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57714c090b
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4446 Commits

Author SHA1 Message Date
Evan Cheng
57714c090b ByVal stack slot alignment should be at least as large as pointer ABI alignment. 
llvm-svn: 45995
 2008-01-15 03:14:05 +00:00
Chris Lattner
b067edf1b3 don't create the post-ra scheduler unless it is enabled. 
llvm-svn: 45972
 2008-01-14 19:00:06 +00:00
Chris Lattner
a6559b0047 remove dead #include 
llvm-svn: 45971
 2008-01-14 18:45:28 +00:00
Duncan Sands
423244deda Remove the assumption that byval has been applied to 
a pointer to a struct.

llvm-svn: 45939
 2008-01-13 21:19:59 +00:00
Chris Lattner
efa13b2edd implement support for sinking a load out the bottom of a block that 
has no stores between the load and the end of block.  This works 
great and sinks hundreds of stores, but we can't turn it on because
machineinstrs don't have volatility information and we don't want to
sink volatile stores :(

llvm-svn: 45894
 2008-01-12 00:17:41 +00:00
Chris Lattner
bfffa4f21e Simplify the side effect stuff a bit more and make licm/sinking 
both work right according to the new flags.

This removes the TII::isReallySideEffectFree predicate, and adds
TII::isInvariantLoad. 

It removes NeverHasSideEffects+MayHaveSideEffects and adds
UnmodeledSideEffects as machine instr flags.  Now the clients
can decide everything they need.

I think isRematerializable can be implemented in terms of the
flags we have now, though I will let others tackle that.

llvm-svn: 45843
 2008-01-10 23:08:24 +00:00
Chris Lattner
e5b817779c Clamp down on sinking of lots of instructions. 
llvm-svn: 45841
 2008-01-10 22:35:15 +00:00
Duncan Sands
2c89976416 Output sinl for a long double FSIN node, not sin. 
Likewise fix up a bunch of other libcalls.  While
there I remove NEG_F32 and NEG_F64 since they are
not used anywhere.  This fixes 9 Ada ACATS failures.

llvm-svn: 45833
 2008-01-10 10:28:30 +00:00
Evan Cheng
444d24972f Only remat loads from immutable stack slots. 
llvm-svn: 45831
 2008-01-10 08:24:38 +00:00
Evan Cheng
6e03db7604 Simplify some code. 
llvm-svn: 45830
 2008-01-10 08:22:10 +00:00
Owen Anderson
59c3242247 Don't use LiveVariables::VarInfo::DefInst. 
llvm-svn: 45815
 2008-01-10 03:12:54 +00:00
Dale Johannesen
fdd4b3846f Emit unused EH frames for weak definitions on Darwin, 
because assembler/linker can't cope with weak absolutes.
PR 1880.

llvm-svn: 45811
 2008-01-10 02:03:30 +00:00
Owen Anderson
a8f32828c8 Get rid of all uses of LiveVariables::VarInfo::DefInst in favor of the equivalent API from 
MachineRegisterInfo.  Once all clients are switched over, the former will be going away.

llvm-svn: 45805
 2008-01-10 01:36:43 +00:00
Owen Anderson
e2b710013f Add more comments explaining the basics of how the decision of when to rename and when to insert 
copies is made.

llvm-svn: 45799
 2008-01-10 00:47:01 +00:00
Owen Anderson
a0e5b9a317 Get rid of the isKillInst predicate. LiveVariables already provides this information. 
llvm-svn: 45797
 2008-01-10 00:33:11 +00:00
Owen Anderson
b5be87349c Copies need to be inserted before the first terminator, not at the end of the block. 
llvm-svn: 45791
 2008-01-10 00:01:41 +00:00
Evan Cheng
ba0214a6cb Special copy SUnit's do not have SDNode's. 
llvm-svn: 45787
 2008-01-09 23:01:55 +00:00
Owen Anderson
62bb891e23 Clean up StrongPHIElimination a bit, and add some more comments to the internal structures. There's 
still more work to do on this front.

llvm-svn: 45783
 2008-01-09 22:40:54 +00:00
Owen Anderson
9555739636 StrongPHIElim: Now with even fewer trivial bugs! 
llvm-svn: 45775
 2008-01-09 10:41:39 +00:00
Owen Anderson
c937ae34a5 Fix an infinite recursion bug in InsertCopies. 
llvm-svn: 45774
 2008-01-09 10:32:30 +00:00
Owen Anderson
01e1f23391 Fix some simple bugs. StrongPHIElimination now does not crash on 164.gzip. 
llvm-svn: 45773
 2008-01-09 06:19:05 +00:00
Chris Lattner
c93ad7d569 Make load->store deletion a bit smarter. This allows us to compile this: 
void test(long long *P) { *P ^= 1; }

into just:

_test:
	movl	4(%esp), %eax
	xorl	$1, (%eax)
	ret

instead of code like this:

_test:
	movl	4(%esp), %ecx
        xorl    $1, (%ecx)
	movl	4(%ecx), %edx
	movl	%edx, 4(%ecx)
	ret

llvm-svn: 45762
 2008-01-08 23:08:06 +00:00
Owen Anderson
3d5485728a Rename registers that do not need copies. 
llvm-svn: 45759
 2008-01-08 21:54:52 +00:00
Owen Anderson
23abe71f4d Actually insert copies now! 
llvm-svn: 45738
 2008-01-08 05:16:15 +00:00
Owen Anderson
6f06a8e8d2 Oops, missed one. 
llvm-svn: 45719
 2008-01-07 21:32:09 +00:00
Owen Anderson
692d2acef8 Make some predicates static. 
llvm-svn: 45718
 2008-01-07 21:30:40 +00:00
Gordon Henriksen
fb55daea95 Pruning includes. 
llvm-svn: 45700
 2008-01-07 13:30:38 +00:00
Chris Lattner
f4f5495b06 remove #includage 
llvm-svn: 45697
 2008-01-07 07:42:25 +00:00
Chris Lattner
f83aae613c rename TargetInstrDescriptor -> TargetInstrDesc. 
Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.

llvm-svn: 45695
 2008-01-07 07:27:27 +00:00
Chris Lattner
e78ce25794 simplify some code. 
llvm-svn: 45693
 2008-01-07 06:47:00 +00:00
Chris Lattner
57e851edfe Rename all the M_* flags to be namespace qualified enums, and switch 
all clients over to using predicates instead of these flags directly.
These are now private values which are only to be used to statically
initialize the tables.

llvm-svn: 45692
 2008-01-07 06:42:05 +00:00
Chris Lattner
c745aa59b3 add more and significantly better comments to the rest of the machineinstr 
flags that can be set.  Add predicates for the ones lacking it, and switch
some clients over to using the predicates instead of Flags directly.

llvm-svn: 45690
 2008-01-07 06:21:53 +00:00
Chris Lattner
18038a0aac simplify some code using new predicates 
llvm-svn: 45689
 2008-01-07 05:40:58 +00:00
Chris Lattner
9b987de2c5 rename hasVariableOperands() -> isVariadic(). Add some comments. 
Evan, please review the comments I added to getNumDefs to make sure
that they are accurate, thx.

llvm-svn: 45687
 2008-01-07 05:19:29 +00:00
Chris Lattner
9d38dfa4a5 Move a bunch more accessors from TargetInstrInfo to TargetInstrDescriptor 
llvm-svn: 45680
 2008-01-07 03:13:06 +00:00
Chris Lattner
96d0a93f8e remove some uses of MachineOpCode, move getSchedClass 
into TargetInstrDescriptor from TargetInstrInfo.

llvm-svn: 45678
 2008-01-07 02:46:03 +00:00
Chris Lattner
93e1e6ee12 Add predicates methods to TargetOperandInfo, and switch all clients 
over to using them, instead of diddling Flags directly.  Change the
various flags from const variables to enums.

llvm-svn: 45677
 2008-01-07 02:39:19 +00:00
Gordon Henriksen
edbfece273 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: 45676
 2008-01-07 02:31:11 +00:00
Chris Lattner
f7f96d818f Rename MachineInstr::getInstrDescriptor -> getDesc(), which reflects 
that it is cheap and efficient to get.

Move a variety of predicates from TargetInstrInfo into 
TargetInstrDescriptor, which makes it much easier to query a predicate
when you don't have TII around.  Now you can use MI->getDesc()->isBranch()
instead of going through TII, and this is much more efficient anyway. Not
all of the predicates have been moved over yet.

Update old code that used MI->getInstrDescriptor()->Flags to use the
new predicates in many places.

llvm-svn: 45674
 2008-01-07 01:56:04 +00:00
Owen Anderson
2e866e9cdf Update CodeGen for MRegisterInfo --> TargetInstrInfo changes. 
llvm-svn: 45673
 2008-01-07 01:35:56 +00:00
Gordon Henriksen
759ed9d805 Ammending r45669 with a missing file. 
llvm-svn: 45671
 2008-01-07 01:33:09 +00:00
Gordon Henriksen
db4f51e1b9 With this patch, the LowerGC transformation becomes the 
ShadowStackCollector, which additionally has reduced overhead with
no sacrifice in portability.

Considering a function @fun with 8 loop-local roots,
ShadowStackCollector introduces the following overhead
(x86):

; shadowstack prologue
        movl    L_llvm_gc_root_chain$non_lazy_ptr, %eax
        movl    (%eax), %ecx
        movl    $___gc_fun, 20(%esp)
        movl    $0, 24(%esp)
        movl    $0, 28(%esp)
        movl    $0, 32(%esp)
        movl    $0, 36(%esp)
        movl    $0, 40(%esp)
        movl    $0, 44(%esp)
        movl    $0, 48(%esp)
        movl    $0, 52(%esp)
        movl    %ecx, 16(%esp)
        leal    16(%esp), %ecx
        movl    %ecx, (%eax)

; shadowstack loop overhead
        (none)

; shadowstack epilogue
        movl    48(%esp), %edx
        movl    %edx, (%ecx)

; shadowstack metadata
        .align  3
___gc_fun:                              # __gc_fun
        .long   8
        .space  4

In comparison to LowerGC:

; lowergc prologue
        movl    L_llvm_gc_root_chain$non_lazy_ptr, %eax
        movl    (%eax), %ecx
        movl    %ecx, 48(%esp)
        movl    $8, 52(%esp)
        movl    $0, 60(%esp)
        movl    $0, 56(%esp)
        movl    $0, 68(%esp)
        movl    $0, 64(%esp)
        movl    $0, 76(%esp)
        movl    $0, 72(%esp)
        movl    $0, 84(%esp)
        movl    $0, 80(%esp)
        movl    $0, 92(%esp)
        movl    $0, 88(%esp)
        movl    $0, 100(%esp)
        movl    $0, 96(%esp)
        movl    $0, 108(%esp)
        movl    $0, 104(%esp)
        movl    $0, 116(%esp)
        movl    $0, 112(%esp)

; lowergc loop overhead
        leal    44(%esp), %eax
        movl    %eax, 56(%esp)
        leal    40(%esp), %eax
        movl    %eax, 64(%esp)
        leal    36(%esp), %eax
        movl    %eax, 72(%esp)
        leal    32(%esp), %eax
        movl    %eax, 80(%esp)
        leal    28(%esp), %eax
        movl    %eax, 88(%esp)
        leal    24(%esp), %eax
        movl    %eax, 96(%esp)
        leal    20(%esp), %eax
        movl    %eax, 104(%esp)
        leal    16(%esp), %eax
        movl    %eax, 112(%esp)

; lowergc epilogue
        movl    48(%esp), %edx
        movl    %edx, (%ecx)

; lowergc metadata
        (none)

llvm-svn: 45670
 2008-01-07 01:30:53 +00:00
Gordon Henriksen
88a41c672b Enabling the target-independent garbage collection infrastructure by hooking it 
up to the various compiler pipelines.

This doesn't actually add support for any GC algorithms, which means it 
temporarily breaks a few tests. To be fixed shortly.

llvm-svn: 45669
 2008-01-07 01:30:38 +00:00
Chris Lattner
14310afe42 rename isLoad -> isSimpleLoad due to evan's desire to have such a predicate. 
llvm-svn: 45667
 2008-01-06 23:38:27 +00:00
Chris Lattner
5489888580 rename isStore -> mayStore to more accurately reflect what it captures. 
llvm-svn: 45656
 2008-01-06 08:36:04 +00:00
Duncan Sands
63b3355183 Remove an unused variable. 
llvm-svn: 45655
 2008-01-06 07:43:13 +00:00
Chris Lattner
60aa495a41 make this build with newer gcc's 
llvm-svn: 45637
 2008-01-05 23:29:51 +00:00
Nate Begeman
a6e9de35ae If custom lowering of insert element fails, the result Val will be 0. 
Don't overwrite a variable used by the fallthrough code path in this
case.

llvm-svn: 45630
 2008-01-05 20:47:37 +00:00
Chris Lattner
9f51583a6a Fix build issue on certain compilers. 
llvm-svn: 45629
 2008-01-05 20:15:42 +00:00
Chris Lattner
0d444b96ac The current impl is really trivial, add some comments about how it can be made better. 
llvm-svn: 45625
 2008-01-05 06:47:58 +00:00