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2412 Commits

Author SHA1 Message Date
Chris Lattner
b1f716a6d1 PriorityQueue is an instance var, use it. 
llvm-svn: 26632
 2006-03-09 06:48:37 +00:00
Chris Lattner
1d9c1edaa8 add some comments 
llvm-svn: 26631
 2006-03-09 06:37:29 +00:00
Chris Lattner
2dd7bcc95b Refactor the priority mechanism one step further: now that it is a separate 
class, sever its implementation from the interface.  Now we can provide new
implementations of the same interface (priority computation) without touching
the scheduler itself.

llvm-svn: 26630
 2006-03-09 06:35:14 +00:00
Jim Laskey
a1ad999bba Get rid of the multiple copies of getStringValue. Now a Constant:: method. 
llvm-svn: 26616
 2006-03-08 18:11:07 +00:00
Chris Lattner
133ec8c3f0 Split the priority function computation and priority queue management out 
of the ScheduleDAGList class into a new SchedulingPriorityQueue class.

llvm-svn: 26613
 2006-03-08 05:18:27 +00:00
Chris Lattner
46a80382ce switch from an explicitly managed list of SUnits to a simple vector of sunits 
llvm-svn: 26612
 2006-03-08 04:54:34 +00:00
Chris Lattner
427dbaccca Shrinkify some fields, fit to 80 columns 
llvm-svn: 26611
 2006-03-08 04:41:06 +00:00
Chris Lattner
c2fede6ffb revert the previous patch, didn't mean to check it in yet 
llvm-svn: 26610
 2006-03-08 04:39:05 +00:00
Chris Lattner
7965026ed9 remove "Slot", it is dead 
llvm-svn: 26609
 2006-03-08 04:37:58 +00:00
Chris Lattner
3f23d22d3f Change the interface for getting a target HazardRecognizer to be more clean. 
llvm-svn: 26608
 2006-03-08 04:25:59 +00:00
Jim Laskey
aae3375a2b libstdc++-v3 was failing to build. Needed to handle composite types with empty 
members (running into a zero initializer.)

llvm-svn: 26607
 2006-03-08 02:07:02 +00:00
Jim Laskey
91d5ce2531 Use "llvm.metadata" section for debug globals. Filter out these globals in the 
asm printer.

llvm-svn: 26599
 2006-03-07 22:00:35 +00:00
Jim Laskey
eec3faecde Switch to using a numeric id for anchors. 
llvm-svn: 26598
 2006-03-07 20:53:47 +00:00
Jim Laskey
da7873525e Bitfield support. 
llvm-svn: 26593
 2006-03-07 15:51:33 +00:00
Chris Lattner
ced780efee Fix some formatting, when looking for hazards, prefer target nodes over 
things like copyfromreg.

llvm-svn: 26586
 2006-03-07 05:40:43 +00:00
Chris Lattner
86375c060a update file comment 
llvm-svn: 26573
 2006-03-06 17:58:04 +00:00
Evan Cheng
2fad0ea044 Remove some code that doesn't make sense 
llvm-svn: 26572
 2006-03-06 07:31:44 +00:00
Evan Cheng
8fd9503fbd Remove SUnit::Priority1: it is re-calculated on demand as number of live 
range to be generated.

llvm-svn: 26570
 2006-03-06 06:08:54 +00:00
Chris Lattner
c6d1fbab70 Hoist the HazardRecognizer out of the ScheduleDAGList.cpp file to where 
targets can implement them.  Make the top-down scheduler non-g5-specific.

Remove the old testing hazard recognizer.

llvm-svn: 26569
 2006-03-06 00:22:00 +00:00
Chris Lattner
ca7ed30ee6 Comment fixes 
llvm-svn: 26567
 2006-03-05 23:59:20 +00:00
Chris Lattner
101ce8f304 Don't depend on the C99 copysign function, implement it ourselves. 
llvm-svn: 26566
 2006-03-05 23:57:58 +00:00
Chris Lattner
5c28fdcae8 When a hazard recognizer needs noops to be inserted, do so. This represents 
noops as null pointers in the instruction sequence.

llvm-svn: 26564
 2006-03-05 23:51:47 +00:00
Chris Lattner
0ee7522721 Implement G5HazardRecognizer as a trivial thing that wants 5 cycles between 
copyfromreg nodes.  Clearly useful!

llvm-svn: 26559
 2006-03-05 23:13:56 +00:00
Chris Lattner
ccda7ffffd Add basic hazard recognizer support. noop insertion isn't complete yet though. 
llvm-svn: 26558
 2006-03-05 22:45:01 +00:00
Jeff Cohen
578bf37e22 Fix VC++ compilation error. 
llvm-svn: 26554
 2006-03-05 21:43:37 +00:00
Chris Lattner
ef4bef419b Split the list scheduler into top-down and bottom-up pieces. The priority 
function of the top-down scheduler are completely bogus currently, and
having (future) PPC specific in this file is also wrong, but this is a
small incremental step.

llvm-svn: 26552
 2006-03-05 21:10:33 +00:00
Chris Lattner
49ccda9563 Move the available queue to being inside the ListSchedule method, since it 
bounds its lifetime.

llvm-svn: 26550
 2006-03-05 20:21:55 +00:00
Chris Lattner
f2bed5f46e Reinstate this now that the offending opposite xform has been removed. 
llvm-svn: 26548
 2006-03-05 19:53:55 +00:00
Chris Lattner
93ad7177b4 print arbitrary constant pool entries 
llvm-svn: 26545
 2006-03-05 09:38:03 +00:00
Evan Cheng
e0a6cf78f8 Back out fold (shl (add x, c1), c2) -> (add (shl x, c2), c1<<c2) for now. 
It's causing an infinite loop compiling ldecod on x86 / Darwin.

llvm-svn: 26544
 2006-03-05 07:30:16 +00:00
Chris Lattner
827e3f62b0 Add some simple copysign folds 
llvm-svn: 26543
 2006-03-05 05:30:57 +00:00
Chris Lattner
4b4b3e6cbb Codegen copysign[f] into a FCOPYSIGN node 
llvm-svn: 26542
 2006-03-05 05:09:38 +00:00
Chris Lattner
cd57ff4fb6 fold (mul (add x, c1), c2) -> (add (mul x, c2), c1*c2) 
fold (shl (add x, c1), c2) -> (add (shl x, c2), c1<<c2)

This allows us to compile CodeGen/PowerPC/addi-reassoc.ll into:

_test1:
        slwi r2, r4, 4
        add r2, r2, r3
        lwz r3, 36(r2)
        blr
_test2:
        mulli r2, r4, 5
        add r2, r2, r3
        lbz r2, 11(r2)
        extsb r3, r2
        blr

instead of:

_test1:
        addi r2, r4, 2
        slwi r2, r2, 4
        add r2, r3, r2
        lwz r3, 4(r2)
        blr
_test2:
        addi r2, r4, 2
        mulli r2, r2, 5
        add r2, r3, r2
        lbz r2, 1(r2)
        extsb r3, r2
        blr

llvm-svn: 26535
 2006-03-04 23:33:26 +00:00
Jim Laskey
dc6f528739 Added support for dwarf block data entries. 
llvm-svn: 26509
 2006-03-03 21:00:14 +00:00
Jim Laskey
f915b6b08b Adding basic structure support. 
llvm-svn: 26505
 2006-03-03 15:06:57 +00:00
Evan Cheng
4afe769361 Add more vector NodeTypes: VSDIV, VUDIV, VAND, VOR, and VXOR. 
llvm-svn: 26504
 2006-03-03 07:01:07 +00:00
Evan Cheng
4ddc3b2c54 SDOperand::isOperand should not be a forwarding. It must check *this against N's operands. 
llvm-svn: 26502
 2006-03-03 06:42:32 +00:00
Evan Cheng
183b913508 Added isOperand(N): true if this is an operand of N 
llvm-svn: 26501
 2006-03-03 06:24:54 +00:00
Evan Cheng
b91460b269 A bit more tweaking 
llvm-svn: 26500
 2006-03-03 06:23:43 +00:00
Jeff Cohen
ee1a26dc07 Fix VC++ compilation errors. 
llvm-svn: 26498
 2006-03-03 03:25:07 +00:00
Evan Cheng
7d66f13ccf Move #include "llvm/CodeGen/AsmPrinter.h" to top since it's the interface. 
llvm-svn: 26493
 2006-03-03 02:04:29 +00:00
Chris Lattner
999aa36a04 remove the read/write port/io intrinsics. 
llvm-svn: 26479
 2006-03-03 00:19:58 +00:00
Chris Lattner
ab22220755 Split memcpy/memset/memmove intrinsics into i32/i64 versions, resolving 
PR709, and paving the way for future progress.

llvm-svn: 26476
 2006-03-03 00:00:25 +00:00
Evan Cheng
71fa36ef12 - Fixed some priority calculation bugs that were causing bug 478. Among them: 
a predecessor appearing more than once in the operand list was counted as
  multiple predecessor; priority1 should be updated during scheduling;
  CycleBound was updated after the node is inserted into priority queue; one
  of the tie breaking condition was flipped.
- Take into consideration of two address opcodes. If a predecessor is a def&use
  operand, it should have a higher priority.
- Scheduler should also favor floaters, i.e. nodes that do not have real
  predecessors such as MOV32ri.
- The scheduling fixes / tweaks fixed bug 478:
        .text
        .align  4
        .globl  _f
_f:
        movl 4(%esp), %eax
        movl 8(%esp), %ecx
        movl %eax, %edx
        imull %ecx, %edx
        imull %eax, %eax
        imull %ecx, %ecx
        addl %eax, %ecx
        leal (%ecx,%edx,2), %eax
        ret

  It is also a slight performance win (1% - 3%) for most tests.

llvm-svn: 26470
 2006-03-02 21:38:29 +00:00
Jim Laskey
7ee6df939e Support for enumerations. 
llvm-svn: 26466
 2006-03-01 23:52:37 +00:00
Evan Cheng
e99e63bfc8 Don't print llvm constant in assmebly file. Assembler won't like comments that 
span multiple lines.

llvm-svn: 26463
 2006-03-01 22:18:09 +00:00
Chris Lattner
d45d3b68b0 Fix CodeGen/Generic/2006-03-01-dagcombineinfloop.ll, an infinite loop 
in the dag combiner on 176.gcc on x86.

llvm-svn: 26459
 2006-03-01 21:47:21 +00:00
Jim Laskey
c73a56236e Switch back to using actual dwarf tags. Simplifies code without loss to other 
debug forms.

llvm-svn: 26455
 2006-03-01 20:39:36 +00:00
Chris Lattner
5544c94289 Fix a typo evan noticed 
llvm-svn: 26454
 2006-03-01 19:55:35 +00:00
Jim Laskey
09c0bfcbaf Use context and not compile unit. 
llvm-svn: 26453
 2006-03-01 18:20:30 +00:00
Jim Laskey
d614a770a6 I guess I can handle large type sizes. 
llvm-svn: 26452
 2006-03-01 18:13:05 +00:00
Jim Laskey
08fa0d0d99 Basic array support. 
llvm-svn: 26451
 2006-03-01 17:53:02 +00:00
Chris Lattner
6434a21c21 Add support for target-specific dag combines 
llvm-svn: 26443
 2006-03-01 04:53:38 +00:00
Chris Lattner
f571b8c5dd Add a new AddToWorkList method, start using it 
llvm-svn: 26441
 2006-03-01 04:03:14 +00:00
Chris Lattner
7ba1c5e025 Pull shifts by a constant through multiplies (a form of reassociation), 
implementing Regression/CodeGen/X86/mul-shift-reassoc.ll

llvm-svn: 26440
 2006-03-01 03:44:24 +00:00
Evan Cheng
d8b92e04a2 Vector ops lowering. 
llvm-svn: 26436
 2006-03-01 01:09:54 +00:00
Evan Cheng
2cbf9d93d3 - Added VConstant as an abstract version of ConstantVec. 
- All abstrct vector nodes must have # of elements and element type as their
first two operands.

llvm-svn: 26432
 2006-03-01 00:51:13 +00:00
Jim Laskey
090da116cc Add const, volatile, restrict support. 
Add array of debug descriptor support.

llvm-svn: 26428
 2006-02-28 20:15:07 +00:00
Chris Lattner
3aa1cd759e Compile: 
unsigned foo4(unsigned short *P) { return *P & 255; }
unsigned foo5(short *P) { return *P & 255; }

to:

_foo4:
        lbz r3,1(r3)
        blr
_foo5:
        lbz r3,1(r3)
        blr

not:

_foo4:
        lhz r2, 0(r3)
        rlwinm r3, r2, 0, 24, 31
        blr
_foo5:
        lhz r2, 0(r3)
        rlwinm r3, r2, 0, 24, 31
        blr

llvm-svn: 26419
 2006-02-28 06:49:37 +00:00
Chris Lattner
24a22066c4 Fold "and (LOAD P), 255" -> zextload. This allows us to compile: 
unsigned foo3(unsigned *P) { return *P & 255; }
as:
_foo3:
        lbz r3, 3(r3)
        blr

instead of:

_foo3:
        lwz r2, 0(r3)
        rlwinm r3, r2, 0, 24, 31
        blr

and:

unsigned short foo2(float a) { return a; }

as:
_foo2:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lhz r3, -2(r1)
        blr

instead of:

_foo2:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        rlwinm r3, r2, 0, 16, 31
        blr

llvm-svn: 26417
 2006-02-28 06:35:35 +00:00
Chris Lattner
152201257d fold (sra (sra x, c1), c2) -> (sra x, c1+c2) 
llvm-svn: 26416
 2006-02-28 06:23:04 +00:00
Chris Lattner
a451b5ffd4 Add support for output memory constraints. 
llvm-svn: 26410
 2006-02-27 23:45:39 +00:00
Jim Laskey
cb47e213c0 Qualify dwarf namespace inside llvm namespace. 
llvm-svn: 26409
 2006-02-27 22:37:23 +00:00
Jim Laskey
34708479e7 Partial enabling of functions. 
llvm-svn: 26404
 2006-02-27 20:37:42 +00:00
Jim Laskey
618fe7bec1 Supporting multiple compile units. 
llvm-svn: 26402
 2006-02-27 17:27:12 +00:00
Jim Laskey
939d2084ad Re-orging file. 
llvm-svn: 26401
 2006-02-27 12:43:29 +00:00
Chris Lattner
baea29f33d remove some completed notes 
llvm-svn: 26390
 2006-02-27 00:39:31 +00:00
Evan Cheng
5abf5b2ce4 Print ConstantPoolSDNode offset field. 
llvm-svn: 26381
 2006-02-26 08:36:57 +00:00
Evan Cheng
026fd6af96 Added an offset field to ConstantPoolSDNode. 
llvm-svn: 26371
 2006-02-25 09:54:52 +00:00
Chris Lattner
4f083f08ca Fix a bug that Evan exposed with some changes he's making, and that was 
exposed with a fastcc problem (breaking pcompress2 on x86 with -enable-x86-fastcc).

When reloading a reused reg, make sure to invalidate the reloaded reg, and
check to see if there are any other pending uses of the same register.

llvm-svn: 26369
 2006-02-25 02:17:31 +00:00
Chris Lattner
b06aa63852 Remove debugging printout :) 
Add a minor compile time win, no codegen change.

llvm-svn: 26368
 2006-02-25 02:03:40 +00:00
Chris Lattner
a342126820 Refactor some code from being inline to being out in a new class with methods. 
This gets rid of two gotos, which is always nice, and also adds some comments.

No functionality change, this is just a refactor.

llvm-svn: 26367
 2006-02-25 01:51:33 +00:00
Chris Lattner
e2b0023f4e Use the PrintAsmMemoryOperand to print addressing modes. 
llvm-svn: 26364
 2006-02-24 20:21:58 +00:00
Chris Lattner
22356863a0 Pass all the flags to the asm printer, not just the # operands. 
llvm-svn: 26362
 2006-02-24 19:50:58 +00:00
Chris Lattner
f1e0c1f0a8 rename NumOps -> NumVals to avoid shadowing a NumOps var in an outer scope. 
Add support for addressing modes.

llvm-svn: 26361
 2006-02-24 19:18:20 +00:00
Chris Lattner
e00cf77ecb Refactor operand adding out to a new AddOperand method 
llvm-svn: 26358
 2006-02-24 18:54:03 +00:00
Jim Laskey
fe79552c25 Add pointer and reference types. Added short-term code to ignore NULL types 
(to allow llvm-gcc4 to build.)

llvm-svn: 26355
 2006-02-24 16:46:40 +00:00
Jeff Cohen
9773f9c447 Get VC++ building again. 
llvm-svn: 26351
 2006-02-24 02:52:40 +00:00
Chris Lattner
6248339a24 Implement (most of) selection of inline asm memory operands. 
llvm-svn: 26350
 2006-02-24 02:13:54 +00:00
Chris Lattner
3f267c1683 Lower C_Memory operands. 
llvm-svn: 26346
 2006-02-24 01:11:24 +00:00
Jim Laskey
ddac333e72 Added basic support for typedefs. 
llvm-svn: 26339
 2006-02-23 22:37:30 +00:00
Chris Lattner
5a70e894d1 Fix an endianness problem on big-endian targets with expanded operands 
to inline asms.  Mark some methods const.

llvm-svn: 26334
 2006-02-23 20:06:57 +00:00
Chris Lattner
b4951fbe82 Record all of the expanded registers in the DAG and machine instr, fixing 
several bugs in inline asm expanded operands.

llvm-svn: 26332
 2006-02-23 19:21:04 +00:00
Jim Laskey
1ee7e91e5c DwarfWriter reading basic type information from llvm-gcc4 code. 
llvm-svn: 26331
 2006-02-23 16:58:18 +00:00
Chris Lattner
b74e255d8b Code cleanups, no functionality change 
llvm-svn: 26328
 2006-02-23 06:44:17 +00:00
Chris Lattner
2fc133f091 This fixes a couple of problems with expansion 
llvm-svn: 26318
 2006-02-22 23:09:03 +00:00
Chris Lattner
d1886b8a4e Change a whole bunch of code to be built around RegsForValue instead of 
a single register number.  This fully implements promotion for inline asms,
expand is close but not quite right yet.

llvm-svn: 26316
 2006-02-22 22:37:12 +00:00
Jim Laskey
b62a583c99 Coordinate activities with llvm-gcc4 and dwarf. 
llvm-svn: 26314
 2006-02-22 19:02:11 +00:00
Chris Lattner
6bb2c3e9cd split register class handling from explicit physreg handling. 
llvm-svn: 26308
 2006-02-22 00:56:39 +00:00
Chris Lattner
b5b7cc99c4 Adjust to changes in getRegForInlineAsmConstraint prototype 
llvm-svn: 26306
 2006-02-21 23:12:12 +00:00
Evan Cheng
6a9422ce1c Added x86 integer vector types: 64-bit packed byte integer (v16i8), 64-bit 
packed word integer (v8i16), and 64-bit packed doubleword integer (v2i32).

llvm-svn: 26294
 2006-02-20 22:34:53 +00:00
Chris Lattner
4b5130d957 Fix a problem Nate and Duraid reported where simplifying nodes can cause 
them to get ressurected, in which case, deleting the undead nodes is
unfriendly.

llvm-svn: 26291
 2006-02-20 06:51:04 +00:00
Chris Lattner
d5b8bfef65 Fix a problem on itanium with memset. The value to set has been promoted to 
i64 before this code, so zero_ext doesn't work.

llvm-svn: 26290
 2006-02-20 06:38:35 +00:00
Nate Begeman
bbcae2bf3d Add checks to make sure we don't create bogus extend nodes, and fix a bug 
where we were doing exactly that which was causing failures on x86 and
alpha.

llvm-svn: 26284
 2006-02-18 02:40:58 +00:00
Chris Lattner
bd36f029ef Fix a tricky issue in the SimplifyDemandedBits code where CombineTo wasn't 
exactly the API we wanted to call into.  This fixes the crash on crafty last
night.

llvm-svn: 26269
 2006-02-17 21:58:01 +00:00
Nate Begeman
7ebd8fd80d Clean up DemandedBitsAreZero interface 
Make more use of the new mask helpers in valuetypes.h
Combine (sra (srl x, c1), c1) -> sext_inreg if legal

llvm-svn: 26263
 2006-02-17 19:54:08 +00:00
Nate Begeman
a3a0a0340f Don't expand sdiv by power of two before legalize, since it will likely 
generate illegal nodes.

llvm-svn: 26261
 2006-02-17 07:26:20 +00:00
Nate Begeman
9c0ab71f4a kill ADD_PARTS & SUB_PARTS and replace them with fancy new ADDC, ADDE, SUBC 
and SUBE nodes that actually expose what's going on and allow for
significant simplifications in the targets.

llvm-svn: 26255
 2006-02-17 05:43:56 +00:00
Chris Lattner
6632b8ab04 Fix another miscompilation exposed by lencode, where we lowered i64->f32 
conversions to __floatdidf instead of __floatdisf on targets that support
f32 but not i64 (e.g. sparc).

llvm-svn: 26254
 2006-02-17 04:32:33 +00:00
Evan Cheng
a2433f32b4 Dumb bug. Code sees a memcpy from X+c so it increments src offset. But it 
turns out not to point to a constant string but it forgot change the offset
back.

llvm-svn: 26242
 2006-02-16 23:11:42 +00:00
Nate Begeman
0bc71999b9 Rework the SelectionDAG-based implementations of SimplifyDemandedBits 
and ComputeMaskedBits to match the new improved versions in instcombine.
Tested against all of multisource/benchmarks on ppc.

llvm-svn: 26238
 2006-02-16 21:11:51 +00:00
Evan Cheng
131901cbb8 If the false case is the current basic block, then this is a self loop. 
We do not want to emit "Loop: ... brcond Out; br Loop", as it adds an extra
instruction in the loop.  Instead, invert the condition and emit
"Loop: ... br!cond Loop; br Out.

Generalize the fix by moving it from PPCDAGToDAGISel to SelectionDAGLowering.

llvm-svn: 26231
 2006-02-16 08:27:56 +00:00
Chris Lattner
6f407a54c1 Lowering of sdiv X, pow2 was broken, this fixes it. This patch is written 
by Nate, I'm just committing it for him.

llvm-svn: 26230
 2006-02-16 08:02:36 +00:00
Evan Cheng
07063456aa Remove an unused function parameter. 
llvm-svn: 26221
 2006-02-15 22:12:35 +00:00
Evan Cheng
5c2ecfd29b Turn a memcpy from string constant into a series of stores of constant values. 
llvm-svn: 26219
 2006-02-15 21:59:04 +00:00
Jim Laskey
e51152ac31 Should not combine ISD::LOCATIONs until we have scheme to remove from 
MachineDebugInfo tables.

llvm-svn: 26216
 2006-02-15 19:34:44 +00:00
Evan Cheng
3f9201ab48 Lower memcpy with small constant size operand into a series of load / store 
ops.

llvm-svn: 26195
 2006-02-15 01:54:51 +00:00
Evan Cheng
6789a748ac Doh again! 
llvm-svn: 26188
 2006-02-14 23:05:54 +00:00
Jim Laskey
bb6d481323 Using wrong DW_FORM. 
llvm-svn: 26184
 2006-02-14 22:01:57 +00:00
Evan Cheng
5a2a9d3896 Keep to < 80 cols 
llvm-svn: 26177
 2006-02-14 20:12:38 +00:00
Evan Cheng
8937c047b3 Missed a break so memcpy cases fell through to memset. Doh. 
llvm-svn: 26176
 2006-02-14 19:45:56 +00:00
Evan Cheng
57eebe8ab4 Fixed a build breakage. 
llvm-svn: 26175
 2006-02-14 09:11:59 +00:00
Evan Cheng
f6c74c0096 Rename maxStoresPerMemSet to maxStoresPerMemset, etc. 
llvm-svn: 26174
 2006-02-14 08:38:30 +00:00
Evan Cheng
0bfe83eb5b Expand memset dst, c, size to a series of stores if size falls below the 
target specific theshold, e.g. 16 for x86.

llvm-svn: 26171
 2006-02-14 08:22:34 +00:00
Chris Lattner
47f4f2c148 now that libcalls don't suck, we can remove this hack 
llvm-svn: 26164
 2006-02-14 05:39:35 +00:00
Chris Lattner
d3cfbeca5b Fix a latent bug in the call sequence handling stuff. Some targets (e.g. x86) 
create these nodes with flag results.  Remember that we legalized them.

llvm-svn: 26156
 2006-02-14 00:55:02 +00:00
Jim Laskey
fac853338f Rename to better reflect usage (current and planned.) 
llvm-svn: 26145
 2006-02-13 12:50:39 +00:00
Chris Lattner
b3fc3e3a90 Completely rewrite libcall insertion by the legalizer, providing the 
following handy-dandy properties:

1. it is always correct now
2. it is much faster than before
3. it is easier to understand

This implementation builds off of the recent simplifications of the
legalizer that made it single-pass instead of iterative.

This fixes JM/lencod, JM/ldecod, and
CodeGen/Generic/2006-02-12-InsertLibcall.ll (at least on PPC).

llvm-svn: 26144
 2006-02-13 09:18:02 +00:00
Jim Laskey
55467f611d Reorg for integration with gcc4. Old style debug info will not be passed though 
to SelIDAG.

llvm-svn: 26115
 2006-02-11 01:01:30 +00:00
Evan Cheng
7441e03b0b Added SelectionDAG::InsertISelMapEntry(). This is used to workaround the gcc 
problem where it inline the map insertion call too aggressively. Before this
change it was producing a frame size of 24k for Select_store(), now it's down
to 10k (by calling this method rather than calling the map insertion operator).

llvm-svn: 26094
 2006-02-09 22:11:03 +00:00
Evan Cheng
3486292b7d More changes to reduce frame size. 
Move all getTargetNode() out of SelectionDAG.h into SelectionDAG.cpp. This
prevents them from being inlined.
Change getTargetNode() so they return SDNode * instead of SDOperand to prevent
copying. It should also help compilation speed.

llvm-svn: 26083
 2006-02-09 07:15:23 +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
6556f15ad8 Add support for assembler directives that wrap inline asm 
llvm-svn: 26065
 2006-02-08 23:41:56 +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
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
Jim Laskey
e27947e8fb Changing model for the construction of debug information. 
llvm-svn: 26016
 2006-02-06 15:33:21 +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
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
d46a7fc65a * Added SDNode::isOnlyUse(). 
* Fix hasNUsesOfValue(), it should be const.

llvm-svn: 25990
 2006-02-05 06:29:23 +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
d2c4e9151e Implement the AsmPrinter::getPreferredAlignmentLog method. 
llvm-svn: 25978
 2006-02-05 01:29:18 +00:00
Jeff Cohen
4f433dafa5 Fix VC++ warning. 
llvm-svn: 25975
 2006-02-04 16:20:31 +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
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
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
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
2d9838ec9b Add a framework for eliminating instructions that produces undemanded bits. 
llvm-svn: 25945
 2006-02-03 22:24:05 +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
541258d077 remove dead fn 
llvm-svn: 25935
 2006-02-03 06:51:34 +00:00
Nate Begeman
78c9e14249 Add common code for reassociating ops in the dag combiner 
llvm-svn: 25934
 2006-02-03 06:46:56 +00:00