f843114 Fix the regression last night compiling povray 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23348 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 17:32:56 +00:00
Chris Lattner
3452d23c34 fix a major regression from my patch this afternoon 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23347 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 06:06:45 +00:00
Chris Lattner
303b555164 we don't need this proto any longer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23342 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 22:05:21 +00:00
Chris Lattner
af16538511 move the #include for the generated code into the isel class body so we 
can use/define class methods


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23339 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 22:03:06 +00:00
Chris Lattner
7b738342f0 Change the arg lowering code to use copyfromreg from vregs associated 
with incoming arguments instead of the pregs themselves.  This fixes
the scheduler from causing problems by moving a copyfromreg for an argument
to after a select_cc node (now it can, and bad things won't happen).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23334 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:33:40 +00:00
Chris Lattner
8c4469840e This has been moved to the target-indep code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23333 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:32:18 +00:00
Chris Lattner
82da52299c This code is no longer needed, it is moved to the target-indep code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23332 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:31:44 +00:00
Chris Lattner
fa57702388 If a function has liveins, and if the target requested that they be plopped 
into particular vregs, emit copies into the entry MBB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23331 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:30:54 +00:00
Chris Lattner
f2cded73c4 Majik numbers are bad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23330 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:03:13 +00:00
Chris Lattner
31262ce53d Remove some dead vectors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23329 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 18:47:49 +00:00
Chris Lattner
7835cdde40 Add a simple xform to simplify array accesses with casts in the way. 
This is useful for 178.galgel where resolution of dope vectors (by the
optimizer) causes the scales to become apparent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23328 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 18:36:04 +00:00
Chris Lattner
396b2baf3c Fix an issue where LSR would miss rewriting a use of an IV expression by a PHI node that is not the original PHI. 
This fixes up a dot-product loop in galgel, speeding it up from 18.47s to
16.13s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23327 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 02:09:55 +00:00
Chris Lattner
eed48275a1 Add a helper function, allowing us to simplify some code a bit, changing 
indentation, no functionality change


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23325 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 00:40:14 +00:00
Chris Lattner
408902b3c4 Implement a simple xform to turn code like this: 
if () { store A -> P; } else { store B -> P; }

into a PHI node with one store, in the most trival case.  This implements
load.ll:test10.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23324 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 23:23:25 +00:00
Chris Lattner
9c1f0fd8de Another load-peephole optimization: do gcse when two loads are next to 
each other.  This implements InstCombine/load.ll:test9


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23322 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 22:21:03 +00:00
Chris Lattner
62f254df04 Implement a trivial form of store->load forwarding where the store and the 
load are exactly consequtive.  This is picked up by other passes, but this
triggers thousands of times in fortran programs that use static locals
(and is thus a compile-time speedup).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23320 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 22:00:15 +00:00
Chris Lattner
12b50410cd Fix a regression from last night, which caused this pass to create invalid 
code for IV uses outside of loops that are not dominated by the latch block.
We should only convert these uses to use the post-inc value if they ARE
dominated by the latch block.

Also use a new LoopInfo method to simplify some code.

This fixes Transforms/LoopStrengthReduce/2005-09-12-UsesOutOutsideOfLoop.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23318 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 17:11:27 +00:00
Chris Lattner
b6a69e70e0 Add a new getLoopLatch() method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23315 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 17:03:55 +00:00
Chris Lattner
c6bae65b49 _test: 
li r2, 0
LBB_test_1:     ; no_exit.2
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmpwi cr0, r2, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r2, 1
        stw r2, 0(r4)
        blr
[zion ~/llvm]$ cat > ~/xx
Uses of IV's outside of the loop should use hte post-incremented version
of the IV, not the preincremented version.  This helps many loops (e.g. in sixtrack)
which used to generate code like this (this is the code from the
dont-hoist-simple-loop-constants.ll testcase):

_test:
        li r2, 0                 **** IV starts at 0
LBB_test_1:     ; no_exit.2
        or r5, r2, r2            **** Copy for loop exit
        li r2, 0
        stw r2, 0(r3)
        addi r3, r3, 4
        addi r2, r5, 1
        addi r6, r5, 2           **** IV+2
        cmpwi cr0, r6, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r5, 2       ****  IV+2
        stw r2, 0(r4)
        blr

And now generated code like this:

_test:
        li r2, 1               *** IV starts at 1
LBB_test_1:     ; no_exit.2
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmpwi cr0, r2, 701     *** IV.postinc + 0
        blt cr0, LBB_test_1
LBB_test_2:     ; loopexit.2.loopexit
        stw r2, 0(r4)          *** IV.postinc + 0
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23313 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 06:04:47 +00:00
Chris Lattner
7259df3ab8 implement Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll. 
We used to emit this code for it:

_test:
        li r2, 1     ;; Value tying up a register for the whole loop
        li r5, 0
LBB_test_1:     ; no_exit.2
        or r6, r5, r5
        li r5, 0
        stw r5, 0(r3)
        addi r5, r6, 1
        addi r3, r3, 4
        add r7, r2, r5  ;; should be addi r7, r5, 1
        cmpwi cr0, r7, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r6, 2
        stw r2, 0(r4)
        blr

now we emit this:

_test:
        li r2, 0
LBB_test_1:     ; no_exit.2
        or r5, r2, r2
        li r2, 0
        stw r2, 0(r3)
        addi r3, r3, 4
        addi r2, r5, 1
        addi r6, r5, 2   ;; whoa, fold those adds!
        cmpwi cr0, r6, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r5, 2
        stw r2, 0(r4)
        blr

more improvement coming.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23306 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-10 01:18:45 +00:00
Chris Lattner
e6ec9f20c9 PowerPC cannot truncstore i1 natively 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23304 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-10 00:21:06 +00:00
Chris Lattner
13d58e71b7 Allow targets to say they don't support truncstore i1 (which includes a mask 
when storing to an 8-bit memory location), as most don't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23303 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-10 00:20:18 +00:00
Chris Lattner
a500fc681d Add a missing #include, patch courtesy of Baptiste Lepilleur. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23302 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 23:53:39 +00:00
Chris Lattner
3ec5d74fc5 Fix a problem duraid encountered on itanium where this folding: 
select (x < y), 1, 0 -> (x < y) incorrectly: the setcc returns i1 but the
select returned i32.  Add the zero extend as needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23301 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 23:00:07 +00:00
Chris Lattner
08addbd477 Fix a crash viewing dags that have target nodes in them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 22:35:03 +00:00
Chris Lattner
c9fe7508a5 I forgot that we always spill fp values as 64-bits. Implement spill folding 
for FP as well.  This triggers a couple dozen times on 177.mesa (for example).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23299 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 21:59:44 +00:00
Chris Lattner
f38df04c3a Fix a problem that Nate noticed, where spill code was not getting coallesced 
with copies, leading to code like this:

       lwz r4, 380(r1)
       or r10, r4, r4    ;; Last use of r4

By teaching the PPC backend how to fold spills into copies, we now get this
code:

       lwz r10, 380(r1)

wow. :)

This reduces a testcase nate sent me from 1505 instructions to 1484.

Note that this could handle FP values but doesn't currently, for reasons
mentioned in the patch


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23298 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 21:46:49 +00:00
Chris Lattner
1463019e84 code cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23297 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 20:51:08 +00:00
Chris Lattner
50ea01ed5b Use continue in the use-processing loop to make it clear what the early exits 
are, simplify logic, and cause things to not be nested as deeply.  This also
uses MRI->areAliases instead of an explicit loop.

No functionality change, just code cleanup.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23296 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 20:29:51 +00:00
Nate Begeman
39ee1ac7e5 Last round of 2-node folds from SD.cpp. Will move on to 3 node ops such 
as setcc and select next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23295 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:49:52 +00:00
Chris Lattner
ceb0a52231 remove debugging code *slaps head* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23294 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:19:20 +00:00
Chris Lattner
b11443dc84 When spilling a live range that is used multiple times by one instruction, 
only add a reload live range once for the instruction.  This is one step
towards fixing a regalloc pessimization that Nate notice, but is later undone
by the spiller (so no code is changed).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23293 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:17:47 +00:00
Chris Lattner
043870dd85 Teach the code generator that rlwimi is commutable if the rotate amount 
is zero.  This lets the register allocator elide some copies in some cases.

This implements CodeGen/PowerPC/rlwimi-commute.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23292 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 18:17:41 +00:00
Chris Lattner
2eb2517fbe Introduce two new concepts: 
1. Add support for defining Pattern's, which can match expressions when there
   is no instruction that directly implements something.  Instructions usually
   implicitly define patterns.
2. Add support for defining SDNodeXForm's, which are node transformations.
   This seperates the concept of a node xform out from the existing predicate
   support.

Using this new stuff, we add a few instruction patterns, one for testing, and
two for OR/XOR by an arbitrary immediate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23286 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 00:39:56 +00:00
Chris Lattner
b85c64c4d8 whitespace/comment changes, no functionality diffs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23283 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 23:17:26 +00:00
Nate Begeman
223df2269d Move yet more folds over to the dag combiner from sd.cpp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23278 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 20:18:10 +00:00
Chris Lattner
47f01f1b44 Add a bunch of stuff needed for node type inference. Move 'BLR' down with 
the rest of the instructions, add comment markers to seperate portions of
the file into logical parts


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23277 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 19:50:41 +00:00
Chris Lattner
bfde080ce0 add patterns for x?oris? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23268 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 17:40:49 +00:00
Chris Lattner
3e63ead49b add patterns to the addi/addis/mulli etc instructions. Define predicates 
for matching signed 16-bit and shifted 16-bit ppc immediates


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23267 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 17:33:10 +00:00
Chris Lattner
d1cdc7028c Add patterns for some new instructions, allowing the use of the ineg fragment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23266 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 17:01:54 +00:00
Chris Lattner
8c65344a15 ignore generated files 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23263 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:47:44 +00:00
Chris Lattner
19c0907ba1 Remove some cases handled by the generated portion of the isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23262 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:45:15 +00:00
Nate Begeman
9980119270 Another round of dag combiner changes. This fixes some missing XOR folds 
as well as fixing how we replace old values with new values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23260 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:25:52 +00:00
Chris Lattner
dc6e2e0a5f Fix a bug that Tzu-Chien Chiu noticed: live interval analysis does NOT 
preserve livevar


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23259 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 17:34:39 +00:00
Nate Begeman
f89d78d7c7 Implement a common missing fold, (add (add x, c1), c2) -> (add x, c1+c2). 
This restores all of stanford to being identical with and without the dag
combiner with the add folding turned off in sd.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23258 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 16:09:19 +00:00
Chris Lattner
c98d823649 On non-apple systems, when using -march=ppc32, do not print: 
'' is not a recognized processor for this target (ignoring processor)

Default to "generic" instead of "" for the default CPU.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23257 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:45:33 +00:00
Chris Lattner
3eb3369a25 Print: 
'' is not a recognized processor for this target (ignoring processor)

instead of:

 is not a recognized processor for this target (ignoring processor)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23256 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:44:14 +00:00
Chris Lattner
1e111c7bbb Fix a bug nate ran into with replacealluseswith. In the recursive cse case, 
we were losing a node, causing an assertion to fail.  Now we eagerly delete
discovered CSE's, and provide an optional vector to keep track of these
discovered equivalences.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23255 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:37:01 +00:00
Nate Begeman
2300f55046 Add an option to the DAG Combiner to enable it for beta runs, and turn on 
that option for PowerPC's beta.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23253 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 00:15:36 +00:00
Nate Begeman
c09eeec0eb Implement i64<->fp using the fctidz/fcfid instructions on PowerPC when we 
are allowed to generate 64-bit-only PowerPC instructions for 32 bit hosts,
such as the PowerPC 970.

This speeds up 189.lucas from 81.99 to 32.64 seconds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23250 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 22:03:27 +00:00
Andrew Lenharth
46a776e664 Fix up the AssertXext problem, as well as adding it at calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23246 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 17:00:23 +00:00
Nate Begeman
92cce90c66 Add note about future optimization noted in the ppc compiler writer's guide 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23245 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 15:30:48 +00:00
Nate Begeman
d401dff796 Add accessor for 64bit flag, so that we can tell when it is safe to 
generate the fun in-register fp<->long instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23244 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 15:30:12 +00:00
Nate Begeman
83e75ecd27 Next round of DAGCombiner changes. This version now passes all the tests 
I have run so far when run before Legalize.  It still needs to pick up the
SetCC folds, and nodes that use SetCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23243 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 04:43:02 +00:00
Andrew Lenharth
f71df33671 revert part of the last change, should fix regressions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23241 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-04 06:12:19 +00:00
Chris Lattner
e147ceb2fa explicitly specify an operands list for patterns with inputs (e.g. neg) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23240 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:28:40 +00:00
Chris Lattner
6cd40d5888 include the dag isel fragment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23239 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:17:22 +00:00
Chris Lattner
bb38b6f8c0 ask for a dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23238 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:15:41 +00:00
Chris Lattner
6a8a21ced4 Fix a checking failure in gs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23235 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:04:40 +00:00
Chris Lattner
25dae727f3 Change the isel to not break out of the big giant switch. Instead, the 
switch should never be exited, so its bottom is now unreachable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23234 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 00:53:47 +00:00
Chris Lattner
7cd09cf942 rearrange logical ops to group them together more consistently. 
Define the PatFrag class which can be used to define subpatterns to match
things with.  Define 'not', and use it to define the patterns for andc,
nand, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23233 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 00:21:51 +00:00
Chris Lattner
6159fb20c2 Add AND/OR/XOR 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23232 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 22:35:53 +00:00
Nate Begeman
646d7e2727 Next round of DAG Combiner changes. Just need to support multiple return 
values, and then we should be able to hook it up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23231 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 21:18:40 +00:00
Chris Lattner
218a15d02c Add some initial patterns to simple binary instructions, though they 
currently don't do anything.  This elides patterns for binary operators
that ping on the carry flag, since we don't model it yet.

This patch also removes PPC::SUB, because it is dead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23230 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 21:18:00 +00:00
Chris Lattner
6fdcb250d5 Clean up some code from the last checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23229 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 20:32:45 +00:00
Chris Lattner
99c25b86aa Fix a bug in legalize where it would emit two calls to libcalls that return 
i64 values on targets that need that expanded to 32-bit registers.  This fixes
PowerPC/2005-09-02-LegalizeDuplicatesCalls.ll and speeds up 189.lucas from
taking 122.72s to 81.96s on my desktop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23228 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 20:26:58 +00:00
Chris Lattner
73e37c35be turn on dag isel by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23226 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:53:54 +00:00
Chris Lattner
70b9b1098a Make sure to auto-cse nullary ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23224 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:36:17 +00:00
Jim Laskey
839615a510 Add help support for -mcpu and -mattr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23222 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:27:43 +00:00
Chris Lattner
6621e3b963 Fix some buggy logic where we would try to remove nodes with two operands 
from the binary ops map, even if they had multiple results.  This latent bug
caused a few failures with the dag isel last night.

To prevent stuff like this from happening in the future, add some really
strict checking to make sure that the CSE maps always match up with reality!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23221 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:15:44 +00:00
Andrew Lenharth
aa38ce436b Pull out Lowering in preperation for multiple ISels. Oh, and get rid of some stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23220 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 18:46:02 +00:00
Chris Lattner
fd88f64934 Don't create zero sized stack objects even for array allocas with a zero 
number of elements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23219 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 18:41:28 +00:00
Chris Lattner
1e9de3ed2d Decouple fsqrt from gpul optimizations, implementing fsqrt.ll. 
Remove the -enable-gpopt option which is subsumed by feature flags.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23218 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 18:33:05 +00:00
Chris Lattner
a639a43602 Fix the release build, noticed by Eric van Riet Paap 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23215 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 07:09:28 +00:00
Chris Lattner
7b4ad94282 Fix a problem that Dan Berlin noticed, where reassociation would not succeed 
in building maximal expressions before simplifying them.  In particular, i
cases like this:

X-(A+B+X)

the code would consider A+B+X to be a maximal expression (not understanding
that the single use '-' would be turned into a + later), simplify it (a noop)
then later get simplified again.

Each of these simplify steps is where the cost of reassociation comes from,
so this patch should speed up the already fast pass a bit.

Thanks to Dan for noticing this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23214 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 07:07:58 +00:00
Chris Lattner
2cd85da3ed Avoid creating garbage instructions, just move the old add instruction 
to where we need it when converting -(A+B+C) -> -A + -B + -C.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23213 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 06:38:04 +00:00
Chris Lattner
368a3aabb2 add some assertions and fix problems where reassociate could access the 
Ops vector out of range


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23211 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 05:23:22 +00:00
Jeff Cohen
7cd57f4c45 Fix VC++ build errors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23210 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 02:51:42 +00:00
Chris Lattner
f505949580 Restore this patch now that the latent bug has been fixed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23209 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 01:24:55 +00:00
Chris Lattner
08951a32fb Make sure to legalize assert[zs]ext's operand correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23208 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 01:15:01 +00:00
Chris Lattner
5b3224fe7e Revert the previous patch which causes a mysterious regression in toast. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23207 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:47:05 +00:00
Chris Lattner
5ab6f5fe66 Teach live intervals to not crash on dead livein regs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23206 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:20:32 +00:00
Chris Lattner
fab08875b7 For values that are live across basic blocks and need promotion, use ANY_EXTEND 
instead of ZERO_EXTEND to eliminate extraneous extensions.  This eliminates
dead zero extensions on formal arguments and other cases on PPC, implementing
the newly tightened up test/Regression/CodeGen/PowerPC/small-arguments.ll test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23205 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:19:37 +00:00
Chris Lattner
13c78e2e5f legalize ANY_EXTEND appropriately 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23204 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:18:10 +00:00
Chris Lattner
4ed11b4b79 Add support for ANY_EXTEND and add a few minor folds for it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23203 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:17:32 +00:00
Chris Lattner
fb8b8a75ff Handle any_extend like zext 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23202 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:16:09 +00:00
Chris Lattner
26e04bbf77 Handle ANY_EXTEND like ZERO_EXTEND. Simplify the extend/truncate code on 
the observation that it only has to handle i1 -> i64 and i64 -> i1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23201 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:15:30 +00:00
Chris Lattner
2a00daac58 Implement small-arguments.ll:test3 by teaching the DAG optimizer that 
the results of calls to functions returning small values are properly
sign/zero extended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23198 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:44:32 +00:00
Nate Begeman
39f60a2302 Fix some code in the current node combining code, spotted when it was moved 
over to DAGCombiner.cpp

1. Don't assume that SetCC returns i1 when folding (xor (setcc) constant)
2. Don't duplicate code in folding AND with AssertZext that is handled by
   MaskedValueIsZero


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23196 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:25:49 +00:00
Nate Begeman
4ebd805c6a Implement first round of feedback from chris (there's still a couple things 
left to do).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23195 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:24:04 +00:00
Chris Lattner
2b8ad8e55a Align functions to 16-byte boundaries, to eliminate noise in performance measurements. This improves the performance of 'treeadd' by about 20% with the dag 
isel, restoring it to the pattern-isel level (which happens to get the alignment right).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23194 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:08:50 +00:00
Chris Lattner
a82f7b2be0 Local labels on darwin apparently start with just 'L', not .L like other 
platforms.  This reduces executable size and makes shark realize the actual
bounds of functions instead of showing each MBB as a function :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23193 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:48:35 +00:00
Jim Laskey
b1e1180ca0 1. Use SubtargetFeatures in llc/lli. 
2. Propagate feature "string" to all targets.

3. Implement use of SubtargetFeatures in PowerPCTargetSubtarget.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23192 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:38:21 +00:00
Jim Laskey
b3302db18a This new class provides support for platform specific "features". The intent 
is to manage processor specific attributes from the command line.  See examples
of use in llc/lli and PowerPCTargetSubtarget.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23191 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:36:18 +00:00
Chris Lattner
75592e4137 Implement dynamic allocas correctly. In particular, because we were copying 
directly out of R1 (without using a CopyFromReg, which uses a chain), multiple
allocas were getting CSE'd together, producing bogus code.  For this:

int %foo(bool %X, int %A, int %B) {
        br bool %X, label %T, label %F
F:
        %G = alloca int
        %H = alloca int
        store int %A, int* %G
        store int %B, int* %H
        %R = load int* %G
        ret int %R
T:
        ret int 0
}

We were generating:

_foo:
        stwu r1, -16(r1)
        stw r31, 4(r1)
        or r31, r1, r1
        stw r1, 12(r31)
        cmpwi cr0, r3, 0
        bne cr0, .LBB_foo_2     ; T
.LBB_foo_1:     ; F
        li r2, 16
        subf r2, r2, r1   ;; One alloca
        or r1, r2, r2
        or r3, r1, r1
        or r1, r2, r2
        or r2, r1, r1
        stw r4, 0(r3)
        stw r5, 0(r2)
        lwz r3, 0(r3)
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr
.LBB_foo_2:     ; T
        li r3, 0
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr

Now we generate:

_foo:
        stwu r1, -16(r1)
        stw r31, 4(r1)
        or r31, r1, r1
        stw r1, 12(r31)
        cmpwi cr0, r3, 0
        bne cr0, .LBB_foo_2     ; T
.LBB_foo_1:     ; F
        or r2, r1, r1
        li r3, 16
        subf r2, r3, r2  ;; Alloca 1
        or r1, r2, r2
        or r2, r1, r1
        or r6, r1, r1
        subf r3, r3, r6  ;; Alloca 2
        or r1, r3, r3
        or r3, r1, r1
        stw r4, 0(r2)
        stw r5, 0(r3)
        lwz r3, 0(r2)
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr
.LBB_foo_2:     ; T
        li r3, 0
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr

This fixes Povray and SPASS with the dag isel, the last two failing cases.
Tommorow we will hopefully turn it on by default! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23190 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:31:30 +00:00
Chris Lattner
393ecd6d2d Fix a bug where we were useing HA to get the high part, which seems like it 
could cause a miscompile.  Fixing this didn't fix the two programs that fail
though.  :(

This also changes the implementation to follow the pattern selector more
closely, causing us to select 0 to li instead of lis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23189 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 19:38:28 +00:00
Chris Lattner
50ff55c2c7 Do not select the operands being passed into SelectCC. IT does this itself 
and selecting early prevents folding immediates into the cmpw* instructions


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23188 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 19:20:44 +00:00
Chris Lattner
da8abb0239 It is NDEBUG not _NDEBUG 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23186 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 18:44:10 +00:00
Nate Begeman
4942a9687d Add the rest of the currently implemented visit routines to the switch 
statement in visit().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23185 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 00:33:32 +00:00
Nate Begeman
1d4d414111 First pass at the DAG Combiner. It isn't used anywhere yet, but it should 
be mostly functional.  It currently has all folds from SelectionDAG.cpp
that do not involve a condition code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23184 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 00:19:25 +00:00
Chris Lattner
a1f68ca94e If a function has live ins/outs, print them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23181 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 22:34:59 +00:00
Chris Lattner
f76053269e Move FCTIWZ handling out of the instruction selectors and into legalization, 
getting them out of the business of making stack slots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23180 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 21:09:52 +00:00
Chris Lattner
8346bb6c29 Remove dead code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23179 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 20:25:15 +00:00
Chris Lattner
bc11c3482c Move SHL,SHR i64 -> legalizer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23178 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 20:23:54 +00:00
Chris Lattner
c22af9e5df Remove code that is now dead from the pattern isel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23177 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 19:11:36 +00:00
Chris Lattner
eb9b62e35e lower sra_parts on the dag, implementing it for the dag isel, and exposing 
the ops to dag optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23176 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 19:09:57 +00:00
Chris Lattner
50ec897904 Allow targets to custom expand shifts that are too large for their registers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23173 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 19:01:53 +00:00
Chris Lattner
99296ffd36 add assert zext/sext to the dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23171 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 18:08:46 +00:00
Chris Lattner
5dd7fea3f2 Handle AssertSext/AssertZext nodes, fixing the regressions last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23170 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 17:48:04 +00:00
Jeff Cohen
7383ce4127 Fix VC++ precedence warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23169 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 02:47:06 +00:00
Nate Begeman
49296f1f48 Enable generation of AssertSext and AssertZext in the PPC backend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23168 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 01:58:39 +00:00
Chris Lattner
7a49fdcd11 Fix 'ret long' to return the high and lo parts in the right registers. This 
fixes crafty and probably others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23167 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 01:34:29 +00:00
Nate Begeman
fe75a2836a Sigh, not my day. Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23166 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:43:49 +00:00
Nate Begeman
9f52f2838d Fix a mistake in my previous patch pointed out by sabre; the AssertZext 
case in MaskedValueIsZero was wrong.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23165 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:43:08 +00:00
Nate Begeman
b85dfab889 Remove some unnecessary casts, and add the AssertZext case to 
MaskedValueIsZero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23164 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:27:53 +00:00
Chris Lattner
eb80fe8ff6 now that physregs can exist in the same dag with multiple types, remove some 
ugly hacks


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23162 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 22:59:48 +00:00
Chris Lattner
0fdd768094 Allow physregs to occur in the dag with multiple types. Though I don't likethis, it is a requirement on PPC, which can have an f32 value in r3 at onepoint in a function and a f64 value in r3 at another point. :( 
This fixes compilation of mesa


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23161 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 22:38:38 +00:00
Chris Lattner
2ea0c66ae5 Fix type mismatches when passing f32 values to calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23159 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 21:28:19 +00:00
Chris Lattner
e836ad6736 When checking the fixed intervals, don't forget to check for register aliases. 
This fixes PR621 and Regression/CodeGen/X86/2005-08-30-RegAllocAliasProblem.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23158 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 21:03:36 +00:00
Chris Lattner
1368721d53 Fix some indentation (first hunks). 
Remove code (last hunk) that miscompiled immediate and's, such as
  and uint %tmp.30, 4294958079

into

 andi. r8, r8, 56319
 andis. r8, r8, 65535

instead of:

 li r9, -9217
 and r8, r8, r9

The first always generates zero.

This fixes espresso.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23155 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 18:37:48 +00:00
Chris Lattner
b551ba7661 Fix a problem Nate found where we swapped the operands of SHL/SHR_PARTS. This 
fixes fourinarow


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23153 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:42:59 +00:00
Chris Lattner
14b86c72a2 codegen ADD_PARTS correctly: put the results in the right registers! This 
fixes fhourstones


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23152 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:40:13 +00:00
Chris Lattner
cc0675a4be Fix FreeBench/fourinarow with the dag isel, by not adding a bogus result 
to SHIFT_PARTS nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23151 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:21:17 +00:00
Chris Lattner
2501d5e29c add operands in the right order, fixing McCat/18-imp with the dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23150 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:13:58 +00:00
Chris Lattner
ec176e30d6 Fix a miscompile of PtrDist/bc. Sign extending bools is not the right thing, 
at least tends to expose problems elsewhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23149 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 16:56:19 +00:00
Nate Begeman
5ffcd9b56c Remove a bogus piece of my AssertSext/AssertZext patch. oops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23148 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 02:54:28 +00:00
Nate Begeman
56eb86806d Add support for AssertSext and AssertZext, folding other extensions with 
them.  This allows for elminination of redundant extends in the entry
blocks of functions on PowerPC.

Add support for i32 x i32 -> i64 multiplies, by recognizing when the inputs
to ISD::MUL in ExpandOp are actually just extended i32 values and not real
i64 values.  this allows us to codegen

int mulhs(int a, int b) { return ((long long)a * b) >> 32; }
as:
_mulhs:
        mulhw r3, r4, r3
        blr

instead of:
_mulhs:
        mulhwu r2, r4, r3
        srawi r5, r3, 31
        mullw r5, r4, r5
        add r2, r2, r5
        srawi r4, r4, 31
        mullw r3, r4, r3
        add r3, r2, r3
        blr

with a similar improvement on x86.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23147 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 02:44:00 +00:00
Chris Lattner
f155635b53 Name this variable to be what it really is! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23145 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 01:58:51 +00:00
Chris Lattner
55334fc45c Handle CopyToReg nodes with flag operands correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23144 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 01:57:23 +00:00
Chris Lattner
31ce12f4f5 Make sure the selector emits register register copies with flag operands 
linking them to calls when appropriate, this prevents the scheduler from
pulling these copies away from the call.

This fixes Ptrdist/yacr2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23143 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 01:57:02 +00:00
Chris Lattner
15055733f8 The first operand to AND does not always have more than two operands. This 
fixes MediaBench/toast with the dag selector


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23141 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 00:59:16 +00:00
Chris Lattner
6de08f4377 Fix a bug in my patch for legalizing to fsel. It cannot handle seteq/setne, 
which I failed to include when I moved the code over.  This fixes
MallocBench/gs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23140 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 00:45:18 +00:00
Chris Lattner
8f838720ad emit FMR instructions to convert f64<->f32 instructions, so things like 
STOREs, know the right type to store.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23139 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 00:30:43 +00:00
Chris Lattner
915fb302b1 Fix some really strange indentation that xcode likes to use. 
no xcode, this is not right:

   if (!foo) break;
     X;


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23138 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 00:19:00 +00:00
Chris Lattner
8bbcc20a9d fix a crash in cfrac 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23137 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 23:49:25 +00:00
Chris Lattner
9c2dece8e2 Implement DYNAMIC_STACKALLOC, wrap some long lines 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23136 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 23:30:11 +00:00
Chris Lattner
82e14db9a9 Add a hack to avoid some horrible code in some cases by always emitting 
token chains first.  For this C function:

int test() {
  int i;
  for (i = 0; i < 100000; ++i)
    foo();
}

Instead of emitting this (condition before call)

.LBB_test_1:    ; no_exit
        addi r30, r30, 1
        lis r2, 1
        ori r2, r2, 34464
        cmpw cr2, r30, r2
        bl L_foo$stub
        bne cr2, .LBB_test_1    ; no_exit

Emit this:

.LBB_test_1:    ; no_exit
        bl L_foo$stub
        addi r30, r30, 1
        lis r2, 1
        ori r2, r2, 34464
        cmpw cr0, r30, r2
        bne cr0, .LBB_test_1    ; no_exit

Which makes it so we don't have to save/restore cr2 in the prolog/epilog of
the function.

This also makes the code much more similar to what the pattern isel produces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23135 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 23:21:29 +00:00
Chris Lattner
7107c10501 Fix a dumb bug of mine where we were mishandling the PPC ABI (undef handling). 
This fixes voronoi and bh in Olden, allowing all of olden to pass!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23133 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 22:22:57 +00:00
Chris Lattner
c26aefa15a Add a new API for Nate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23131 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 21:59:31 +00:00
Andrew Lenharth
5e3efbc2ca Some of us cared about the the promote path 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23130 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 20:46:51 +00:00
Chris Lattner
507f752f6e Fix an infinite loop on x86 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23129 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 17:30:00 +00:00
Chris Lattner
d00b28809d Allow bugpoint+PPC codegen to use fsqrt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23128 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 13:14:24 +00:00
Chris Lattner
efa6abcb95 Fix a bug the last patch exposed in treeadd among others 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23127 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 01:07:02 +00:00
Chris Lattner
2fef809b5b A hack to fix a problem folding immedaites. This fixes Olden/power. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23126 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 01:01:01 +00:00
Chris Lattner
2a06a5ef36 Fix order of operands for copytoreg node when emitting calls. This fixes 
Olden/msFix order of operands for copytoreg node when emitting calls.  This fixes
Olden/mstt.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23125 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 00:26:57 +00:00
Chris Lattner
dfd58709cc Fix a bug in my previous patch that was using the wrong iterator. This fixes 
Olden/bisort among others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23124 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 00:10:46 +00:00
Chris Lattner
b9efd14568 add operands in the correct order 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23123 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 00:02:01 +00:00
Chris Lattner
ff01698ec0 Fix a bug in ReplaceAllUsesWith 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23122 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-28 23:59:36 +00:00
Chris Lattner
c8a89a1fcb Fix a bug in FP_EXTEND, implement FP_TO_SINT 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23121 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-28 23:59:09 +00:00
Chris Lattner
528f58e813 fix an assertion failure in treeadd 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23120 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-28 23:39:22 +00:00
Reid Spencer
dd22dc85ea Adjust to member variable name change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23119 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-27 19:09:48 +00:00
Reid Spencer
0f9beca707 Change the names of member variables per Chris' instructions, and document 
them more clearly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23118 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-27 19:09:02 +00:00
Reid Spencer
68a24bdba4 Implement PR614: 
These changes modify the makefiles so that the output of flex and bison are
placed in the SRC directory, not the OBJ directory. It is intended that they
be checked in as any other LLVM source so that platforms without convenient
access to flex/bison can be compiled. From now on, if you change a .y or
.l file you *must* also commit the generated .cpp and .h files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23115 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-27 18:50:39 +00:00
Chris Lattner
88b9c15912 Disable this code, which broke many tests last night 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23114 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-27 16:16:51 +00:00
Chris Lattner
620c93cca1 fix PHI node emission for basic blocks that have select_cc's in them on ppc32 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23113 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-27 00:58:02 +00:00
Chris Lattner
e3f1c97734 The condition register being branched on may not be cr0, as such, print it. 
This fixes: UnitTests/2005-07-17-INT-To-FP.c


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23112 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 23:42:05 +00:00
Chris Lattner
f48e83ded0 Propagate cr# from COND_BRANCH to the actual branch instruction as appropriate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23111 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 23:41:27 +00:00
Chris Lattner
eb150d7d1f Nate noticed that Andrew never did this. This fixes PR600 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23110 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 22:50:40 +00:00
Chris Lattner
9d3a483a38 Don't copy regs that are only used in the entry block into a vreg. This 
changes the code generated for:

short %test(short %A) {
  %B = xor short %A, -32768
  ret short %B
}

to:

_test:
        xori r2, r3, 32768
        xoris r2, r2, 65535
        extsh r3, r2
        blr

instead of:

_test:
        rlwinm r2, r3, 0, 16, 31
        xori r2, r3, 32768
        xoris r2, r2, 65535
        extsh r3, r2
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23109 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 22:49:59 +00:00
Chris Lattner
ed461e0faf Make this code safe for when loadRegFromStackSlot inserts multiple instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23108 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 22:18:32 +00:00
Chris Lattner
28b9cc2d13 allow code using mtcrf to assemble 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23107 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 22:05:54 +00:00
Nate Begeman
a0df5d8da5 Remove operand type 'crbit', since it is no longer used 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23106 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 22:04:17 +00:00
Chris Lattner
82972705df teach getClass what a condition reg is 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23105 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 21:51:29 +00:00
Chris Lattner
5087daac23 Minor cleanups: 
* avoid calling getClass() multiple times (it is relatively expensive)
  * Allow -disable-fp-elim to turn of frame pointer elimination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23104 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 21:49:18 +00:00
Chris Lattner
579cfabdad Checking types here is not safe, because multiple types can map to the same 
register class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23103 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 21:39:15 +00:00
Chris Lattner
8a2d3ca7df implement SELECT_CC fully for the DAG->DAG isel! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23101 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 21:23:58 +00:00
Chris Lattner
e3cbf823f0 spell this right 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23099 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 20:55:40 +00:00
Chris Lattner
025c39bf36 Call the InsertAtEndOfBasicBlock hook if the usesCustomDAGSchedInserter 
flag is set on an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23098 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 20:54:47 +00:00
Chris Lattner
0efa0f9ee9 Add a flag 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23092 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 20:29:01 +00:00
Chris Lattner
0bbea95433 Make fsel emission work with both the pattern and dag-dag selectors, by 
giving it a non-instruction opcode.  The dag->dag selector used to not
select the operands of the fsel, because it thought that whole tree was
already selected.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23091 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 20:25:03 +00:00
Chris Lattner
13794f5d01 implement the fold for: 
bool %test(int %X, int %Y) {
        %C = setne int %X, 0
        ret bool %C
}

to:

_test:
        addic r2, r3, -1
        subfe r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23089 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 18:46:49 +00:00
Chris Lattner
52987f4f65 Changes to adjust to new ReplaceAllUsesWith syntax. Change FP_EXTEND to 
just return its input, instead of emitting an explicit copy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23088 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 18:37:23 +00:00
Chris Lattner
8b52f21f10 Revampt ReplaceAllUsesWith to be more efficient and easier to use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23087 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 18:36:28 +00:00
Nate Begeman
60675f7562 Remove some code made dead by the fsel patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23085 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:45:06 +00:00
Chris Lattner
28b9be300c now that fsel is formed during legalization, this code is dead 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23084 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:40:39 +00:00
Chris Lattner
0b1e4e508b implement the other half of the select_cc -> fsel lowering, which handles 
when the RHS of the comparison is 0.0.  Turn this on by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23083 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:36:52 +00:00
Chris Lattner
143b675393 Fix a bug in my previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23082 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:18:44 +00:00
Chris Lattner
5839bf2b3b Change ConstantPoolSDNode to actually hold the Constant itself instead of 
putting it into the constant pool.  This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23081 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:15:30 +00:00
Chris Lattner
95e0682a42 Fix some warnings in an optimized build 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23080 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 16:38:51 +00:00
Chris Lattner
2bb06cdf27 Fix a huge annoyance: SelectNodeTo took types before the opcode unlike 
every other SD API.  Fix it to take the opcode before the types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23079 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 16:36:26 +00:00
Nate Begeman
6718f11feb Fix JIT encoding of conditional branches 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23076 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 04:11:42 +00:00
Chris Lattner
e4bc9ea0a5 add initial support for converting select_cc -> fsel in the legalizer 
instead of in the backend.  This currently handles fsel cases with registers,
but doesn't have the 0.0 and -0.0 optimization enabled yet.

Once this is finished, special hack for fp immediates can go away.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23075 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:52:45 +00:00
Chris Lattner
d7050a9c50 the 5th operand is the 4th number 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23074 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:43:46 +00:00
Nate Begeman
bb22df31d9 SUBFIC produces two results, not one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23073 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:34:06 +00:00
Nate Begeman
6660cd65cf Implement SHL_PARTS and SRL_PARTS 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23072 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:28:00 +00:00
Chris Lattner
23004e5f21 Add support for targets that want to custom expand select_cc in some cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23071 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:23:59 +00:00
Chris Lattner
07dffd6af6 Allow LowerOperation to return a null SDOperand in case it wants to lower 
some things given to it, but not all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23070 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:14:16 +00:00
Chris Lattner
f07d023dd9 Fix a nasty bug from a previous patch of mine 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23069 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:13:12 +00:00
Chris Lattner
b20c318df0 Emit the lo/hi parts in the right order :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23068 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 23:36:49 +00:00
Chris Lattner
a9317ed361 implement support for 64-bit add/sub, fix a broken assertion for 64-bit 
return.  Allow the udiv breaker-upper to work with any non-zero constant
operand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23066 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 23:21:06 +00:00