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9555739636
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21252 Commits

Author SHA1 Message Date
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
c465555fe6 add a testcase 
llvm-svn: 45768
 2008-01-09 00:37:18 +00:00
Chris Lattner
4253eeaeb3 add a note 
llvm-svn: 45766
 2008-01-09 00:17:57 +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
Duncan Sands
6f28b87039 Use size_t to store Pos, avoid truncating value 
on 64-bit builds.  Analysis and original patch
by Török Edwin.  Code audit found another place
with the same problem, also fixed here.

llvm-svn: 45746
 2008-01-08 10:06:15 +00:00
Chris Lattner
67f581b344 Implement PR1795, an instcombine hack for forming GEPs with integer pointer arithmetic. 
llvm-svn: 45745
 2008-01-08 07:23:51 +00:00
Chris Lattner
cafc567fb7 Finally implement correct ordered comparisons for PPC, even though 
the code generated is not wonderful.  This turns a miscompilation into
a code quality bug (noted in the ppc readme).  This fixes PR642, which
is over 2 years old (!).  Nate, please review this.

llvm-svn: 45742
 2008-01-08 06:46:30 +00:00
Owen Anderson
23abe71f4d Actually insert copies now! 
llvm-svn: 45738
 2008-01-08 05:16:15 +00:00
Evan Cheng
e7fd8ad117 Minor fix to enable x86-64 pic jit (still fails for other reasons). 
llvm-svn: 45734
 2008-01-08 02:07:10 +00:00
Evan Cheng
165d39b8e4 Fix a x86-64 static codegen bug. This fixes a lot of x86-64 jit failures. 
llvm-svn: 45733
 2008-01-08 02:06:11 +00:00
Bill Wendling
e859abc363 Silence warning about loss of precision. 
llvm-svn: 45731
 2008-01-08 00:52:29 +00:00
Evan Cheng
9de4f35e9f Only mark instructions that load a single value without extension as isSimpleLoad = 1. 
llvm-svn: 45727
 2008-01-07 23:56:57 +00:00
Chris Lattner
32934de862 add a new bit. 
llvm-svn: 45726
 2008-01-07 23:16:55 +00:00
Evan Cheng
ae2f627ea8 Unbreak x86-64. 
llvm-svn: 45725
 2008-01-07 23:08:23 +00:00
Chris Lattner
184daf9101 add a note that is important for some fp apps. 
llvm-svn: 45723
 2008-01-07 21:59:58 +00:00
Chris Lattner
66e631ace3 possible switch lowering improvement. 
llvm-svn: 45720
 2008-01-07 21:38:14 +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
Duncan Sands
3d1260ba4d I doubt the address of the Error string was intended 
to be used for the force_interpreter parameter...
Spotted by gcc-4.2.

llvm-svn: 45714
 2008-01-07 19:14:42 +00:00
Duncan Sands
7209d0c045 Add missing newline at EOF. 
llvm-svn: 45712
 2008-01-07 19:13:36 +00:00
Duncan Sands
7955cf0cd7 Small cleanup for handling of type/parameter attribute 
incompatibility.

llvm-svn: 45704
 2008-01-07 17:16:06 +00:00
Duncan Sands
fbbbb24641 Unbreak x86-32 darwin long double! 
llvm-svn: 45703
 2008-01-07 16:36:38 +00:00
Duncan Sands
93959fc16a Fix long double support on x86-32 linux. 
llvm-svn: 45701
 2008-01-07 13:44:22 +00:00
Gordon Henriksen
fb55daea95 Pruning includes. 
llvm-svn: 45700
 2008-01-07 13:30:38 +00:00
Bill Wendling
b94c1f2999 Operand 1 should be a register. We don't care if it's a preg, vreg, or 0. 
llvm-svn: 45699
 2008-01-07 08:05:29 +00:00
Chris Lattner
9aefefc673 add a note 
llvm-svn: 45698
 2008-01-07 07:46:23 +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
e83299018e use predicate. 
llvm-svn: 45691
 2008-01-07 06:37:29 +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
354275d0b2 remove a dead field. 
llvm-svn: 45685
 2008-01-07 04:57:42 +00:00
Chris Lattner
4421b821f5 no need to explicitly clear these fields. 
llvm-svn: 45683
 2008-01-07 04:55:09 +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
55343065e3 remove MachineOpCode typedef. 
llvm-svn: 45679
 2008-01-07 02:48:55 +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
Gordon Henriksen
f0803127c6 Deleting an empty file. Thanks, /usr/bin/patch! 
llvm-svn: 45675
 2008-01-07 02:29:04 +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
Owen Anderson
f19692b2f6 Move even more functionality from MRegisterInfo into TargetInstrInfo. 
Some day I'll get it all moved over...

llvm-svn: 45672
 2008-01-07 01:35:02 +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