oota-llvm.git
13 years agoSuppress warning "switch statement contains 'default' but no 'case' labels" on MSVC.
Francois Pichet [Mon, 17 Jan 2011 02:07:17 +0000 (02:07 +0000)]
Suppress warning "switch statement contains 'default' but no 'case' labels" on MSVC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123610 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoEliminate the use of dominance frontiers in PromoteMemToReg. In addition to
Cameron Zwarich [Mon, 17 Jan 2011 01:08:59 +0000 (01:08 +0000)]
Eliminate the use of dominance frontiers in PromoteMemToReg. In addition to
eliminating a potentially quadratic data structure, this also gives a 17%
speedup when running -scalarrepl on test-suite + SPEC2000 + SPEC2006. My initial
experiment gave a greater speedup around 25%, but I moved the dominator tree
level computation from dominator tree construction to PromoteMemToReg.

Since this approach to computing IDFs has a much lower overhead than the old
code using precomputed DFs, it is worth looking at using this new code for the
second scalarrepl pass as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123609 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoUnRevert "Revert "Archive: Replace all internal uses of PathV1 with PathV2. The exter...
Michael J. Spencer [Sun, 16 Jan 2011 23:39:59 +0000 (23:39 +0000)]
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

13 years agoFix rename.
Michael J. Spencer [Sun, 16 Jan 2011 22:18:41 +0000 (22:18 +0000)]
Fix rename.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123604 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoTest for lazy value info's ability to prove the absense of NULLs in pointers.
Nick Lewycky [Sun, 16 Jan 2011 21:57:20 +0000 (21:57 +0000)]
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

13 years agoMake everyone happy this time.
Michael J. Spencer [Sun, 16 Jan 2011 21:34:34 +0000 (21:34 +0000)]
Make everyone happy this time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123599 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoProvide instruction sizes for ARMv5 variants of MUL instructions.
Anton Korobeynikov [Sun, 16 Jan 2011 21:28:33 +0000 (21:28 +0000)]
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

13 years agoUpdate README.txt to remove the DAE enhancement.
Anders Carlsson [Sun, 16 Jan 2011 21:26:15 +0000 (21:26 +0000)]
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

13 years agoTeach DAE to look for functions whose arguments are unused, and change all callers...
Anders Carlsson [Sun, 16 Jan 2011 21:25:33 +0000 (21:25 +0000)]
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

13 years agoUnRevert "Revert the archive part of "Support/PathV2: Add identify_magic.""
Michael J. Spencer [Sun, 16 Jan 2011 21:13:51 +0000 (21:13 +0000)]
UnRevert "Revert the archive part of "Support/PathV2: Add identify_magic.""

This reverts commit dd103021a889a986a181ce36ed7b0e8dc9b645e1.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123595 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoTry and fix this test. For some reason llvm-ar thinks that the file exists when
Michael J. Spencer [Sun, 16 Jan 2011 20:52:58 +0000 (20:52 +0000)]
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

13 years agoRevert the archive part of "Support/PathV2: Add identify_magic."
Michael J. Spencer [Sun, 16 Jan 2011 19:56:42 +0000 (19:56 +0000)]
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

13 years agoUpdate tests.
Rafael Espindola [Sun, 16 Jan 2011 18:02:57 +0000 (18:02 +0000)]
Update tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123591 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agotidy up a comment, as suggested by duncan
Chris Lattner [Sun, 16 Jan 2011 17:46:19 +0000 (17:46 +0000)]
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

13 years agoOnly put unnamed_addr constants in mergeable sections. Fixes PR8297.
Rafael Espindola [Sun, 16 Jan 2011 17:19:34 +0000 (17:19 +0000)]
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

13 years agoDon't merge two constants if we care about the address of both.
Rafael Espindola [Sun, 16 Jan 2011 17:05:09 +0000 (17:05 +0000)]
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

13 years agoSimplify the construction and destruction of Uses. Simplify
Jay Foad [Sun, 16 Jan 2011 15:30:52 +0000 (15:30 +0000)]
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

13 years agoReduce and merge testcases.
Owen Anderson [Sun, 16 Jan 2011 09:13:31 +0000 (09:13 +0000)]
Reduce and merge testcases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123579 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agofix PR8514, a bug where the "heroic" transformation of shift/and
Chris Lattner [Sun, 16 Jan 2011 08:48:11 +0000 (08:48 +0000)]
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

13 years agoRemove unnecessary specialization OperandTraits<User>.
Jay Foad [Sun, 16 Jan 2011 08:23:16 +0000 (08:23 +0000)]
Remove unnecessary specialization OperandTraits<User>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123577 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoMove the implementation of the User class into a new source file,
Jay Foad [Sun, 16 Jan 2011 08:10:57 +0000 (08:10 +0000)]
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

13 years agofix PR8932, a case where arg promotion could infinitely promote.
Chris Lattner [Sun, 16 Jan 2011 08:09:24 +0000 (08:09 +0000)]
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

13 years agosimplify a little
Chris Lattner [Sun, 16 Jan 2011 07:11:21 +0000 (07:11 +0000)]
simplify a little

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123573 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoadd some commentary
Chris Lattner [Sun, 16 Jan 2011 06:39:44 +0000 (06:39 +0000)]
add some commentary

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123572 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoif an alloca is only ever accessed as a unit, and is accessed with load/store instruc...
Chris Lattner [Sun, 16 Jan 2011 06:18:28 +0000 (06:18 +0000)]
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

13 years agoUse an irbuilder to get some trivial constant folding when doing a store
Chris Lattner [Sun, 16 Jan 2011 05:58:24 +0000 (05:58 +0000)]
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

13 years agoremove a dead check, this was needed before we had an explicit veto on uses of phis.
Chris Lattner [Sun, 16 Jan 2011 05:37:55 +0000 (05:37 +0000)]
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

13 years agoenhance FoldOpIntoPhi in instcombine to try harder when a phi has
Chris Lattner [Sun, 16 Jan 2011 05:28:59 +0000 (05:28 +0000)]
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

13 years agoSpill R4 if it's going to be used to restore SP from FP.
Evan Cheng [Sun, 16 Jan 2011 05:14:33 +0000 (05:14 +0000)]
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

13 years agoremove the AllowAggressive argument to FoldOpIntoPhi. It is forced to false in the
Chris Lattner [Sun, 16 Jan 2011 05:14:26 +0000 (05:14 +0000)]
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

13 years agomore cleanups: use the IR builder.
Chris Lattner [Sun, 16 Jan 2011 05:08:00 +0000 (05:08 +0000)]
more cleanups: use the IR builder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123565 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agotidy up code.
Chris Lattner [Sun, 16 Jan 2011 04:37:29 +0000 (04:37 +0000)]
tidy up code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123564 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoImprove the safety of my globalopt enhancement by ensuring that the bitcast
Owen Anderson [Sun, 16 Jan 2011 04:33:33 +0000 (04:33 +0000)]
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

13 years agofix PR8983, a broken assertion.
Chris Lattner [Sun, 16 Jan 2011 03:43:53 +0000 (03:43 +0000)]
fix PR8983, a broken assertion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123562 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoImplement AnalyzeBranch in Sparc Backend.
Venkatraman Govindaraju [Sun, 16 Jan 2011 03:15:11 +0000 (03:15 +0000)]
Implement AnalyzeBranch in Sparc Backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123561 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agofix PR8981, a crash trying to form a conditional inc with a floating point compare.
Chris Lattner [Sun, 16 Jan 2011 02:56:53 +0000 (02:56 +0000)]
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

13 years agoreapply my fix for PR8961 with a tweak to properly handle
Chris Lattner [Sun, 16 Jan 2011 02:27:38 +0000 (02:27 +0000)]
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

13 years agosimplify this code, it is still broken but will follow up on llvm-commits.
Chris Lattner [Sun, 16 Jan 2011 02:05:10 +0000 (02:05 +0000)]
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

13 years agoRevert "Archive: Replace all internal uses of PathV1 with PathV2. The external API...
Michael J. Spencer [Sun, 16 Jan 2011 01:43:22 +0000 (01:43 +0000)]
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

13 years agoSimplify a README.txt entry significantly to expose the core issue.
Chandler Carruth [Sun, 16 Jan 2011 01:40:23 +0000 (01:40 +0000)]
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

13 years agoone of michael's recent patches broke this, temporarily disable
Chris Lattner [Sun, 16 Jan 2011 01:04:49 +0000 (01:04 +0000)]
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

13 years agoremove the partial specialization pass. It is unmaintained and has bugs.
Chris Lattner [Sun, 16 Jan 2011 00:27:10 +0000 (00:27 +0000)]
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

13 years agoArchive: Fix spelling.
Michael J. Spencer [Sat, 15 Jan 2011 21:43:45 +0000 (21:43 +0000)]
Archive: Fix spelling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123552 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoArchive: Replace all internal uses of PathV1 with PathV2. The external API still...
Michael J. Spencer [Sat, 15 Jan 2011 21:43:37 +0000 (21:43 +0000)]
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

13 years agoSupport/GraphWriter: Replace all internal uses of PathV1 with PathV2. The external...
Michael J. Spencer [Sat, 15 Jan 2011 21:43:25 +0000 (21:43 +0000)]
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

13 years agoAdd an assert so we don't silently miscompile ctpop for bit widths > 128.
Benjamin Kramer [Sat, 15 Jan 2011 21:19:37 +0000 (21:19 +0000)]
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

13 years agoSupport/PathV2: Add identify_magic.
Michael J. Spencer [Sat, 15 Jan 2011 20:39:36 +0000 (20:39 +0000)]
Support/PathV2: Add identify_magic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123548 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoReimplement CTPOP legalization with the "best" algorithm from
Benjamin Kramer [Sat, 15 Jan 2011 20:30:30 +0000 (20:30 +0000)]
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

13 years agoUnittests/Support/Path: Tweak test.
Michael J. Spencer [Sat, 15 Jan 2011 18:52:49 +0000 (18:52 +0000)]
Unittests/Support/Path: Tweak test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123546 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoSupport/PathV2: Implement has_magic in terms of get_magic.
Michael J. Spencer [Sat, 15 Jan 2011 18:52:41 +0000 (18:52 +0000)]
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

13 years agoSupport/PathV2: Implement get_magic.
Michael J. Spencer [Sat, 15 Jan 2011 18:52:33 +0000 (18:52 +0000)]
Support/PathV2: Implement get_magic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123544 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAdd missing whitespace.
Nick Lewycky [Sat, 15 Jan 2011 18:42:52 +0000 (18:42 +0000)]
Add missing whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123543 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoMake constmerge a two-pass algorithm so that it won't miss merging
Nick Lewycky [Sat, 15 Jan 2011 18:14:21 +0000 (18:14 +0000)]
Make constmerge a two-pass algorithm so that it won't miss merging
opporuntities. Fixes PR8978.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123541 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoMake config.h.cmake similar to config.h.in
Oscar Fuentes [Sat, 15 Jan 2011 13:35:37 +0000 (13:35 +0000)]
Make config.h.cmake similar to config.h.in

Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123539 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoTry to unbreak selfhost.
Benjamin Kramer [Sat, 15 Jan 2011 11:25:34 +0000 (11:25 +0000)]
Try to unbreak selfhost.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123537 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAdd a cache that protects mergefunc's internals from more surprises in DenseSet.
Nick Lewycky [Sat, 15 Jan 2011 10:16:23 +0000 (10:16 +0000)]
Add a cache that protects mergefunc's internals from more surprises in DenseSet.

Also, replace tabs with spaces. Yes, it's 2011.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123535 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoTeach LazyValueInfo that allocas aren't NULL. Over all of llvm-test, this saves
Nick Lewycky [Sat, 15 Jan 2011 09:16:12 +0000 (09:16 +0000)]
Teach LazyValueInfo that allocas aren't NULL. Over all of llvm-test, this saves
half a million non-local queries, each of which would otherwise have triggered a
linear scan over a basic block.

Also fix a fixme for memory intrinsics which dereference pointers. With this,
we prove that a pointer is non-null because it was dereferenced by an intrinsic
112 times in llvm-test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123533 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAdd a clarification about merging constants with and without unnamed_addr.
Rafael Espindola [Sat, 15 Jan 2011 08:20:57 +0000 (08:20 +0000)]
Add a clarification about merging constants with and without unnamed_addr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123530 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAllow unnamed_addr on declarations.
Rafael Espindola [Sat, 15 Jan 2011 08:15:00 +0000 (08:15 +0000)]
Allow unnamed_addr on declarations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123529 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agotemporarily revert r123526. While working on a follow-on patch I
Chris Lattner [Sat, 15 Jan 2011 07:51:19 +0000 (07:51 +0000)]
temporarily revert r123526.  While working on a follow-on patch I
realize that ConstantFoldTerminator doesn't preserve dominfo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123527 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agofix rdar://8785296 - -fcatch-undefined-behavior generates inefficient code
Chris Lattner [Sat, 15 Jan 2011 07:36:13 +0000 (07:36 +0000)]
fix rdar://8785296 - -fcatch-undefined-behavior generates inefficient code

The basic issue is that isel (very reasonably!) expects conditional branches
to be folded, so CGP leaving around a bunch dead computation feeding
conditional branches isn't such a good idea.  Just fold branches on constants
into unconditional branches.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123526 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agosimplify code, no functionality change.
Chris Lattner [Sat, 15 Jan 2011 07:29:01 +0000 (07:29 +0000)]
simplify code, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123525 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoNow that instruction optzns can update the iterator as they go, we can
Chris Lattner [Sat, 15 Jan 2011 07:25:29 +0000 (07:25 +0000)]
Now that instruction optzns can update the iterator as they go, we can
have objectsize folding recursively simplify away their result when it
folds.  It is important to catch this here, because otherwise we won't
eliminate the cross-block values at isel and other times.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123524 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agomake the current instruction iterator an ivar, allowing xforms that
Chris Lattner [Sat, 15 Jan 2011 07:14:54 +0000 (07:14 +0000)]
make the current instruction iterator an ivar, allowing xforms that
potentially invalidate it (like inline asm lowering) to be sunk into
their proper place, cleaning up a ton of code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123523 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoimplement an instcombine xform that canonicalizes casts outside of and-with-constant...
Chris Lattner [Sat, 15 Jan 2011 06:32:33 +0000 (06:32 +0000)]
implement an instcombine xform that canonicalizes casts outside of and-with-constant operations.
This fixes rdar://8808586 which observed that we used to compile:

union xy {
        struct x { _Bool b[15]; } x;
        __attribute__((packed))
        struct y {
                __attribute__((packed)) unsigned long b0to7;
                __attribute__((packed)) unsigned int b8to11;
                __attribute__((packed)) unsigned short b12to13;
                __attribute__((packed)) unsigned char b14;
        } y;
};

struct x
foo(union xy *xy)
{
        return xy->x;
}

into:

_foo:                                   ## @foo
movq (%rdi), %rax
movabsq $1095216660480, %rcx    ## imm = 0xFF00000000
andq %rax, %rcx
movabsq $-72057594037927936, %rdx ## imm = 0xFF00000000000000
andq %rax, %rdx
movzbl %al, %esi
orq %rdx, %rsi
movq %rax, %rdx
andq $65280, %rdx            ## imm = 0xFF00
orq %rsi, %rdx
movq %rax, %rsi
andq $16711680, %rsi         ## imm = 0xFF0000
orq %rdx, %rsi
movl %eax, %edx
andl $-16777216, %edx        ## imm = 0xFFFFFFFFFF000000
orq %rsi, %rdx
orq %rcx, %rdx
movabsq $280375465082880, %rcx  ## imm = 0xFF0000000000
movq %rax, %rsi
andq %rcx, %rsi
orq %rdx, %rsi
movabsq $71776119061217280, %r8 ## imm = 0xFF000000000000
andq %r8, %rax
orq %rsi, %rax
movzwl 12(%rdi), %edx
movzbl 14(%rdi), %esi
shlq $16, %rsi
orl %edx, %esi
movq %rsi, %r9
shlq $32, %r9
movl 8(%rdi), %edx
orq %r9, %rdx
andq %rdx, %rcx
movzbl %sil, %esi
shlq $32, %rsi
orq %rcx, %rsi
movl %edx, %ecx
andl $-16777216, %ecx        ## imm = 0xFFFFFFFFFF000000
orq %rsi, %rcx
movq %rdx, %rsi
andq $16711680, %rsi         ## imm = 0xFF0000
orq %rcx, %rsi
movq %rdx, %rcx
andq $65280, %rcx            ## imm = 0xFF00
orq %rsi, %rcx
movzbl %dl, %esi
orq %rcx, %rsi
andq %r8, %rdx
orq %rsi, %rdx
ret

We now compile this into:

_foo:                                   ## @foo
## BB#0:                                ## %entry
movzwl 12(%rdi), %eax
movzbl 14(%rdi), %ecx
shlq $16, %rcx
orl %eax, %ecx
shlq $32, %rcx
movl 8(%rdi), %edx
orq %rcx, %rdx
movq (%rdi), %rax
ret

A small improvement :-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123520 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agofix typo
Chris Lattner [Sat, 15 Jan 2011 06:27:35 +0000 (06:27 +0000)]
fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123519 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFix m_Not and m_Neg to not match random ConstantInt's. Before
Chris Lattner [Sat, 15 Jan 2011 05:52:27 +0000 (05:52 +0000)]
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

13 years agoone more instcombine variant that is needed to work with future changes,
Chris Lattner [Sat, 15 Jan 2011 05:50:18 +0000 (05:50 +0000)]
one more instcombine variant that is needed to work with future changes,
no functionality change currently.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123517 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agofix typo
Chris Lattner [Sat, 15 Jan 2011 05:42:47 +0000 (05:42 +0000)]
fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123516 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoCatch ~x < cst just like ~x < ~y, we currently handle this through
Chris Lattner [Sat, 15 Jan 2011 05:41:33 +0000 (05:41 +0000)]
Catch ~x < cst  just like ~x < ~y, we currently handle this through
means that are about to disappear.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123515 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoreduce indentation
Chris Lattner [Sat, 15 Jan 2011 05:40:29 +0000 (05:40 +0000)]
reduce indentation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123514 91177308-0d34-0410-b5e6-96231b3b80d8

13 years ago80-col.
Eric Christopher [Sat, 15 Jan 2011 00:25:09 +0000 (00:25 +0000)]
80-col.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123505 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoGeneralize LoadAndStorePromoter a bit and switch LICM
Chris Lattner [Sat, 15 Jan 2011 00:12:35 +0000 (00:12 +0000)]
Generalize LoadAndStorePromoter a bit and switch LICM
to use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123501 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFix a comment.
Bob Wilson [Sat, 15 Jan 2011 00:09:18 +0000 (00:09 +0000)]
Fix a comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123497 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFix 80-cols.
Eric Christopher [Fri, 14 Jan 2011 23:50:53 +0000 (23:50 +0000)]
Fix 80-cols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123494 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoUpdate CMake build.
Ted Kremenek [Fri, 14 Jan 2011 22:58:11 +0000 (22:58 +0000)]
Update CMake build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123491 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFix some tablegen issues to allow using zero_reg for InstAlias definitions.
Bob Wilson [Fri, 14 Jan 2011 22:58:09 +0000 (22:58 +0000)]
Fix some tablegen issues to allow using zero_reg for InstAlias definitions.

This is needed to allow an InstAlias for an instruction with an "OptionalDef"
result register (like ARM's cc_out) where you want to set the optional register
to reg0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123490 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFix memory leak found by clang static analyzer.
Ted Kremenek [Fri, 14 Jan 2011 22:34:17 +0000 (22:34 +0000)]
Fix memory leak found by clang static analyzer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123487 91177308-0d34-0410-b5e6-96231b3b80d8

13 years ago'HiReg' is written but never read. Nuke its
Ted Kremenek [Fri, 14 Jan 2011 22:34:13 +0000 (22:34 +0000)]
'HiReg' is written but never read.  Nuke its
declaration and its assignments.

Found by clang static analyzer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123486 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFix a false-positive warning.
Owen Anderson [Fri, 14 Jan 2011 22:31:13 +0000 (22:31 +0000)]
Fix a false-positive warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123480 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoDelete an assignment to ThisBB which isn't needed, and tidy up some
Dan Gohman [Fri, 14 Jan 2011 22:26:16 +0000 (22:26 +0000)]
Delete an assignment to ThisBB which isn't needed, and tidy up some
comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123479 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoEnhance GlobalOpt to be able evaluate initializers that involve stores through
Owen Anderson [Fri, 14 Jan 2011 22:19:20 +0000 (22:19 +0000)]
Enhance GlobalOpt to be able evaluate initializers that involve stores through
bitcasts, at least in simple cases.  This fixes clang's CodeGenCXX/virtual-base-dtor.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123477 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAdd a possibility to switch between CFI directives- and table-based frame description...
Anton Korobeynikov [Fri, 14 Jan 2011 21:58:08 +0000 (21:58 +0000)]
Add a possibility to switch between CFI directives- and table-based frame description emission. Currently all the backends use table-based stuff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123476 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoCleanup
Anton Korobeynikov [Fri, 14 Jan 2011 21:57:58 +0000 (21:57 +0000)]
Cleanup

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123475 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAdd CFI directives-based frame information emission. Not hooked yet.
Anton Korobeynikov [Fri, 14 Jan 2011 21:57:53 +0000 (21:57 +0000)]
Add CFI directives-based frame information emission. Not hooked yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123474 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoSplit stuff as a preparation for CFI directives-based frame information emission
Anton Korobeynikov [Fri, 14 Jan 2011 21:57:45 +0000 (21:57 +0000)]
Split stuff as a preparation for CFI directives-based frame information emission

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123473 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoUse common style for .cfi directives
Anton Korobeynikov [Fri, 14 Jan 2011 21:57:39 +0000 (21:57 +0000)]
Use common style for .cfi directives

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123472 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoSupport for precise scheduling of the instruction selection DAG,
Andrew Trick [Fri, 14 Jan 2011 21:11:41 +0000 (21:11 +0000)]
Support for precise scheduling of the instruction selection DAG,
disabled in this checkin. Sorry for the large diffs due to
refactoring. New functionality is all guarded by EnableSchedCycles.

Scheduling the isel DAG is inherently imprecise, but we give it a best
effort:
- Added MayReduceRegPressure to allow stalled nodes in the queue only
  if there is a regpressure need.
- Added BUHasStall to allow checking for either dependence stalls due to
  latency or resource stalls due to pipeline hazards.
- Added BUCompareLatency to encapsulate and standardize the heuristics
  for minimizing stall cycles (vs. reducing register pressure).
- Modified the bottom-up heuristic (now in BUCompareLatency) to
  prioritize nodes by their depth rather than height. As long as it
  doesn't stall, height is irrelevant. Depth represents the critical
  path to the DAG root.
- Added hybrid_ls_rr_sort::isReady to filter stalled nodes before
  adding them to the available queue.

Related Cleanup: most of the register reduction routines do not need
to be templates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123468 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoswitch SRoA to use LoadAndStorePromoter instead of its own copy of the code.
Chris Lattner [Fri, 14 Jan 2011 19:50:47 +0000 (19:50 +0000)]
switch SRoA to use LoadAndStorePromoter instead of its own copy of the code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123457 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoAdd a new LoadAndStorePromoter class, which implements the general
Chris Lattner [Fri, 14 Jan 2011 19:36:13 +0000 (19:36 +0000)]
Add a new LoadAndStorePromoter class, which implements the general
"promote a bunch of load and stores" logic, allowing the code to
be shared and reused.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123456 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoOperandTraits<>::Layout isn't used for anything. Remove it.
Jay Foad [Fri, 14 Jan 2011 18:41:56 +0000 (18:41 +0000)]
OperandTraits<>::Layout isn't used for anything. Remove it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123452 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoUpdate llvm-gcc's tests.
Rafael Espindola [Fri, 14 Jan 2011 17:01:20 +0000 (17:01 +0000)]
Update llvm-gcc's tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123447 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoReorder macros on config.h.cmake to easily compare it against
Oscar Fuentes [Fri, 14 Jan 2011 16:41:03 +0000 (16:41 +0000)]
Reorder macros on config.h.cmake to easily compare it against
config.h.in.

Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123445 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoDisable debug mode.
Devang Patel [Fri, 14 Jan 2011 15:55:50 +0000 (15:55 +0000)]
Disable debug mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123443 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoTurn X-(X-Y) into Y. According to my auto-simplifier this is the most common
Duncan Sands [Fri, 14 Jan 2011 15:26:10 +0000 (15:26 +0000)]
Turn X-(X-Y) into Y.  According to my auto-simplifier this is the most common
simplification present in fully optimized code (I think instcombine fails to
transform some of these when "X-Y" has more than one use).  Fires here and
there all over the test-suite, for example it eliminates 8 subtractions in
the final IR for 445.gobmk, 2 subs in 447.dealII, 2 in paq8p etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123442 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoFactorize common code out of the InstructionSimplify shift logic. Add in
Duncan Sands [Fri, 14 Jan 2011 14:44:12 +0000 (14:44 +0000)]
Factorize common code out of the InstructionSimplify shift logic.  Add in
threading of shifts over selects and phis while there.  This fires here and
there in the testsuite, to not much effect.  For example when compiling spirit
it fires 5 times, during early-cse, resulting in 6 more cse simplifications,
and 3 more terminators being folded by jump threading, but the final bitcode
doesn't change in any interesting way: other optimizations would have caught
the opportunity anyway, only later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123441 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoRename this test.
Duncan Sands [Fri, 14 Jan 2011 14:16:33 +0000 (14:16 +0000)]
Rename this test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123440 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoswitch the second scalarrepl pass to use SSAUpdater. We run two scalarrepl passes...
Chris Lattner [Fri, 14 Jan 2011 08:21:08 +0000 (08:21 +0000)]
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

13 years agosplit SROA into two passes: one that uses DomFrontiers (-scalarrepl)
Chris Lattner [Fri, 14 Jan 2011 08:13:00 +0000 (08:13 +0000)]
split SROA into two passes: one that uses DomFrontiers (-scalarrepl)
and one that uses SSAUpdater (-scalarrepl-ssa)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123436 91177308-0d34-0410-b5e6-96231b3b80d8

13 years agoRemove casts between Value** and Constant**, which won't work if a
Jay Foad [Fri, 14 Jan 2011 08:07:43 +0000 (08:07 +0000)]
Remove casts between Value** and Constant**, which won't work if a
static_cast from Constant* to Value* has to adjust the "this" pointer.
This is groundwork for PR889.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123435 91177308-0d34-0410-b5e6-96231b3b80d8