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Author SHA1 Message Date
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
Duncan Sands
f4d6a81b3b Add more spacing. 
llvm-svn: 47028
 2008-02-12 21:28:39 +00:00
Duncan Sands
8216baaed2 Add instructions for building Ada and Fortran. 
Adjust mentions of gcc4 to be 4.0/4.2 agnostic.
This file should probably be renamed tor
 GCCFEBuildInstrs.html...

llvm-svn: 47027
 2008-02-12 21:22:58 +00:00
Owen Anderson
274aa2846e Re-apply the patch to improve the optimizations of memcpy's, with several 
bugs fixed.  This now passes PPC bootstrap.

llvm-svn: 47026
 2008-02-12 21:15:18 +00:00
Duncan Sands
1122ee4ded Generalize getCopyFromParts and getCopyToParts to 
handle arbitrary precision integers and any number
of parts.  For example, on a 32 bit machine an i50
corresponds to two i32 parts.  getCopyToParts will
extend the i50 to an i64 then write half of the i64
to each part; getCopyFromParts will combine the two
i32 parts into an i64 then truncate the result to
i50.

llvm-svn: 47024
 2008-02-12 20:46:31 +00:00
Evan Cheng
b05b05aba5 Revert r46916 PPCTargetAsmInfo.cpp. 
llvm-svn: 47020
 2008-02-12 19:25:12 +00:00
Evan Cheng
e3ddcfa588 Only using x86-64 rip relative addressing in non-staic mode? 
llvm-svn: 47019
 2008-02-12 19:20:46 +00:00
Evan Cheng
0d2efb485d Don't mask the isel bug. 
llvm-svn: 47018
 2008-02-12 19:11:29 +00:00
Evan Cheng
6c7520f922 This test assumes no SSE4.1. 
llvm-svn: 47017
 2008-02-12 19:11:08 +00:00
Dan Gohman
3e4b49b4a6 Add a doxygen comment for SrcValueSDNode, to make its purpose 
clear and to clarify how it differs from MemOperandSDNode.

llvm-svn: 47015
 2008-02-12 18:52:52 +00:00
Devang Patel
1f8de09109 Remove dead code. 
llvm-svn: 47012
 2008-02-12 18:20:50 +00:00
Wojciech Matyjewicz
6df5450bc4 Now that ScalarEvolution::print writes to the correct stream, there is 
no need to redirect stderr into stdout.

llvm-svn: 47009
 2008-02-12 15:12:40 +00:00
Wojciech Matyjewicz
ae01857e92 Change negative grep into positive one in my yesterday's testcase. 
llvm-svn: 47008
 2008-02-12 15:10:35 +00:00
Wojciech Matyjewicz
b6e6dacc60 Fix PR2002. Suppose n is the initial value for the induction 
variable (with step 1) and m is its final value. Then, the correct trip 
count is SMAX(m,n)-n. Previously, we used SMAX(0,m-n), but m-n may 
overflow and can't in general be interpreted as signed.

Patch by Nick Lewycky.

llvm-svn: 47007
 2008-02-12 15:09:36 +00:00
Eli Friedman
69268a529e Fix for bug 1996: optimize out loads of undef. This code basically just 
checks for a malloc/alloca immediately followed by a load.

llvm-svn: 47006
 2008-02-12 12:08:14 +00:00
Evan Cheng
c3875c88a7 Update comment. 
llvm-svn: 47002
 2008-02-12 07:59:55 +00:00
Evan Cheng
075ce702eb Unbreak various insert_vector_elt and extract_vector_elt tests in presence of SSE4. 
llvm-svn: 47001
 2008-02-12 07:59:45 +00:00
Tanya Lattner
cefcef7955 Test case for annotate builtin. 
llvm-svn: 46999
 2008-02-12 07:46:33 +00:00
Evan Cheng
1ab096a313 Fix some test cases. 
llvm-svn: 46998
 2008-02-12 07:22:46 +00:00
Bill Wendling
3891d1f4af More violation fixes. 
llvm-svn: 46997
 2008-02-12 07:12:46 +00:00
Bill Wendling
9c834ce7c4 Fix validation errors: di -> dt. 
llvm-svn: 46996
 2008-02-12 07:09:05 +00:00
Bill Wendling
08dd4fca8d Reformatting. Adding "doc_code" divisions for code examples. Updated some 
of the examples to reflect the current .TD files.

llvm-svn: 46995
 2008-02-12 07:06:19 +00:00
Chris Lattner
30fbb8a24a rip out llvm 2.2 stuff in preparation for llvm 2.3 
llvm-svn: 46993
 2008-02-12 06:29:45 +00:00
Chris Lattner
22172fbf15 heavily refactor this to have less duplication between BUILD_FOR_WEBSITE mode and not. 
llvm-svn: 46991
 2008-02-12 06:07:47 +00:00
Chris Lattner
784a67b822 remove unknown details 
llvm-svn: 46985
 2008-02-12 05:07:12 +00:00
Tanya Lattner
2148b386aa Add 2.2 release tag. 
llvm-svn: 46981
 2008-02-12 02:42:55 +00:00
Nate Begeman
5c59b16468 Stuff noticed while grepping code 
llvm-svn: 46979
 2008-02-11 23:47:56 +00:00
Dan Gohman
b7bbe43ad3 Correct the order of the arguments in the examples in the comments 
for APInt::getBitsSet. And fix an off-by-one bug in "wrapping" mode.

llvm-svn: 46978
 2008-02-11 23:45:14 +00:00
Ted Kremenek
dbef529071 The factories for ImutAVLTree/ImmutableSet/ImmutableMap now take an (optional) 
BumpPtrAllocator argument to their constructors.  This BumpPtrAllocator
will be used to allocate trees.  If no BumpPtrAllocator is provided, one
is created (as before).

llvm-svn: 46975
 2008-02-11 23:11:12 +00:00
Scott Michel
9756189233 Added blurb for CellSPU progress 
llvm-svn: 46968
 2008-02-11 21:05:47 +00:00
Duncan Sands
7916fcbe27 Generalize the handling of call and return arguments, 
in preparation for apint support.  These changes are
intended to have no functional effect.

llvm-svn: 46967
 2008-02-11 20:58:28 +00:00
Dan Gohman
243661fb31 From Chris' review: use isa instead of explicitly using classof. 
llvm-svn: 46964
 2008-02-11 19:00:34 +00:00