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4de2c76542
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1557 Commits

Author SHA1 Message Date
Chris Lattner
4de2c76542 Fix m_Not and m_Neg to not match random ConstantInt's. Before 
these would try hard to match constants by inverting the bits
and recursively matching.  There are two problems with this:
1) some patterns would match when we didn't want them to (theoretical)
2) this is insanely expensive to do, and most often pointless.

This was apparently useful in just 2 instcombine cases, which I
added code to handle explicitly.  This change speeds up 'opt'
time on 176.gcc by 1% and produces bitwise identical code.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123518 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 05:52:27 +00:00
Chris Lattner
998ef4a92d switch the second scalarrepl pass to use SSAUpdater. We run two scalarrepl passes: one 
early in the cleanup code and one late interlaced with the inliner.  The second one is
important because inlining and other scalar optzns can unpin allocas, allowing them to 
be split up and promoted.  While important for performance, this is also relatively
rare, and we would previously force a (non-lazy) computation of DomFrontiers, which 
happened even if nothing became unpinned.

With this patch, the first pass of scalarrepl still promotes the vast bulk of allocas
in programs, but hte second pass has changed to use SSAUpdater, which is more "sparse"
and lazy.  This speeds up opt -O3 time on kimwitu++ (a c++ app) by about 1%.  The
numbers are interesting: the first pass promotes ~17500 allocas.  The second pass
promotes about 1600.  For non-C++ codes, the compile time win should be greater, 
because the second pass of scalarrepl does less.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123437 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 08:21:08 +00:00
Owen Anderson
c5f608b49c Rather than doing early instcombine, try doing early CSE instead. This should still handle 
most important simplifications, as well as resolving phase ordering issues where instcombine
would inhibit important CSE'ing opportunities, for instance on BitBench/drop3.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123418 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 00:41:11 +00:00
Owen Anderson
68a659d423 Don't bother conditionalizing the use of SROA in -O1 mode. We're already running it unconditionally 
later in the pipeline.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123416 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 00:36:40 +00:00
Michael J. Spencer
9df536ca78 Support/Path: Deprecate PathV1::IsSymlink and replace all uses with PathV2::is_symlink. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123345 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-12 23:55:06 +00:00
Michael J. Spencer
218dc3e2fe Support/Path: Deprecate PathV1::isDirectory and replace all uses with PathV2::is_directory. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123209 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-11 01:21:55 +00:00
Michael J. Spencer
54453f2978 Support/Path: Deprecate PathV1::exists and replace all uses with PathV2::fs::exists. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123151 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-10 02:34:23 +00:00
Bob Wilson
bfb7dd9e9e Revert svn 122743, removing the instcombine pass that was replaced by earlycse. 
My i386 llvm-gcc nightly tester found a regression for
SingleSource/Benchmarks/McGill/chomp that a bisect blamed on 122743.
That seems strange but apparently the combination of earlycse and instcombine
did something bad.  Chris says he intended to remove the instcombine pass, so
let's go ahead and try that.  We'll see if there are any performance losses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122907 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-05 21:16:50 +00:00
Chris Lattner
be478819cb Fix PR8906: -fno-builtin should disable loop-idiom recognition. 
It forms memset and memcpy's, and will someday form popcount and
other stuff.  All of this is bad when compiling the implementation
of memset, memcpy, popcount, etc.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122854 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-05 01:03:32 +00:00
Evan Cheng
cc3d8e3c22 Undo what looks like accidental removal of an instcombine pass in r122740. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122743 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 07:53:18 +00:00
Chris Lattner
db5f5e64fe Turn on earlycse by default. This seems to be a small performance 
improvement in the generated code, and speeds up 'opt -std-compile-opts'
compile time on 176.gcc from 24.84s to 23.2s (about 7%).

This also resolves a specific code quality issue in rdar://7352081 which
was generating poor code for:

int t(int a, int b) {
  if (a & b & 1)
    return a & b;
  return 3;
}



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122740 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 06:19:09 +00:00
Chris Lattner
61a10a0dc9 Enhance ScopedHashTable to allow it to take an allocator argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122721 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 01:29:37 +00:00
Chris Lattner
0fd8ee4995 turn on memset idiom recognition by default. Though there are still lots of 
limitations, this kicks in dozens of times in the 4 specfp2000 benchmarks, 
and hundreds of times in the int part.  It also kicks in hundreds of times 
in multisource.

This kicks in right before loop deletion, which has the pleasant effect of
deleting loops that *just* do a memset.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122664 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 20:39:18 +00:00
Michael J. Spencer
4213618088 Support/Path: Deprecate Path::hasMagicNumber and replace all uses with fs::has_magic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122589 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 01:49:21 +00:00
Michael J. Spencer
bf0184b684 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122588 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 01:49:10 +00:00
Michael J. Spencer
628467ef1f Support/PathV2: Implement has_magic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122587 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 01:49:01 +00:00
Michael J. Spencer
9170a0f02d Support/PathV1: Deprecate GetRootDirectory. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122580 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-27 03:21:41 +00:00
Chris Lattner
c0d5496b8a add methods to IRBuilder to create memcpy/memset/memmove. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122571 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-26 22:49:25 +00:00
Michael J. Spencer
43ee29d418 Support/PathV1: Deprecate makeAbsolute and remove Unix impl because it annoys people. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122553 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-25 20:10:11 +00:00
Owen Anderson
3b77f56194 Revert r122114 (CallbackVH observing use-list changes) because it caused severe slowdowns on the Linux self-host configuration. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122279 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-20 22:28:03 +00:00
Bill Wendling
d7a0852464 This is still used and issuing an annoying warning. Don't deprecate something in 
the library unless *all* uses have been converted over to the new form.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122267 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-20 21:14:18 +00:00
Michael J. Spencer
c41f4de754 Fix spelling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122244 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-20 13:30:37 +00:00
Chris Lattner
cc3029acdd add a version of IRBuilder::SetInsertPoint that takes an instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122180 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-19 19:16:22 +00:00
Michael J. Spencer
c3207d8b5a Support/PathV1: Clarify deprecation warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122159 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 22:23:24 +00:00
Michael J. Spencer
7385509101 Support/PathV1: Deprecate get{Basename,Dirname,Suffix}. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122157 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 22:23:07 +00:00
Eric Christopher
9390983b08 Header warning patrol. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122152 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 10:54:29 +00:00
Owen Anderson
fffa863536 Revert r122143 through r122140, which collectively broke the LLVMC tests on 
the buildbots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122149 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 07:37:18 +00:00
Michael J. Spencer
47e8ae6324 Support/PathV1: Clarify deprecation warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122143 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 04:13:54 +00:00
Michael J. Spencer
b9c767cce5 Support/PathV1: Deprecate get{Basename,Dirname,Suffix}. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122141 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 04:13:36 +00:00
Michael J. Spencer
b3127bb06a Support/PathV1: Deprecate getLast. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122116 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 00:19:10 +00:00
Owen Anderson
a479b23256 Add support to CallbackVH to receive notification when a Value's use-list changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122114 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-18 00:07:15 +00:00
Michael J. Spencer
48c166bceb Fix 80 col. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122089 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 21:32:47 +00:00
Michael J. Spencer
965841cfe4 Support/Path: Deprecate PathV1::isAbsolute. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122086 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 21:21:31 +00:00
Benjamin Kramer
d53f3c864b Pass StringRefs by value, for consistency. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122074 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 18:19:06 +00:00
Michael J. Spencer
cc2a8fefb6 Support: Rename Path.h to PathV1.h and add a new Path.h that includes both V1 and V2. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122065 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 17:22:36 +00:00
Chris Lattner
e27db74a60 improve switch formation to handle small range 
comparisons formed by comparisons.  For example,
this:

void foo(unsigned x) {
  if (x == 0 || x == 1 || x == 3 || x == 4 || x == 6) 
    bar();
}

compiles into:

_foo:                                   ## @foo
## BB#0:                                ## %entry
	cmpl	$6, %edi
	ja	LBB0_2
## BB#1:                                ## %entry
	movl	%edi, %eax
	movl	$91, %ecx
	btq	%rax, %rcx
	jb	LBB0_3

instead of:

_foo:                                   ## @foo
## BB#0:                                ## %entry
	cmpl	$2, %edi
	jb	LBB0_4
## BB#1:                                ## %switch.early.test
	cmpl	$6, %edi
	ja	LBB0_3
## BB#2:                                ## %switch.early.test
	movl	%edi, %eax
	movl	$88, %ecx
	btq	%rax, %rcx
	jb	LBB0_4

This catches a bunch of cases in GCC, which look like this:

 %804 = load i32* @which_alternative, align 4, !tbaa !0
 %805 = icmp ult i32 %804, 2
 %806 = icmp eq i32 %804, 3
 %or.cond121 = or i1 %805, %806
 %807 = icmp eq i32 %804, 4
 %or.cond124 = or i1 %or.cond121, %807
 br i1 %or.cond124, label %.thread, label %808

turning this into a range comparison.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122045 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 06:20:15 +00:00
Michael J. Spencer
3ff9563c3e MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121958 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-16 03:29:14 +00:00
Rafael Espindola
c42a7754bb Typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121906 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 22:33:06 +00:00
Rafael Espindola
b35d56c2fe Generalize an assert. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121851 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 07:12:24 +00:00
Nick Lewycky
c79637c3cd Remove dead header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121463 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-10 05:12:54 +00:00
Michael J. Spencer
333ad3f2bf Fix whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121382 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-09 17:37:32 +00:00
Michael J. Spencer
61187dd0ad Support/FileSystem: Change file_status predicate functions that cannot fail to 
return their result instead of an error_code. Also add some missing predicate
functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121380 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-09 17:37:02 +00:00
Michael J. Spencer
333fb04506 Support/MemoryBuffer: Replace all uses of std::string *ErrMsg with error_code &ec. And fix clients. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121379 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-09 17:36:48 +00:00
Michael J. Spencer
c20beb9cc5 Support: Remove Alarm. It is unused (via local grep and google code search). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121160 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 18:41:59 +00:00
Michael J. Spencer
12ccf67457 Support/PathV2: Remove const from bool return types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121157 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 18:12:07 +00:00
Michael J. Spencer
6511988cd4 Fix spelling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121156 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 18:11:54 +00:00
Michael J. Spencer
a35c1b9431 Support: Remove DynamicLinker.h. It is unused and unimplemented. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121155 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 18:11:38 +00:00
Michael J. Spencer
5029159fbe Support/PathV2: Change most functions in the path namespace to return their work 
via their return value instead of an out parameter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121149 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 17:04:04 +00:00
Michael J. Spencer
936671b2ea Support/PathV2: Remove the error_code return type from all functions in the path 
namespace. None of them return anything except for success anyway. These will be
converted to returning their result soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121109 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 03:57:37 +00:00
Michael J. Spencer
ee271d8758 Support/PathV2: Move make_absolute from path to fs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121108 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 03:57:17 +00:00