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Author SHA1 Message Date
Chris Lattner
d696c25db5 This readme entry is done, testcase here: CodeGen/X86/zero-remat.ll 
llvm-svn: 47106
 2008-02-14 05:39:46 +00:00
Nick Lewycky
e6e0cdd2dc PR2027, Fix bugpoint's -find-bugs option, clean up the code. 
llvm-svn: 47105
 2008-02-14 05:01:46 +00:00
Evan Cheng
cbbcb3144d Fix test. 
llvm-svn: 47102
 2008-02-14 01:32:53 +00:00
Dan Gohman
83374c9be5 Allow the APInt form of ComputeMaskedBits to operate on i128 types. 
llvm-svn: 47101
 2008-02-13 23:13:32 +00:00
Dan Gohman
737856bd0d Assigning an APInt to 0 with plain assignment gives it a one-bit 
size. Initialize these APInts to properly-sized zero values.

llvm-svn: 47099
 2008-02-13 23:07:24 +00:00
Dan Gohman
a5ad7ff23b Avoid setting bits that aren't demanded. 
llvm-svn: 47098
 2008-02-13 22:43:25 +00:00
Dan Gohman
5562e340b7 Fix a typo in a comment. 
llvm-svn: 47097
 2008-02-13 22:32:12 +00:00
Dan Gohman
99b38405e3 Simplify some logic in ComputeMaskedBits. And change ComputeMaskedBits 
to pass the mask APInt by value, not by reference. 

llvm-svn: 47096
 2008-02-13 22:28:48 +00:00
Devang Patel
38de2d11a5 A loop latch phi node may have uses inside loop, not just in loop header. 
llvm-svn: 47093
 2008-02-13 22:23:07 +00:00
Dan Gohman
588498082a Rename APInt's isPositive to isNonNegative, to reflect what it 
actually does.

llvm-svn: 47090
 2008-02-13 22:09:18 +00:00
Devang Patel
1e71afe2df While moving exit condition, do not drop loop latch on the floor. 
llvm-svn: 47089
 2008-02-13 22:06:36 +00:00
Dan Gohman
d22101a970 Add countTrailingOnes member functions to APInt. 
llvm-svn: 47086
 2008-02-13 21:11:05 +00:00
Dan Gohman
547ea0a60d Fix a typo in a comment. 
llvm-svn: 47085
 2008-02-13 20:56:53 +00:00
Dan Gohman
2181ea3b6c Add count{Leading,Trailing}Ones_{32,64} functions with simple implementations. 
llvm-svn: 47084
 2008-02-13 20:54:54 +00:00
Devang Patel
d48bbbf07b Keep track of exit value operand number when operands are swapped. 
llvm-svn: 47082
 2008-02-13 19:48:48 +00:00
Nicolas Geoffray
72fa78e195 Enable exception handling int JIT 
llvm-svn: 47079
 2008-02-13 18:39:37 +00:00
Dale Johannesen
cc4f128930 New test, see comments. 
llvm-svn: 47078
 2008-02-13 18:36:48 +00:00
Duncan Sands
2e9661573f Teach LegalizeTypes how to expand and promote CTLZ, 
CTTZ and CTPOP.  The expansion code differs from
that in LegalizeDAG in that it chooses to take the
CTLZ/CTTZ count from the Hi/Lo part depending on
whether the Hi/Lo value is zero, not on whether
CTLZ/CTTZ of Hi/Lo returned 32 (or whatever the
width of the type is) for it.  I made this change
because the optimizers may well know that Hi/Lo
is zero and exploit it.  The promotion code for
CTTZ also differs from that in LegalizeDAG: it
uses an "or" to get the right result when the
original value is zero, rather than using a compare
and select.  This also means the value doesn't
need to be zero extended.

llvm-svn: 47075
 2008-02-13 18:01:53 +00:00
Chris Lattner
e1cbaa3334 gcc 3.2.3 is also bad. 
llvm-svn: 47073
 2008-02-13 17:50:24 +00:00
Chris Lattner
80b3a56774 Fix the PPC JIT regressions by encoding zeroreg as 0 for BLR. 
llvm-svn: 47067
 2008-02-13 17:24:14 +00:00
Chris Lattner
c16c85444c remove some dead code. 
llvm-svn: 47066
 2008-02-13 17:18:26 +00:00
Devang Patel
8190e4fbe0 Remove use of ltdl 
llvm-svn: 47065
 2008-02-13 17:11:39 +00:00
Duncan Sands
855d854415 Add notes on Ada compilers that can be used for 
the build.  Put all items that the user should
specify in bold.  Make it a debug build.

llvm-svn: 47063
 2008-02-13 16:46:10 +00:00
Wojciech Matyjewicz
a62f8557d9 Fix typo. Thanks to Duncan for noticing. 
llvm-svn: 47062
 2008-02-13 12:21:32 +00:00
Wojciech Matyjewicz
86032c3a2f Add comments as per review feedback. 
llvm-svn: 47061
 2008-02-13 11:51:34 +00:00
Evan Cheng
d513437ce1 Some code clean up. 
llvm-svn: 47060
 2008-02-13 09:56:03 +00:00
Evan Cheng
9c21fd25f0 Simplify. 
llvm-svn: 47059
 2008-02-13 09:18:16 +00:00
Evan Cheng
84c503fdd4 Simplify. 
llvm-svn: 47058
 2008-02-13 09:13:21 +00:00
Evan Cheng
0e4d4f17cc Fix a potential serious problem where kills belonging to the val# defined by a two-address instruction is also on the val# that defines the input. 
llvm-svn: 47057
 2008-02-13 09:06:18 +00:00
Evan Cheng
e0cad13e5e * Cannot safely commute an instruction there are other defs which can reach its uses. 
* Ignore copy instructions which have already been coalesced.

llvm-svn: 47056
 2008-02-13 08:41:08 +00:00
Eli Friedman
cf6273d015 Add a note pointing to PR1996. 
llvm-svn: 47055
 2008-02-13 07:56:04 +00:00
Chris Lattner
a30946c576 In SDISel, for targets that support FORMAL_ARGUMENTS nodes, lower this 
node as soon as we create it in SDISel.  Previously we would lower it in
legalize.  The problem with this is that it only exposes the argument
loads implied by FORMAL_ARGUMENTs after legalize, so that only dag combine 2
can hack on them.  This causes us to miss some optimizations because 
datatype expansion also happens here.

Exposing the loads early allows us to do optimizations on them.  For example
we now compile arg-cast.ll to:

_foo:
	movl	$2147483647, %eax
	andl	8(%esp), %eax
	ret

where we previously produced:

_foo:
	subl	$12, %esp
	movsd	16(%esp), %xmm0
	movsd	%xmm0, (%esp)
	movl	$2147483647, %eax
	andl	4(%esp), %eax
	addl	$12, %esp
	ret

It might also make sense to do this for ISD::CALL nodes, which have implicit
stores on many targets.

llvm-svn: 47054
 2008-02-13 07:39:09 +00:00
Chris Lattner
57f2088225 don't try to avoid inserting loads when lowering FORMAL_ARGUMENTS. 
DAGCombine is now quite good at zapifying them.

llvm-svn: 47053
 2008-02-13 07:35:30 +00:00
Chris Lattner
c798882db7 teach dag combiner how to eliminate MERGE_VALUES nodes. 
llvm-svn: 47052
 2008-02-13 07:25:05 +00:00
Nate Begeman
5f18794295 readme updates 
llvm-svn: 47051
 2008-02-13 07:06:12 +00:00
Eli Friedman
75220639b6 Add test for PR1996. (This is my first time adding a test for a 
transform, so please review.)

llvm-svn: 47050
 2008-02-13 06:55:57 +00:00
Nate Begeman
cfd9883301 Add testcase for recent legalizer change 
llvm-svn: 47049
 2008-02-13 06:48:40 +00:00
Nate Begeman
f628b4b2a7 Support legalizing insert_vector_elt on targets where the element 
type is not legal.

llvm-svn: 47048
 2008-02-13 06:43:04 +00:00
Evan Cheng
68a88c1f52 New tests. 
llvm-svn: 47047
 2008-02-13 03:23:53 +00:00
Evan Cheng
d4ddda68fa Initial support for copy elimination by commuting its definition MI. 
PR1877.
A3 = op A2 B0<kill>                                                                                                                                                                            
...                                                                                                                                                                                     
B1 = A3      <- this copy                                                                                                                                                                      
...                                                                                                                                                                                          
   = op A3   <- more uses                                                                                                                                                                      
                                                                                                                                                                                                 
==>                                                                                                                                                                                             
                                                                                                                                                                                            
B2 = op B0 A2<kill>                                                                                                                                                                            
...                                                                                                                                                                                          
B1 = B2      <- now an identify copy                                                                                                                                                           
...                                                                                                                                                                                          
   = op B2   <- more uses

This speeds up FreeBench/neural by 29%, Olden/bh by 12%, oopack_v1p8 by 53%.

llvm-svn: 47046
 2008-02-13 03:01:43 +00:00
Nate Begeman
1867c6c264 Make register scavenging happy by not using a reg (CR0) that isn't defined 
llvm-svn: 47045
 2008-02-13 02:58:33 +00:00
Evan Cheng
da24989368 - Added removeValNo() to remove all live ranges of a particular value#. 
- removeRange() can now update value# information.

llvm-svn: 47044
 2008-02-13 02:48:26 +00:00
Evan Cheng
4b37f5ff05 commuteInstr() can now commute non-ssa machine instrs. 
llvm-svn: 47043
 2008-02-13 02:46:49 +00:00
Evan Cheng
95894280dc Added debugging routine dumpUses. 
llvm-svn: 47042
 2008-02-13 02:45:38 +00:00
Dan Gohman
09023887f8 Convert SelectionDAG::ComputeMaskedBits to use APInt instead of uint64_t. 
Add an overload that supports the uint64_t interface for use by clients
that haven't been updated yet.

llvm-svn: 47039
 2008-02-13 00:35:47 +00:00
Dale Johannesen
4621e574c9 __DATA not __DATA__ is the right segment name on darwin. 
Spotted by Nick Kledzik.

llvm-svn: 47037
 2008-02-12 23:35:09 +00:00
Nate Begeman
589ecad41d Remove some dead code 
llvm-svn: 47036
 2008-02-12 22:54:40 +00:00
Nate Begeman
810b85bde8 SSE4.1 64b integer insert/extract pattern support 
Move formats into the formats file

llvm-svn: 47035
 2008-02-12 22:51:28 +00:00
Dan Gohman
f65b0b112c Change APInt::getBitsSet to accept a "half-open" range, where the 
hiBit parameter marks the index one past the last desired set bit.

llvm-svn: 47032
 2008-02-12 21:47:33 +00:00
Duncan Sands
a2c3d4ee96 Note that these instructions are for x86-32 linux 
(the only platform on which the Ada compiler even
builds).

llvm-svn: 47031
 2008-02-12 21:40:21 +00:00