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100 Commits

Author SHA1 Message Date
Bill Wendling
0f3f36688b Initial checkin for stack protectors. Here's what it does: 
* The prologue is modified to read the __stack_chk_guard global and insert it
  onto the stack.

* The epilogue is modified to read the stored guard from the stack and compare
  it to the original __stack_chk_guard value. If they differ, then the
  __stack_chk_fail() function is called.

* The stack protector needs to be first on the stack (after the parameters) to
  catch any stack-smashing activities.

Front-end support will follow after a round of beta testing.

llvm-svn: 58673
 2008-11-04 02:10:20 +00:00
Evan Cheng
1bc92a1aa6 Add skeleton for the pre-register allocation live interval splitting pass. 
llvm-svn: 57847
 2008-10-20 21:44:59 +00:00
Evan Cheng
c589085710 A Partitioned Boolean Quadratic Programming (PBQP) based register allocator. 
Contributed by Lang Hames.

llvm-svn: 56959
 2008-10-02 18:29:27 +00:00
Dan Gohman
d0c6cb65e8 Add a new MachineInstr-level DCE pass. It is very simple, and is intended to 
be used with fast-isel.

llvm-svn: 56268
 2008-09-17 00:43:24 +00:00
Gordon Henriksen
2cc861a6c1 Rename some GC classes so that their roll will hopefully be clearer. 
In particular, Collector was confusing to implementors. Several
thought that this compile-time class was the place to implement
their runtime GC heap. Of course, it doesn't even exist at runtime.
Specifically, the renames are:

  Collector               -> GCStrategy
  CollectorMetadata       -> GCFunctionInfo
  CollectorModuleMetadata -> GCModuleInfo
  CollectorRegistry       -> GCRegistry
  Function::getCollector  -> getGC (setGC, hasGC, clearGC)

Several accessors and nested types have also been renamed to be
consistent. These changes should be obvious.

llvm-svn: 54899
 2008-08-17 18:44:35 +00:00
Owen Anderson
84fbc312d4 - Fix SelectionDAG to generate correct CFGs. 
- Add a basic machine-level dead block eliminator.

These two have to go together, since many other parts of the code generator are unable to handle the unreachable blocks otherwise created.

llvm-svn: 54333
 2008-08-04 23:54:43 +00:00
Evan Cheng
2fc7954878 Add a stack slot coloring pass. Not yet enabled. 
llvm-svn: 51934
 2008-06-04 09:18:41 +00:00
Dan Gohman
138a53b303 Change class' public PassInfo variables to by initialized with the 
address of the PassInfo directly instead of calling getPassInfo.
This eliminates a bunch of dynamic initializations of static data.

Also, fold RegisterPassBase into PassInfo, make a bunch of its
data members const, and rearrange some code to initialize data
members in constructors instead of using setter member functions.

llvm-svn: 51022
 2008-05-13 02:05:11 +00:00
Evan Cheng
f8b1257d2e Add a quick and dirty "loop aligner pass". x86 uses it to align its loops to 16-byte boundaries. 
llvm-svn: 47703
 2008-02-28 00:43:03 +00:00
Bill Wendling
93556af6c4 Don't recalculate the loop info and loop dominators analyses if they're 
preserved.

llvm-svn: 45596
 2008-01-04 20:54:55 +00:00
Chris Lattner
f4972fa569 Add a really quick hack at a machine code sinking pass, enabled with --enable-sinking. 
It is missing validity checks, so it is known broken.  However, it is powerful enough
to compile this contrived code:

void test1(int C, double A, double B, double *P) {
  double Tmp = A*A+B*B;
  *P = C ? Tmp : A;
}

into:

_test1:
	movsd	8(%esp), %xmm0
	cmpl	$0, 4(%esp)
	je	LBB1_2	# entry
LBB1_1:	# entry
	movsd	16(%esp), %xmm1
	mulsd	%xmm1, %xmm1
	mulsd	%xmm0, %xmm0
	addsd	%xmm1, %xmm0
LBB1_2:	# entry
	movl	24(%esp), %eax
	movsd	%xmm0, (%eax)
	ret

instead of:

_test1:
	movsd	16(%esp), %xmm0
	mulsd	%xmm0, %xmm0
	movsd	8(%esp), %xmm1
	movapd	%xmm1, %xmm2
	mulsd	%xmm2, %xmm2
	addsd	%xmm0, %xmm2
	cmpl	$0, 4(%esp)
	je	LBB1_2	# entry
LBB1_1:	# entry
	movapd	%xmm2, %xmm1
LBB1_2:	# entry
	movl	24(%esp), %eax
	movsd	%xmm1, (%eax)
	ret

woo.

llvm-svn: 45570
 2008-01-04 07:36:53 +00:00
Chris Lattner
e0b1ee937a Don't attribute in file headers anymore. See llvmdev for the 
discussion of this change.  Boy are my fingers tired. ;-)

llvm-svn: 45411
 2007-12-29 19:59:42 +00:00
Gordon Henriksen
c6f9e0beef CollectorMetadata and Collector are rejiggered to get along with 
per-function collector model. Collector is now the factory for
CollectorMetadata, so the latter may be subclassed.

llvm-svn: 44827
 2007-12-11 00:30:17 +00:00
Bill Wendling
c08dedb060 Initial commit of the machine code LICM pass. It successfully hoists this: 
_foo:
        li r2, 0
LBB1_1: ; bb
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmplw cr0, r2, r4
        bne cr0, LBB1_1 ; bb
LBB1_2: ; return
        blr 

to:

_foo:
        li r2, 0
        li r5, 0
LBB1_1: ; bb
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmplw cr0, r2, r4
        bne cr0, LBB1_1 ; bb
LBB1_2: ; return
        blr

ZOMG!! :-)

Moar to come...

llvm-svn: 44687
 2007-12-07 21:42:31 +00:00
Owen Anderson
40abf86e03 As Chris and Evan pointed out, BreakCriticalMachineEdges doesn't really need 
to be a pass of its own.  Instead, move it out into a helper method.

llvm-svn: 44002
 2007-11-12 01:05:09 +00:00
Owen Anderson
8f46b986d9 Make BreakCriticalMachineEdges available as a pass that can be depended on. 
llvm-svn: 43910
 2007-11-08 22:20:23 +00:00
Owen Anderson
ae0530aaf4 Add the skeleton of a better PHI elimination pass. 
llvm-svn: 43542
 2007-10-31 03:37:57 +00:00
David Greene
2ca4b270db Pluggable coalescers inplementation. 
llvm-svn: 41743
 2007-09-06 16:18:45 +00:00
Christopher Lamb
8875f43912 Implement review feedback. No functionality change. 
llvm-svn: 40863
 2007-08-06 16:33:56 +00:00
Christopher Lamb
258dab5389 Add a MachineFunction pass, which runs post register allocation, that turns subreg insert/extract instruction into register copies. This ensures correct code gen if the coalescer isn't able to remove all subreg instructions. 
llvm-svn: 40521
 2007-07-26 08:18:32 +00:00
Dale Johannesen
469ed8e17e Skeleton of post-RA scheduler; doesn't do anything yet. 
Change name of -sched option and DEBUG_TYPE to
pre-RA-sched; adjust testcases.

llvm-svn: 39816
 2007-07-13 17:13:54 +00:00
Dan Gohman
7cf351b873 Remove declarations for code no longer in the tree, to avoid confusion. 
llvm-svn: 37840
 2007-07-02 15:06:26 +00:00
Duraid Madina
fe6e41b4f9 check in the BigBlock local register allocator 
llvm-svn: 37703
 2007-06-22 08:27:12 +00:00
David Greene
6b14050d1e Factor live variable analysis so it does not do register coalescing 
simultaneously.  Move that pass to SimpleRegisterCoalescing.

This makes it easier to implement alternative register allocation and
coalescing strategies while maintaining reuse of the existing live
interval analysis.

llvm-svn: 37520
 2007-06-08 17:18:56 +00:00
Dale Johannesen
fe0fe14411 Make tail merging the default, except on powerPC. There was no prior art 
for a target-dependent default with a command-line override; this way
should be generally usable.

llvm-svn: 37285
 2007-05-22 17:14:46 +00:00
Evan Cheng
aafca4d4a2 Initial commit of (very basic) if converter. 
llvm-svn: 37092
 2007-05-16 02:00:57 +00:00
Bill Wendling
43476f030c Oops! didn't mean to put this in there yet. 
llvm-svn: 32014
 2006-11-29 07:31:23 +00:00
Bill Wendling
4effa38086 Replacing std::iostreams with llvm iostreams. Some of these changes involve 
adding a temporary wrapper around the ostream to make it friendly to
functions expecting an LLVM stream. This should be fixed in the future.

llvm-svn: 31990
 2006-11-29 00:19:40 +00:00
Jim Laskey
7e0f0b2d24 1. Add a pass to fold debug label instructions so a debug info client can detect 
empty ranges.

2. Reorg how MachineDebugInfo maintains changes to debug labels.

3. Have dwarf writer use debug label info to simplify scopes and source line
coorespondence.

4. Revert the merging of compile units until I can get the bugs ironed out.

llvm-svn: 31507
 2006-11-07 19:33:46 +00:00
Chris Lattner
1245463d22 Remove a prototype 
llvm-svn: 23951
 2005-10-24 04:13:21 +00:00
Tanya Lattner
ec45f6a4cd Adding ModuloSched SB. 
llvm-svn: 21648
 2005-05-01 16:14:34 +00:00
Misha Brukman
4ad5efd1a9 Remove trailing whitespace 
llvm-svn: 21409
 2005-04-21 20:39:54 +00:00
Chris Lattner
ab1daf9f8a New pass 
llvm-svn: 15367
 2004-07-31 09:59:14 +00:00
Alkis Evlogimenos
b5f60641f4 Add Iterative scan register allocator. 
llvm-svn: 15068
 2004-07-21 08:24:35 +00:00
Chris Lattner
c71f8fcb8e Add a new pass for code generators to use 
llvm-svn: 14562
 2004-07-02 05:44:13 +00:00
Tanya Lattner
9b4ee61855 Registering the ModuloScheduling pass. 
llvm-svn: 13427
 2004-05-08 16:14:02 +00:00
Brian Gaeke
efde1c6bb8 Include <iosfwd> and <string> instead of <iostream>. 
Take away the default iostream argument of createMachineFunctionPrinterPass(),
at Chris's request.

llvm-svn: 11121
 2004-02-04 21:41:10 +00:00
Brian Gaeke
9cf840250b Give clients of MachineFunctionPrinter the ability to specify a banner and 
choose an ostream.

llvm-svn: 11016
 2004-01-30 21:53:46 +00:00
Chris Lattner
58d2beb555 Rearrange code, indent for the namespace, add the createMachineFunctionPrinterPass 
to passes.h, and add the machien destruction pass to Passes.h

llvm-svn: 10557
 2003-12-20 10:18:58 +00:00
Alkis Evlogimenos
9181e0ab5b Remove TwoAddressInstruction from the public headers and add an ID 
instead, since this pass doesn't expose any state to its users.

llvm-svn: 10520
 2003-12-18 22:40:24 +00:00
Alkis Evlogimenos
6627a32ff9 Merging the linear scan register allocator in trunk. It currently passes most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it. 
llvm-svn: 10103
 2003-11-20 03:32:25 +00:00
Brian Gaeke
d25f86d683 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
John Criswell
16c6cda9d5 Added LLVM copyright header (for lack of a better term). 
llvm-svn: 9304
 2003-10-20 20:19:47 +00:00
Alkis Evlogimenos
a37b58ce09 Moved enum and command-line option in separate file. Also added function that returns the user selected register allocator to the caller. 
llvm-svn: 8819
 2003-10-02 16:57:49 +00:00
Alkis Evlogimenos
42a09316bb Change llc command line for register allocators 
llvm-svn: 8815
 2003-10-02 06:13:19 +00:00
Chris Lattner
c3767eab12 Forward declare a class 
llvm-svn: 8797
 2003-09-30 20:15:40 +00:00
Chris Lattner
08d6f140ab Include the sparc register in this file 
llvm-svn: 8794
 2003-09-30 20:14:43 +00:00
Misha Brukman
cda7f97dbb The word dependent' has no a'. 
llvm-svn: 8030
 2003-08-21 22:14:26 +00:00
Brian Gaeke
77c65be59e Factory methods for FunctionPasses now return type FunctionPass *. 
llvm-svn: 7823
 2003-08-13 18:18:15 +00:00
Chris Lattner
fb1bfc8cde Add new files 
llvm-svn: 5259
 2003-01-13 01:01:31 +00:00