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21192 Commits

Author SHA1 Message Date
Bill Wendling
92d8ff0471 Machine LICM will check that operands are defined outside of the loop. Also 
check that register isn't 0 before going further.

llvm-svn: 45498
 2008-01-02 21:10:40 +00:00
Bill Wendling
005b47c20c Remove dead code. 
llvm-svn: 45496
 2008-01-02 20:47:37 +00:00
Chris Lattner
4a0d9c7836 darwin9 and above support aligned common symbols. 
llvm-svn: 45494
 2008-01-02 19:44:55 +00:00
Chris Lattner
abd12447f8 leopard and above support alignment for common symbols. 
llvm-svn: 45493
 2008-01-02 19:35:16 +00:00
Bill Wendling
5843183ca2 Use the new architecture to get the containing machine basic block for a machine 
instruction. Also, use "splice" to move the new instruction instead of
remove/insert (where it was leaking memory anyway).

llvm-svn: 45492
 2008-01-02 19:32:43 +00:00
Nick Lewycky
ea4de32234 Don't be rude, emit debugging info where asked to. 
llvm-svn: 45485
 2008-01-02 02:49:20 +00:00
Owen Anderson
e6856128ab Move some more instruction creation methods from RegisterInfo into InstrInfo. 
llvm-svn: 45484
 2008-01-01 21:11:32 +00:00
Chris Lattner
fc976a38ff Make MachineRegisterInfo::getVRegDef more efficient by aiming the keep the def of the vreg at the start of the list, so the list doesn't need to be traversed. 
llvm-svn: 45483
 2008-01-01 21:08:22 +00:00
Chris Lattner
490a9681cb switch the register iterator to act more like hte LLVM value iterator: dereferencing 
it now returns the machineinstr of the use.  To get the operand, use I.getOperand().

Add a new MachineRegisterInfo::replaceRegWith, which is basically like
Value::replaceAllUsesWith.

llvm-svn: 45482
 2008-01-01 20:36:19 +00:00
Gordon Henriksen
d2485b2cec Adding C bindings for SwitchInst::addCase. 
Patch by Bryan O'Sullivan!

llvm-svn: 45481
 2008-01-01 05:50:53 +00:00
Chris Lattner
7091807c2d Add a trivial but handy function to efficiently return the machine 
instruction that defines the specified vreg.  Crazy.

llvm-svn: 45480
 2008-01-01 03:07:29 +00:00
Chris Lattner
39b56ec51b Implement automatically updated def/use lists for all MachineInstr register 
operands.  The lists are currently kept in MachineRegisterInfo, but it does
not yet provide an iterator interface to them.

llvm-svn: 45477
 2008-01-01 01:12:31 +00:00
Chris Lattner
04a35e9a8c Fix a bug in my previous patch: refer to the impl not the pure virtual version. It's unclear why gcc would ever compile this... 
llvm-svn: 45476
 2008-01-01 01:05:34 +00:00
Chris Lattner
1285ec2ae7 Fix a problem where lib/Target/TargetInstrInfo.h would include and use 
a header file from libcodegen.  This violates a layering order: codegen
depends on target, not the other way around.  The fix to this is to 
split TII into two classes, TII and TargetInstrInfoImpl, which defines
stuff that depends on libcodegen.  It is defined in libcodegen, where 
the base is not.

llvm-svn: 45475
 2008-01-01 01:03:04 +00:00
Duncan Sands
8a4882564a Fix PR1833 - eh.exception and eh.selector return two 
values, which means doing extra legalization work.
It would be easier to get this kind of thing right if
there was some documentation...

llvm-svn: 45472
 2007-12-31 18:35:50 +00:00
Owen Anderson
ae7e2c1e03 Move copyRegToReg from MRegisterInfo to TargetInstrInfo. This is part of the 
Machine-level API cleanup instigated by Chris.

llvm-svn: 45470
 2007-12-31 06:32:00 +00:00
Chris Lattner
d8b7ecd871 properly encapsulate the parent field of MBB and MI with get/set accessors. 
llvm-svn: 45469
 2007-12-31 04:56:33 +00:00
Chris Lattner
de54e62962 update a couple of references to SSARegMap. 
llvm-svn: 45468
 2007-12-31 04:16:08 +00:00
Chris Lattner
96167aa93c Rename SSARegMap -> MachineRegisterInfo in keeping with the idea 
that "machine" classes are used to represent the current state of
the code being compiled.  Given this expanded name, we can start 
moving other stuff into it.  For now, move the UsedPhysRegs and
LiveIn/LoveOuts vectors from MachineFunction into it.

Update all the clients to match.

This also reduces some needless #includes, such as MachineModuleInfo
from MachineFunction.

llvm-svn: 45467
 2007-12-31 04:13:23 +00:00
Chris Lattner
9e5cc35593 Add new shorter predicates for testing machine operands for various types: 
e.g. MO.isMBB() instead of MO.isMachineBasicBlock().  I don't plan on 
switching everything over, so new clients should just start using the 
shorter names.

Remove old long accessors, switching everything over to use the short
accessor: getMachineBasicBlock() -> getMBB(), 
getConstantPoolIndex() -> getIndex(), setMachineBasicBlock -> setMBB(), etc.

llvm-svn: 45464
 2007-12-30 23:10:15 +00:00
Chris Lattner
7504adbd72 More cleanups for MachineOperand: 
- Eliminate the static "print" method for operands, moving it
    into MachineOperand::print.
  - Change various set* methods for register flags to take a bool
    for the value to set it to.  Remove unset* methods.
  - Group methods more logically by operand flavor in MachineOperand.h

llvm-svn: 45461
 2007-12-30 21:56:09 +00:00
Chris Lattner
7d47b6c164 MachineOperand: 
- Add getParent() accessors.
  - Move SubReg out of the AuxInfo union, to make way for future changes.
  - Remove the getImmedValue/setImmedValue methods.
  - in some MachineOperand::Create* methods, stop initializing fields that are dead.

MachineInstr:
  - Delete one copy of the MachineInstr printing code, now there is only one dump
    format and one copy of the code.
  - Make MachineOperand use the parent field to get info about preg register names if
    no target info is otherwise available.
  - Move def/use/kill/dead flag printing to the machineoperand printer, so they are
    always printed for an operand.

llvm-svn: 45460
 2007-12-30 21:31:53 +00:00
Chris Lattner
f3f074dfdd fix typo duncan noticed! 
llvm-svn: 45459
 2007-12-30 21:21:10 +00:00
Chris Lattner
31932a7542 simpilfy some register printing code. 
llvm-svn: 45458
 2007-12-30 21:08:36 +00:00
Chris Lattner
46e4658c95 eliminate a copy of the machineoperand printing stuff. Keep the copy that 
knows how to print offsets.

llvm-svn: 45457
 2007-12-30 21:03:30 +00:00
Chris Lattner
ff61fe680e Simplify and clean up some machine operand/instr printing/dumping stuff. 
llvm-svn: 45456
 2007-12-30 21:01:27 +00:00
Chris Lattner
98c3fabf47 two register machineoperands are not identical unless their subregs match. 
llvm-svn: 45455
 2007-12-30 20:55:08 +00:00
Chris Lattner
4a4943a78f MachineOperand::getImmedValue -> MachineOperand::getImm 
llvm-svn: 45454
 2007-12-30 20:50:28 +00:00
Chris Lattner
12477d46b4 Use MachineOperand::getImm instead of MachineOperand::getImmedValue. Likewise setImmedValue -> setImm 
llvm-svn: 45453
 2007-12-30 20:49:49 +00:00
Gordon Henriksen
8082358f86 Add some doxygen comments to llvm-c/Core.h. 
llvm-svn: 45450
 2007-12-30 17:46:33 +00:00
Chris Lattner
d6051f028d make machine operands fatter: give each one an up-pointer to the 
machineinstr that owns it.

llvm-svn: 45449
 2007-12-30 06:11:04 +00:00
Bill Wendling
4c22e299ef If we have a load of a global address that's not modified during the 
function, then go ahead and hoist it out of the loop. This is the result:

$ cat a.c
volatile int G;

int A(int N) {
  for (; N > 0; --N)
    G++;
}
$ llc -o - -relocation-model=pic
_A:
...
LBB1_2: # bb
        movl    L_G$non_lazy_ptr-"L1$pb"(%eax), %esi
        incl    (%esi)
        incl    %edx
        cmpl    %ecx, %edx
        jne     LBB1_2  # bb
...
$ llc -o - -relocation-model=pic -machine-licm
_A:
...
        movl    L_G$non_lazy_ptr-"L1$pb"(%eax), %eax
LBB1_2: # bb
        incl    (%eax)
        incl    %edx
        cmpl    %ecx, %edx
        jne     LBB1_2  # bb
...

I'm limiting this to the MOV32rm x86 instruction for now.

llvm-svn: 45444
 2007-12-30 03:18:58 +00:00
Chris Lattner
fac8748ca7 use simplified operand addition methods. 
llvm-svn: 45437
 2007-12-30 01:01:54 +00:00
Chris Lattner
c2f0543beb use simplified operand addition methods. 
llvm-svn: 45436
 2007-12-30 00:57:42 +00:00
Chris Lattner
1b0ad80f53 use simplified operand addition methods. 
llvm-svn: 45435
 2007-12-30 00:51:11 +00:00
Chris Lattner
4d0361fbf2 Shrinkify the machine operand creation method names. 
llvm-svn: 45433
 2007-12-30 00:45:46 +00:00
Chris Lattner
19dd6c4eac Start using the simplified methods for adding operands. 
llvm-svn: 45432
 2007-12-30 00:41:17 +00:00
Chris Lattner
e868c77f16 simplify some code by factoring operand construction better. 
llvm-svn: 45428
 2007-12-30 00:12:25 +00:00
Chris Lattner
ad9a6ccb83 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Chris Lattner
8193d4af33 remove attribution from lib Makefiles. 
llvm-svn: 45415
 2007-12-29 20:09:26 +00:00
Chris Lattner
d82b30a996 this is done. 
llvm-svn: 45408
 2007-12-29 19:38:02 +00:00
Chris Lattner
d55e743cfe One readme entry is done, one is really easy (Evan, want to investigate 
eliminating the llvm.x86.sse2.loadl.pd intrinsic?), one shuffle optzn
may be done (if shufps is better than pinsw, Evan, please review), and
we already know about LICM of simple instructions.

llvm-svn: 45407
 2007-12-29 19:31:47 +00:00
Chris Lattner
cd147e5596 Fold comparisons against a constant nan, and optimize ORD/UNORD 
comparisons with a constant.  This allows us to compile isnan to:

_foo:
	fcmpu cr7, f1, f1
	mfcr r2
	rlwinm r3, r2, 0, 31, 31
	blr 

instead of:

LCPI1_0:					;  float
	.space	4
_foo:
	lis r2, ha16(LCPI1_0)
	lfs f0, lo16(LCPI1_0)(r2)
	fcmpu cr7, f1, f0
	mfcr r2
	rlwinm r3, r2, 0, 31, 31
	blr 

llvm-svn: 45405
 2007-12-29 08:37:08 +00:00
Chris Lattner
b36a4a7a84 this xform is implemented. 
llvm-svn: 45404
 2007-12-29 08:19:39 +00:00
Christopher Lamb
dfad5f19b4 Disable null pointer folding transforms for non-generic address spaces. This should probably be a target-specific predicate based on address space. That way for targets where this isn't applicable the predicate can be optimized away. 
llvm-svn: 45403
 2007-12-29 07:56:53 +00:00
Chris Lattner
38687aa2b2 make sure not to zap volatile stores, thanks a lot to Dale for noticing this! 
llvm-svn: 45402
 2007-12-29 07:15:45 +00:00
Chris Lattner
f8e408b7b1 Codegen: 
as:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstps	(%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

instead of:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstpl	(%esi)
	cvtsd2ss	(%esi), %xmm0
	movss	%xmm0, (%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

llvm-svn: 45401
 2007-12-29 06:57:38 +00:00
Chris Lattner
78ae7ff876 don't fold fp_round(fp_extend(load)) -> fp_round(extload) 
llvm-svn: 45400
 2007-12-29 06:55:23 +00:00
Chris Lattner
e3515220d2 avoid going through a stack slot to convert from fpstack to xmm reg 
if we are just going to store it back anyway.  This improves things 
like:
double foo();
void bar(double *P) { *P = foo(); }

llvm-svn: 45399
 2007-12-29 06:41:28 +00:00
Chris Lattner
7cb2de8e48 Delete a store whose input is a load from the same pointer: 
x = load p
  store x -> p

llvm-svn: 45398
 2007-12-29 06:26:16 +00:00
Chris Lattner
ac72965e02 add a note 
llvm-svn: 45397
 2007-12-29 05:51:58 +00:00
Chris Lattner
78c7878ca4 expand note. 
llvm-svn: 45393
 2007-12-29 01:05:01 +00:00
Chris Lattner
2369d2f4ab dead calls to llvm.stacksave can be deleted, even though they 
have potential side-effects.

llvm-svn: 45392
 2007-12-29 00:59:12 +00:00
Chris Lattner
b8e060f7a6 add a note. 
llvm-svn: 45388
 2007-12-28 22:30:05 +00:00
Chris Lattner
2248a22bda add a note. 
llvm-svn: 45387
 2007-12-28 21:50:40 +00:00
Owen Anderson
ebd3e9c500 Repair a transform that Chris noticed a bug in. Thanks to Nicholas for pointing out my stupid mistakes when writing this patch. :-) 
llvm-svn: 45384
 2007-12-28 07:42:12 +00:00
Chris Lattner
2456399ce5 disable this instcombine xform, it miscompiles: 
define i32 @main() {
entry:
	%z = alloca i32		; <i32*> [#uses=2]
	store i32 0, i32* %z
	%tmp = load i32* %z		; <i32> [#uses=1]
	%sub = sub i32 %tmp, 1		; <i32> [#uses=1]
	%cmp = icmp ult i32 %sub, 0		; <i1> [#uses=1]
	%retval = select i1 %cmp, i32 1, i32 0		; <i32> [#uses=1]
	ret i32 %retval
}

into ret 1, instead of ret 0.

Christopher, please investigate.

llvm-svn: 45383
 2007-12-28 06:24:31 +00:00
Chris Lattner
e53df84267 add a note 
llvm-svn: 45377
 2007-12-28 04:42:05 +00:00
Anton Korobeynikov
f12327cd32 Ignore functions with internal linkages during linking. This snipped mimics the 
behaviour of LinkGlobals() function.

llvm-svn: 45375
 2007-12-27 23:21:57 +00:00
Gordon Henriksen
86e98275ff Adding bindings for target triple and data layout. 
llvm-svn: 45369
 2007-12-27 20:13:47 +00:00
Gordon Henriksen
d96b3222e5 Switch the bindings to use LLVMFoldingBuilder. 
llvm-svn: 45367
 2007-12-27 18:25:59 +00:00
Gordon Henriksen
90d48b077d Fixing several transforms which would drop the collector attribute 
when copying functions.

llvm-svn: 45356
 2007-12-25 22:16:06 +00:00
Chris Lattner
90df7f7424 Don't break critical edges for single-bb loops, this helps with PR1877, though 
it is only a partial fix.  This change is noise for most programs, but
speeds up Shootout-C++/matrix by 20%, Ptrdist/ks by 24%, smg2000 by 8%,
hexxagon by 9%, bzip2 by 9% (not sure I trust this), ackerman by 13%, etc.

OTOH, it slows down Shootout/fib2 by 40% (I'll update PR1877 with this info).

llvm-svn: 45354
 2007-12-25 19:06:45 +00:00
Gordon Henriksen
c0a3899bbf GC poses hazards to the inliner. Consider: 
define void @f() {
            ...
            call i32 @g()
            ...
    }

    define void @g() {
            ...
    }

The hazards are:

  - @f and @g have GC, but they differ GC. Inlining is invalid. This
    may never occur.
  - @f has no GC, but @g does. g's GC must be propagated to @f.

The other scenarios are safe:

  - @f and @g have the same GC.
  - @f and @g have no GC.
  - @g has no GC.

This patch adds inliner checks for the former two scenarios.

llvm-svn: 45351
 2007-12-25 03:10:07 +00:00
Gordon Henriksen
a9f4ed4070 Noting and enforcing that GC intrinsics are valid only within a 
function with GC.

This will catch the error when the inliner inlines a function with
GC into a caller with no GC.

llvm-svn: 45350
 2007-12-25 02:31:26 +00:00
Gordon Henriksen
44841db057 Adjusting verification of "llvm.gc*" intrinsic prototypes to match 
LangRef.

llvm-svn: 45349
 2007-12-25 02:02:10 +00:00
Owen Anderson
1064e276a9 Flesh out the Briggs implementation a little bit more, fix a few FIXMEs. 
llvm-svn: 45347
 2007-12-24 22:12:23 +00:00
Chris Lattner
7e1e1f2933 add a -backedge-hack llc-beta option to codegenprepare. 
When specified, don't split backedges of single-bb loops.
This helps address PR1877

llvm-svn: 45344
 2007-12-24 19:32:55 +00:00
Chris Lattner
232e097cff add a simple hack 
llvm-svn: 45343
 2007-12-24 19:27:46 +00:00
Anton Korobeynikov
a0113f6c70 Cygwin defines uint32_t as unsigned long. Unbreak call to std::min in this case 
llvm-svn: 45342
 2007-12-24 11:16:47 +00:00
Gordon Henriksen
3e409a37ac Setting GlobalDirective in TargetAsmInfo by default rather than 
providing a misleading facility. It's used once in the MIPS backend
and hardcoded as "\t.globl\t" everywhere else.

llvm-svn: 45338
 2007-12-23 20:58:16 +00:00
Gordon Henriksen
606ac32019 C and Ocaml bindings for ExecutionEngine (i.e., the JIT compiler). 
llvm-svn: 45335
 2007-12-23 16:59:28 +00:00
Owen Anderson
e9538b78ce Sketch out an implementation of Briggs' copy placement algorithm. 
llvm-svn: 45334
 2007-12-23 15:37:26 +00:00
Chris Lattner
a2156b160a fix some warnings. This code needs to be de-tabified :( 
llvm-svn: 45325
 2007-12-22 22:47:03 +00:00
Chris Lattner
1c6a1f71cb fix strict-aliasing violation 
llvm-svn: 45324
 2007-12-22 22:45:38 +00:00
Chris Lattner
084002dcb0 initial code for forming an FGETSIGN node. This is disabled until 
legalizer support goes in.

llvm-svn: 45323
 2007-12-22 21:35:38 +00:00
Chris Lattner
24b2a6de5c improve support for fgetsign 
llvm-svn: 45322
 2007-12-22 21:26:52 +00:00
Chris Lattner
a8f6fac7a3 Tell TargetLoweringOpt whether it is running before 
or after legalize.

llvm-svn: 45321
 2007-12-22 20:56:36 +00:00
Chris Lattner
f2aa80e0de Add a new FGETSIGN operation, which defaults to expand on all 
targets.

llvm-svn: 45320
 2007-12-22 20:47:56 +00:00
Anton Korobeynikov
4275f59e61 Erm, really disable :) 
llvm-svn: 45319
 2007-12-22 20:46:24 +00:00
Anton Korobeynikov
9f148a1a2a Disable, until we'll really need it 
llvm-svn: 45318
 2007-12-22 20:41:12 +00:00
Gordon Henriksen
fccde96a4c Use getIntrinsicID instead of looking up intrinsic prototypes. Also 
fixes a bug with indirect calls. (Test case will be included with
ocaml collector patch.)

llvm-svn: 45316
 2007-12-22 17:27:01 +00:00
Anton Korobeynikov
07c828b637 Unbreak mingw build 
llvm-svn: 45314
 2007-12-22 14:26:49 +00:00
Evan Cheng
c226a1a7d3 Preliminary PIC JIT support for X86 (32-bit) / Darwin. 
llvm-svn: 45313
 2007-12-22 09:40:20 +00:00
Evan Cheng
5b05d625cd Oops. 
llvm-svn: 45312
 2007-12-22 09:14:34 +00:00
Chris Lattner
d64df490ca implement InstCombine/shift-trunc-shift.ll. This allows 
us to compile:
#include <math.h>
int t1(double d) { return signbit(d); }

into:

_t1:
	movd	%xmm0, %rax
	shrq	$63, %rax
	ret

instead of:

_t1:
	movd	%xmm0, %rax
	shrq	$32, %rax
	shrl	$31, %eax
	ret

on x86-64.

llvm-svn: 45311
 2007-12-22 09:07:47 +00:00
Owen Anderson
3fc4fdaa1f Note what still needs doing. 
llvm-svn: 45310
 2007-12-22 04:59:10 +00:00
Owen Anderson
f3765d08f8 Remove critical edge breaking. It won't be necessary as long as we are very careful when inserting copies. 
llvm-svn: 45309
 2007-12-22 04:50:11 +00:00
Evan Cheng
8f4ec948d3 Fix JIT code emission of X86::MovePCtoStack. 
llvm-svn: 45307
 2007-12-22 02:26:46 +00:00
Devang Patel
e035f776e9 If succ has succ itself as one of the predecessors then do 
not merge current bb and succ even if bb's terminator is
unconditional branch to succ.

llvm-svn: 45305
 2007-12-22 01:32:53 +00:00
Evan Cheng
51f51c7572 Allow JIT with non-static relocation model. 
llvm-svn: 45304
 2007-12-22 01:12:14 +00:00
Anton Korobeynikov
913c80d37f Fix silly typo in the FP CEP handling. 
llvm-svn: 45300
 2007-12-21 23:33:44 +00:00
Duncan Sands
99690fb26c Fix a brain fart by our beloved leader (the content 
of this patch is the last line).

llvm-svn: 45289
 2007-12-21 20:18:41 +00:00
Duncan Sands
bc10247769 Get the verifier to check attributes on calls as well 
as on functions.  Make it verify invokes and not just
ordinary calls.  As a (desired) side-effect, it is no
longer legal to have call attributes on arguments that
are being passed to the varargs part of a varargs
function (llvm-as drops them on the floor anyway).

llvm-svn: 45286
 2007-12-21 19:19:01 +00:00
Duncan Sands
85ca85c070 Make DAE not wipe out attributes on calls, and not drop 
return attributes on the floor.  In the case of a call
to a varargs function where the varargs arguments are
being removed, any call attributes on those arguments
need to be dropped.  I didn't do this because I plan to
make it illegal to have such attributes (see next patch).
With this change, compiling the gcc filter2 eh test at -O0
and then running opt -std-compile-opts on it results in
a correctly working program (compiling at -O1 or higher
results in the test failing due to a problem with how we
output eh info into the IR).

llvm-svn: 45285
 2007-12-21 19:16:16 +00:00
Nicolas Geoffray
1996d8b1f4 Fix unintented change from last commit 
llvm-svn: 45282
 2007-12-21 12:22:29 +00:00
Nicolas Geoffray
18ab237446 Enable EH for linux/ppc32 targets 
llvm-svn: 45281
 2007-12-21 12:19:44 +00:00
Evan Cheng
a111629401 New entry. 
llvm-svn: 45280
 2007-12-21 01:31:58 +00:00
Evan Cheng
eba18a1952 Fix JIT encoding for CMPSD as well. 
llvm-svn: 45268
 2007-12-20 19:57:09 +00:00
Evan Cheng
8fee10d116 More accurate checks for two-address constraints. 
llvm-svn: 45259
 2007-12-20 09:25:31 +00:00