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Author SHA1 Message Date
Michael J. Spencer
e7a820c208 UnRevert "Revert "Archive: Replace all internal uses of PathV1 with PathV2. The external API still uses PathV1."" 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123605 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 23:39:59 +00:00
Michael J. Spencer
283d49c766 Fix rename. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123604 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 22:18:41 +00:00
Nick Lewycky
33d84007b5 Test for lazy value info's ability to prove the absense of NULLs in pointers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123601 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 21:57:20 +00:00
Michael J. Spencer
ddbb3bcdd7 Make everyone happy this time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123599 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 21:34:34 +00:00
Anton Korobeynikov
1d8334eabc Provide instruction sizes for ARMv5 variants of MUL instructions. 
This fixes PR8987

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123598 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 21:28:33 +00:00
Anders Carlsson
5822b86e4d Update README.txt to remove the DAE enhancement. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123597 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 21:26:15 +00:00
Anders Carlsson
0599c6bb3c Teach DAE to look for functions whose arguments are unused, and change all callers to pass in an undefvalue instead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123596 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 21:25:33 +00:00
Michael J. Spencer
3c98e14bc9 UnRevert "Revert the archive part of "Support/PathV2: Add identify_magic."" 
This reverts commit dd103021a8.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123595 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 21:13:51 +00:00
Michael J. Spencer
6990433b56 Try and fix this test. For some reason llvm-ar thinks that the file exists when 
it shouldn't, but I have no way to verify that it doesn't actually exist on the
buildbot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123594 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 20:52:58 +00:00
Michael J. Spencer
dd103021a8 Revert the archive part of "Support/PathV2: Add identify_magic." 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123593 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 19:56:42 +00:00
Rafael Espindola
1c10db3da9 Update tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123591 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 18:02:57 +00:00
Chris Lattner
396a0567cf tidy up a comment, as suggested by duncan 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123590 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 17:46:19 +00:00
Rafael Espindola
7010401c6b Only put unnamed_addr constants in mergeable sections. Fixes PR8297. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123585 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 17:19:34 +00:00
Rafael Espindola
d6e5cbc842 Don't merge two constants if we care about the address of both. 
This fixes the original testcase in PR8927. It also causes a clang
binary built with a patched clang to increase in size by 0.21%.

We can probably get some of the size back by writing a pass that
detects that a global never has its pointer compared and adds
unnamed_addr to it (maybe extend global opt). It is also possible that
there are some other cases clang could add unnamed_addr to.

I will investigate extending globalopt next.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123584 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 17:05:09 +00:00
Jay Foad
1ed26acc58 Simplify the construction and destruction of Uses. Simplify 
User::dropHungOffUses().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123580 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 15:30:52 +00:00
Owen Anderson
29c8419f91 Reduce and merge testcases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123579 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 09:13:31 +00:00
Chris Lattner
dec28ceb02 fix PR8514, a bug where the "heroic" transformation of shift/and 
into and/shift would cause nodes to move around and a dangling pointer
to happen.  The code tried to avoid this with a HandleSDNode, but 
got the details wrong.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123578 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 08:48:11 +00:00
Jay Foad
65762b5494 Remove unnecessary specialization OperandTraits<User>. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123577 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 08:23:16 +00:00
Jay Foad
bdbe342e86 Move the implementation of the User class into a new source file, 
User.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123575 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 08:10:57 +00:00
Chris Lattner
28252b6f0a fix PR8932, a case where arg promotion could infinitely promote. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123574 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 08:09:24 +00:00
Chris Lattner
54cfe7e027 simplify a little 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123573 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 07:11:21 +00:00
Chris Lattner
b0daffc609 add some commentary 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123572 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 06:39:44 +00:00
Chris Lattner
7e9b427c87 if an alloca is only ever accessed as a unit, and is accessed with load/store instructions, 
then don't try to decimate it into its individual pieces.  This will just make a mess of the
IR and is pointless if none of the elements are individually accessed.  This was generating
really terrible code for std::bitset (PR8980) because it happens to be lowered by clang
as an {[8 x i8]} structure instead of {i64}.

The testcase now is optimized to:

define i64 @test2(i64 %X) {
  br label %L2

L2:                                               ; preds = %0
  ret i64 %X
}

before we generated:

define i64 @test2(i64 %X) {
  %sroa.store.elt = lshr i64 %X, 56
  %1 = trunc i64 %sroa.store.elt to i8
  %sroa.store.elt8 = lshr i64 %X, 48
  %2 = trunc i64 %sroa.store.elt8 to i8
  %sroa.store.elt9 = lshr i64 %X, 40
  %3 = trunc i64 %sroa.store.elt9 to i8
  %sroa.store.elt10 = lshr i64 %X, 32
  %4 = trunc i64 %sroa.store.elt10 to i8
  %sroa.store.elt11 = lshr i64 %X, 24
  %5 = trunc i64 %sroa.store.elt11 to i8
  %sroa.store.elt12 = lshr i64 %X, 16
  %6 = trunc i64 %sroa.store.elt12 to i8
  %sroa.store.elt13 = lshr i64 %X, 8
  %7 = trunc i64 %sroa.store.elt13 to i8
  %8 = trunc i64 %X to i8
  br label %L2

L2:                                               ; preds = %0
  %9 = zext i8 %1 to i64
  %10 = shl i64 %9, 56
  %11 = zext i8 %2 to i64
  %12 = shl i64 %11, 48
  %13 = or i64 %12, %10
  %14 = zext i8 %3 to i64
  %15 = shl i64 %14, 40
  %16 = or i64 %15, %13
  %17 = zext i8 %4 to i64
  %18 = shl i64 %17, 32
  %19 = or i64 %18, %16
  %20 = zext i8 %5 to i64
  %21 = shl i64 %20, 24
  %22 = or i64 %21, %19
  %23 = zext i8 %6 to i64
  %24 = shl i64 %23, 16
  %25 = or i64 %24, %22
  %26 = zext i8 %7 to i64
  %27 = shl i64 %26, 8
  %28 = or i64 %27, %25
  %29 = zext i8 %8 to i64
  %30 = or i64 %29, %28
  ret i64 %30
}

In this case, instcombine was able to eliminate the nonsense, but in PR8980 enough
PHIs are in play that instcombine backs off.  It's better to not generate this stuff
in the first place.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123571 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 06:18:28 +00:00
Chris Lattner
7072853279 Use an irbuilder to get some trivial constant folding when doing a store 
of a constant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123570 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 05:58:24 +00:00
Chris Lattner
6eb6116d52 remove a dead check, this was needed before we had an explicit veto on uses of phis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123569 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 05:37:55 +00:00
Chris Lattner
192228edb1 enhance FoldOpIntoPhi in instcombine to try harder when a phi has 
multiple uses.  In some cases, all the uses are the same operation,
so instcombine can go ahead and promote the phi.  In the testcase
this pushes an add out of the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123568 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 05:28:59 +00:00
Evan Cheng
df55fea807 Spill R4 if it's going to be used to restore SP from FP. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123567 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 05:14:33 +00:00
Chris Lattner
9922ccf4b4 remove the AllowAggressive argument to FoldOpIntoPhi. It is forced to false in the 
first line of the function because it isn't a good idea, even for compares.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123566 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 05:14:26 +00:00
Chris Lattner
7dfe8fd96c more cleanups: use the IR builder. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123565 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 05:08:00 +00:00
Chris Lattner
5aac83288c tidy up code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123564 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 04:37:29 +00:00
Owen Anderson
66f708f7e5 Improve the safety of my globalopt enhancement by ensuring that the bitcast 
of the stored value to the new store type is always.  Also, add a testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123563 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 04:33:33 +00:00
Chris Lattner
156eb0a569 fix PR8983, a broken assertion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123562 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 03:43:53 +00:00
Venkatraman Govindaraju
c1a62834a2 Implement AnalyzeBranch in Sparc Backend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123561 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 03:15:11 +00:00
Chris Lattner
9cd3da47f9 fix PR8981, a crash trying to form a conditional inc with a floating point compare. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123560 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 02:56:53 +00:00
Chris Lattner
b99fdee325 reapply my fix for PR8961 with a tweak to properly handle 
multi-instruction sequences like calls.  Many thanks to Jakob for
finding a testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123559 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 02:27:38 +00:00
Chris Lattner
d5f656f48b simplify this code, it is still broken but will follow up on llvm-commits. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123558 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 02:05:10 +00:00
Michael J. Spencer
c850965ec0 Revert "Archive: Replace all internal uses of PathV1 with PathV2. The external API still uses PathV1." 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123557 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 01:43:22 +00:00
Chandler Carruth
cad33c624e Simplify a README.txt entry significantly to expose the core issue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123556 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 01:40:23 +00:00
Chris Lattner
02efda4b4e one of michael's recent patches broke this, temporarily disable 
it so the bots go green


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123555 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 01:04:49 +00:00
Chris Lattner
0092b1142f remove the partial specialization pass. It is unmaintained and has bugs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123554 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 00:27:10 +00:00
Michael J. Spencer
a7a71a375c Archive: Fix spelling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123552 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 21:43:45 +00:00
Michael J. Spencer
770772e831 Archive: Replace all internal uses of PathV1 with PathV2. The external API still uses PathV1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123551 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 21:43:37 +00:00
Michael J. Spencer
36852d3681 Support/GraphWriter: Replace all internal uses of PathV1 with PathV2. The external API still uses PathV1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123550 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 21:43:25 +00:00
Benjamin Kramer
5df5a22d1a Add an assert so we don't silently miscompile ctpop for bit widths > 128. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123549 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 21:19:37 +00:00
Michael J. Spencer
28f0ed5c9d Support/PathV2: Add identify_magic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123548 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 20:39:36 +00:00
Benjamin Kramer
b6516aeef1 Reimplement CTPOP legalization with the "best" algorithm from 
http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel

In a silly microbenchmark on a 65 nm core2 this is 1.5x faster than the old
code in 32 bit mode and about 2x faster in 64 bit mode. It's also a lot shorter,
especially when counting 64 bit population on a 32 bit target.

I hope this is fast enough to replace Kernighan-style counting loops even when
the input is rather sparse.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123547 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 20:30:30 +00:00
Michael J. Spencer
248f9f2807 Unittests/Support/Path: Tweak test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123546 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 18:52:49 +00:00
Michael J. Spencer
b33594be3d Support/PathV2: Implement has_magic in terms of get_magic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123545 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 18:52:41 +00:00
Michael J. Spencer
d6cdf1d3cb Support/PathV2: Implement get_magic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123544 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 18:52:33 +00:00
Nick Lewycky
cd7f0a1a7f Add missing whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123543 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-15 18:42:52 +00:00