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12775 Commits

Author SHA1 Message Date
Chris Lattner
8eae5f68d5 add an option to turn on LSR. 
llvm-svn: 26080
 2006-02-09 05:06:36 +00:00
Chris Lattner
e976315aec simplify this code now that each constant pool entry is not separately allocated 
llvm-svn: 26079
 2006-02-09 04:49:59 +00:00
Chris Lattner
c81f375f21 Adjust to MachineConstantPool interface change: instead of keeping a 
value/alignment pair for each constant, keep a value/offset pair.

llvm-svn: 26078
 2006-02-09 04:46:04 +00:00
Chris Lattner
1111a4b76d rename fields of constant pool entries 
llvm-svn: 26076
 2006-02-09 04:22:52 +00:00
Chris Lattner
837a816470 Simplify code, alignment must be specified now. 
llvm-svn: 26074
 2006-02-09 02:26:04 +00:00
Chris Lattner
86d5e100d2 Make MachineConstantPool entries alignments explicit 
llvm-svn: 26071
 2006-02-09 02:23:13 +00:00
Chris Lattner
79b2108a41 Always pass in an alignment. 
llvm-svn: 26070
 2006-02-09 02:19:16 +00:00
Chris Lattner
3ff29575b8 provide an explicit alignment for cp entries 
llvm-svn: 26069
 2006-02-09 02:15:30 +00:00
Evan Cheng
521e5a1bfe Change Select() from 
SDOperand Select(SDOperand N);
to
void Select(SDOperand &Result, SDOperand N);

llvm-svn: 26067
 2006-02-09 00:37:58 +00:00
Chris Lattner
2e1a495967 Darwin doesn't support #APP/#NO_APP 
llvm-svn: 26066
 2006-02-08 23:42:22 +00:00
Chris Lattner
6556f15ad8 Add support for assembler directives that wrap inline asm 
llvm-svn: 26065
 2006-02-08 23:41:56 +00:00
Chris Lattner
47ef931412 Rename BSel -> PPCBSel for the benefit of doxygen users. 
Move the methods out of line.
Remove unused Debug.h stuff.
Teach getNumBytesForInstruction to know the size of an inline asm.

llvm-svn: 26064
 2006-02-08 19:33:26 +00:00
Chris Lattner
9cc9988279 add a simple optimization 
llvm-svn: 26062
 2006-02-08 17:47:22 +00:00
Chris Lattner
f2caea42c9 Simplify some code, reducing calls to MaskedValueIsZero. Implement a minor 
optimization where we reduce the number of bits in AND masks when possible.

llvm-svn: 26056
 2006-02-08 07:34:50 +00:00
Chris Lattner
560429667e more email -> README moving 
llvm-svn: 26054
 2006-02-08 07:12:07 +00:00
Chris Lattner
86d1dcf613 Emit the 'mr' pseudoop for easier reading. 
llvm-svn: 26053
 2006-02-08 06:56:40 +00:00
Chris Lattner
a4b6082b7a Add some random notes, not high-prio 
llvm-svn: 26052
 2006-02-08 06:52:06 +00:00
Chris Lattner
881c8c12ff Move emails from nate into public places 
llvm-svn: 26051
 2006-02-08 06:43:51 +00:00
Chris Lattner
8359f9fbbb Use EraseInstFromFunction in a few cases to put the uses of the removed 
instruction onto the worklist (in case they are now dead).

Add a really trivial local DSE implementation to help out bitfield code.
We now fold this:

struct S {
    unsigned char a : 1, b : 1, c : 1, d : 2, e : 3;
    S();
};

S::S() : a(0), b(0), c(1), d(0), e(6) {}

to this:

void %_ZN1SC1Ev(%struct.S* %this) {
entry:
        %tmp.1 = getelementptr %struct.S* %this, int 0, uint 0
        store ubyte 38, ubyte* %tmp.1
        ret void
}

much earlier (in gccas instead of only in gccld after DSE runs).

llvm-svn: 26050
 2006-02-08 03:25:32 +00:00
Chris Lattner
09ae00eba1 Implement some more interesting select sccp cases. This implements: 
test/Regression/Transforms/SCCP/select.ll

llvm-svn: 26049
 2006-02-08 02:38:11 +00:00
Chris Lattner
50f604c041 Compile this: 
xori r6, r2, 1
        rlwinm r6, r6, 0, 31, 31
        cmpwi cr0, r6, 0
        bne cr0, LBB1_3 ; endif

to this:

        rlwinm r6, r2, 0, 31, 31
        cmpwi cr0, r6, 0
        beq cr0, LBB1_3 ; endif

llvm-svn: 26047
 2006-02-08 02:13:15 +00:00
Chris Lattner
57aca014c2 Fix a problem in my patch yesterday, causing a miscompilation of 176.gcc 
llvm-svn: 26045
 2006-02-08 01:20:23 +00:00
Evan Cheng
de20d3fb32 Fixed a local common symbol bug. 
llvm-svn: 26044
 2006-02-07 23:32:58 +00:00
Evan Cheng
a505719b8a For ELF, .comm takes alignment value as the optional 3rd argument. It must be 
specified in bytes.

llvm-svn: 26043
 2006-02-07 21:54:08 +00:00
Chris Lattner
abaa15898f Implement getConstraintType for PPC. 
llvm-svn: 26042
 2006-02-07 20:16:30 +00:00
Chris Lattner
a3f2d4c4f2 Fix Transforms/InstCombine/2006-02-07-SextZextCrash.ll 
llvm-svn: 26040
 2006-02-07 19:07:40 +00:00
Evan Cheng
15369d0b89 Darwin ABI issues: weak, linkonce, etc. dynamic-no-pic support is complete. 
Also fixed a function stub bug. Added weak and linkonce support for
x86 Linux.

llvm-svn: 26038
 2006-02-07 08:38:37 +00:00
Evan Cheng
a7d31e53e8 Remind myself to add PIC and static asm printer support. 
llvm-svn: 26037
 2006-02-07 08:35:44 +00:00
Chris Lattner
9a35257363 Generalize MaskedValueIsZero into a ComputeMaskedNonZeroBits function, which 
is just as efficient as MVIZ and is also more general.

Fix a few minor bugs introduced in recent patches

llvm-svn: 26036
 2006-02-07 08:05:22 +00:00
Chris Lattner
c1a185741c Make MaskedValueIsZero take a uint64_t instead of a ConstantIntegral as a 
mask.  This allows the code to be simpler and more efficient.

Also, generalize some of the cases in MVIZ a bit, making it slightly more aggressive.

llvm-svn: 26035
 2006-02-07 07:27:52 +00:00
Chris Lattner
6318e7b7b7 Use Type::getIntegralTypeMask() to simplify some code 
llvm-svn: 26034
 2006-02-07 07:00:41 +00:00
Chris Lattner
a0d7868722 Implement the beginnings of a facility for simplifying expressions based on 
'demanded bits', inspired by Nate's work in the dag combiner.  This isn't
complete, but needs to unrelated instcombiner changes to continue.

llvm-svn: 26033
 2006-02-07 06:56:34 +00:00
Jeff Cohen
e66383eb06 The interpreter assumes that the caller of runFunction() must be lli, and 
therefore the function being called must be a main() returning an int.  The
consequences when these assumptions are false are not good, so don't assume
them.

llvm-svn: 26031
 2006-02-07 05:29:44 +00:00
Jeff Cohen
909ee648c7 Teach the interpreter to handle global variables that are added to a module after 
interpretation has begun.  The JIT already handles this situation correctly, and
the interpreter can already handle new functions being added.

llvm-svn: 26030
 2006-02-07 05:11:57 +00:00
Chris Lattner
50af3c6eb7 Add the simple PPC integer constraints 
llvm-svn: 26027
 2006-02-07 00:47:13 +00:00
Chris Lattner
da4bd5c64e Eliminate the printCallOperand method, using a 'call' modifier on 
printOperand instead.

llvm-svn: 26025
 2006-02-06 23:41:19 +00:00
Chris Lattner
b6fae6bad7 Change prototype 
llvm-svn: 26022
 2006-02-06 22:18:19 +00:00
Chris Lattner
35a536d1f4 Add support for modifier characters to operand printers 
llvm-svn: 26021
 2006-02-06 22:17:23 +00:00
Jim Laskey
f36d437b39 Goodbye nasty macro. 
llvm-svn: 26019
 2006-02-06 21:54:05 +00:00
Jim Laskey
0cfdd812d1 Edit requests from Sabre. 
llvm-svn: 26018
 2006-02-06 19:12:02 +00:00
Andrew Lenharth
10a2391def see what this allignment thing will do 
llvm-svn: 26017
 2006-02-06 17:15:17 +00:00
Jim Laskey
e27947e8fb Changing model for the construction of debug information. 
llvm-svn: 26016
 2006-02-06 15:33:21 +00:00
Jim Laskey
62908083eb We seem to have settled to __DWARF for section name. 
llvm-svn: 26015
 2006-02-06 14:16:15 +00:00
Evan Cheng
080996281c - Update load folding checks to match those auto-generated by tblgen. 
- Manually select SDOperand's returned by TryFoldLoad which make up the
  load address.

llvm-svn: 26012
 2006-02-06 06:02:33 +00:00
Evan Cheng
9fb67ea859 Complex pattern isel code shouldn't select nodes. 
llvm-svn: 26010
 2006-02-05 08:45:01 +00:00
Chris Lattner
c0012f8818 Fix the Sparc backend with Evan's recent tblgen changes 
llvm-svn: 26009
 2006-02-05 08:35:50 +00:00
Chris Lattner
da908d19fd This xform isn't safe 
llvm-svn: 26007
 2006-02-05 08:26:16 +00:00
Nate Begeman
2fe9dfedf0 Back out previous commit, it isn't safe. 
llvm-svn: 26006
 2006-02-05 08:23:00 +00:00
Nate Begeman
c0e2bb488a fold c1 << (x + c2) into (c1 << c2) << x. fix a warning. 
llvm-svn: 26005
 2006-02-05 08:07:24 +00:00
Chris Lattner
9898b81e27 some stuff is done 
llvm-svn: 26004
 2006-02-05 07:54:37 +00:00
Chris Lattner
807c68d572 Turn A % (C << N), where C is 2^k, into A & ((C << N)-1) [urem only]. 
Turn A / (C1 << N), where C1 is "1<<C2" into A >> (N+C2) [udiv only].

Tested with: rem.ll:test5, div.ll:test10

llvm-svn: 26003
 2006-02-05 07:54:04 +00:00
Nate Begeman
c93c3d11d6 Handle urem by shifted powers of 2. 
llvm-svn: 26001
 2006-02-05 07:36:48 +00:00
Nate Begeman
0291708a49 handle combining A / (B << N) into A >>u (log2(B)+N) when B is a power of 2 
llvm-svn: 26000
 2006-02-05 07:20:23 +00:00
Evan Cheng
973e4051d6 Use SelectRoot() as the entry to any tblgen based isel. 
llvm-svn: 25998
 2006-02-05 06:51:51 +00:00
Evan Cheng
fb902782e8 Use SelectRoot() as entry of any tblgen based isel. 
llvm-svn: 25997
 2006-02-05 06:46:41 +00:00
Chris Lattner
1d15bef6ac Remove the SparcV8 backend. It has been renamed to be the Sparc backend. 
llvm-svn: 25992
 2006-02-05 06:33:29 +00:00
Chris Lattner
1e16099e9f remove V8 reference 
llvm-svn: 25991
 2006-02-05 06:32:59 +00:00
Evan Cheng
d46a7fc65a * Added SDNode::isOnlyUse(). 
* Fix hasNUsesOfValue(), it should be const.

llvm-svn: 25990
 2006-02-05 06:29:23 +00:00
Chris Lattner
834685ef3a Rename SPARC V8 target to be the LLVM SPARC target. 
llvm-svn: 25985
 2006-02-05 05:50:24 +00:00
Chris Lattner
59378e7675 add a note 
llvm-svn: 25984
 2006-02-05 05:27:35 +00:00
Evan Cheng
c23d3cd6c3 Re-commit the last bit of change that was backed out. 
llvm-svn: 25983
 2006-02-05 05:25:07 +00:00
Chris Lattner
4efafdb7f4 make sure that global doubles are aligned to 8 bytes 
llvm-svn: 25981
 2006-02-05 01:46:49 +00:00
Chris Lattner
74fd4905bc Use getPreferredAlignmentLog. 
llvm-svn: 25980
 2006-02-05 01:45:04 +00:00
Chris Lattner
085a324bfc Use the asmprinter to find out what the preferred alignment of a global is. 
This patch speeds up 172.mgrid from 31.81s to 11.39s on darwin/ppc.
Many many thanks to Nate for tracking down the root cause of the issue.

llvm-svn: 25979
 2006-02-05 01:30:45 +00:00
Chris Lattner
d2c4e9151e Implement the AsmPrinter::getPreferredAlignmentLog method. 
llvm-svn: 25978
 2006-02-05 01:29:18 +00:00
Andrew Lenharth
b28db2290a linkage fix for weak functions 
llvm-svn: 25976
 2006-02-04 19:13:09 +00:00
Jeff Cohen
4f433dafa5 Fix VC++ warning. 
llvm-svn: 25975
 2006-02-04 16:20:31 +00:00
Chris Lattner
e4dc660cbb Use SCEVExpander::InsertCastOfTo instead of our own code. This reduces 
#LLVM LOC, and auto-cse's cast instructions.

llvm-svn: 25974
 2006-02-04 09:52:43 +00:00
Chris Lattner
151eb931ec Pull the InsertCastOfTo out of the header, implement CSE'ing of arguments. 
llvm-svn: 25973
 2006-02-04 09:51:53 +00:00
Chris Lattner
15ab5c6d0c Temporarily revert this patch, which probably breaks with the 
tblgen patch reverted.

llvm-svn: 25971
 2006-02-04 09:24:16 +00:00
Chris Lattner
964e9b66f8 Value# select instructions, allowing -gcse to remove duplicates 
llvm-svn: 25969
 2006-02-04 09:15:29 +00:00
Evan Cheng
6a366c5eda Complex pattern's custom matcher should not call Select() on any operands. 
Select them afterwards if it returns true.

llvm-svn: 25968
 2006-02-04 08:50:49 +00:00
Chris Lattner
0ddab3fc99 Custom lower VAARG for the case when we are doing vaarg(double). In this 
case, the double being loaded may not be 8-byte aligned, so we have to use
our standard bit_convert game.

llvm-svn: 25967
 2006-02-04 08:31:30 +00:00
Chris Lattner
6466bb23bc Fix a nasty typo that broke functions with big stack frames. 
llvm-svn: 25966
 2006-02-04 08:04:21 +00:00
Chris Lattner
bb656b4730 fix a bug in my last checkin 
llvm-svn: 25965
 2006-02-04 07:48:46 +00:00
Chris Lattner
8741126ea7 Fix two significant bugs in LSR: 
1. When rewriting code in outer loops, sometimes we would insert code into
   inner loops that is invariant in that loop.
2. Notice that 4*(2+x) is 8+4*x and use that to simplify expressions.

This is a performance neutral change.

llvm-svn: 25964
 2006-02-04 07:36:50 +00:00
Nate Begeman
ba19f3f93c Remove some stuff that now works 
llvm-svn: 25963
 2006-02-04 07:29:35 +00:00
Chris Lattner
921ddbae1f add a note 
llvm-svn: 25962
 2006-02-04 07:07:31 +00:00
Chris Lattner
3b39e70a72 Two changes: 
1. Treat FMOVD as a copy instruction, to help with coallescing in V9 mode
2. When in V9 mode, insert FMOVD instead of FpMOVD instructions, as we don't
   ever rewrite FpMOVD instructions into FMOVS instructions, thus we just end
   up with commented out copies!
This should fix a bunch of failures in V9 mode on sparc.

llvm-svn: 25961
 2006-02-04 06:58:46 +00:00
Evan Cheng
062ac6e46b Get rid of some memory leaks identified by Valgrind 
llvm-svn: 25960
 2006-02-04 06:49:00 +00:00
Chris Lattner
d8d71c2b6a Let bugpoint work on sparc with v9 instructions enabled. 
llvm-svn: 25958
 2006-02-04 05:02:27 +00:00
Jeff Cohen
291586095d Fix VC++ warning. 
llvm-svn: 25957
 2006-02-04 03:27:39 +00:00
Chris Lattner
013f5fc2fa Add initial support for immediates. This allows us to compile this: 
int %rlwnm(int %A, int %B) {
  %C = call int asm "rlwnm $0, $1, $2, $3, $4", "=r,r,r,n,n"(int %A, int %B, int 4, int 17)
  ret int %C
}

into:

_rlwnm:
        or r2, r3, r3
        or r3, r4, r4
        rlwnm r2, r2, r3, 4, 17    ;; note the immediates :)
        or r3, r2, r2
        blr

llvm-svn: 25955
 2006-02-04 02:26:14 +00:00
Evan Cheng
8fd9fd7866 Remove an unnecessary predicate. 
llvm-svn: 25954
 2006-02-04 02:23:01 +00:00
Evan Cheng
078962656b Separate FILD and FILD_FLAG, the later is only used for SSE2. It produces a 
flag so it can be flagged to a FST.

llvm-svn: 25953
 2006-02-04 02:20:30 +00:00
Chris Lattner
13f609dfe2 Initial early support for non-register operands, like immediates 
llvm-svn: 25952
 2006-02-04 02:16:44 +00:00
Chris Lattner
785771db97 implementation of some methods for inlineasm 
llvm-svn: 25951
 2006-02-04 02:13:02 +00:00
Chris Lattner
08dba8d9f8 Handle another case exposed on X86. 
llvm-svn: 25949
 2006-02-03 23:50:46 +00:00
Chris Lattner
f0ef4b4391 Fix a nasty problem on two-address machines in the following situation: 
store EAX -> [ss#0]
[ss#0] += 1
...
use(EAX)

In this case, it is not valid to rewrite this as:


store EAX -> [ss#0]
EAX += 1
store EAX -> [ss#0]  ;;; this would also delete the store above
...
use(EAX)

... because EAX is not a dead at that point.  Keep track of which registers
we are allowed to clobber, and which ones we aren't, and don't clobber the
ones we're not supposed to.  :)

This should resolve the issues on X86 last night.

llvm-svn: 25948
 2006-02-03 23:28:46 +00:00
Chris Lattner
03b42d7724 significantly simplify the VirtRegMap code by pulling the SpillSlotsAvailable 
and PhysRegsAvailable maps out into a new AvailableSpills struct.  No
functionality change.

This paves the way for a bugfix, coming up next.

llvm-svn: 25947
 2006-02-03 23:13:58 +00:00
Nate Begeman
5a58572b9b Implement some feedback from sabre 
llvm-svn: 25946
 2006-02-03 22:38:07 +00:00
Nate Begeman
2d9838ec9b Add a framework for eliminating instructions that produces undemanded bits. 
llvm-svn: 25945
 2006-02-03 22:24:05 +00:00
Chris Lattner
393e9d10dd add a note 
llvm-svn: 25944
 2006-02-03 22:06:45 +00:00
Chris Lattner
2b82e66f7c another case Nate came up with 
llvm-svn: 25943
 2006-02-03 22:05:41 +00:00
Chris Lattner
6c39bcf741 add a note 
llvm-svn: 25942
 2006-02-03 21:25:23 +00:00
Chris Lattner
47b11a250c remove some #ifdef'd out code, which should properly be in the dag combiner anyway. 
llvm-svn: 25941
 2006-02-03 20:13:59 +00:00
Chris Lattner
366fa6bb83 remove an old comment 
llvm-svn: 25940
 2006-02-03 18:59:39 +00:00
Chris Lattner
782422567b Remove the X86PeepholeOptimizerPass, a truly horrible old hack that is now 
obsolete.  yaay :)

llvm-svn: 25939
 2006-02-03 18:54:24 +00:00
Chris Lattner
70ef21db04 When rewriting frame instructions, emit the appropriate small-immediate 
instruction when possible.

llvm-svn: 25938
 2006-02-03 18:20:04 +00:00
Chris Lattner
255ef92e53 Teach sparc to fold loads/stores into copies. 
Remove the dead getRegClassForType method
minor formating changes.

llvm-svn: 25936
 2006-02-03 07:06:25 +00:00