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Author SHA1 Message Date
Chris Lattner
722272df41 Add two new classes: WeakVH and AssertingVH. These are both "ValueHandles", 
which are effectively smart pointers to Value*'s.  They are both very light
weight and simple, and react to values being destroyed or being RAUW'd.

WeakVN does a best effort to follow a value around, including through RAUW 
operations and will get nulled out of the value is destroyed.  This is useful
for the eventual "metadata that references a value" work, because it is a
reference to a value that does not show up on its use_* list.

AssertingVH is a pointer that compiles down to a dumb raw pointer when 
assertions are disabled.  When enabled, it emits an assertion if the 
pointed-to value is destroyed while it is still being referenced.  This
is very useful for Maps and other things, and should have caught the recent
bugs in CallGraph and Reassociate, for example.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68149 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 22:11:05 +00:00
Chris Lattner
f385167b85 teach PointerLikeTypeTraits that all pointers to pointers may only be 4-byte aligned. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68147 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 21:28:39 +00:00
Chris Lattner
bdd376ccb2 add some accessors so I can play games with DenseMaps. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68145 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 20:57:23 +00:00
Evan Cheng
de62192843 Throttle back "fold select into operand" transformation. InstCombine should not generate selects of two constants unless they are selects of 0 and 1. 
e.g.
define i32 @t1(i32 %c, i32 %x) nounwind {
       %t1 = icmp eq i32 %c, 0
       %t2 = lshr i32 %x, 18
       %t3 = select i1 %t1, i32 %t2, i32 %x
       ret i32 %t3
}

was turned into

define i32 @t2(i32 %c, i32 %x) nounwind {
       %t1 = icmp eq i32 %c, 0
       %t2 = select i1 %t1, i32 18, i32 0
       %t3 = lshr i32 %x, %t2
       ret i32 %t3
}

For most targets, that means materializing two constants and then a select. e.g. On x86-64

movl    %esi, %eax
shrl    $18, %eax
testl   %edi, %edi
cmovne  %esi, %eax
ret

=>

xorl    %eax, %eax
testl   %edi, %edi
movl    $18, %ecx
cmovne  %eax, %ecx
movl    %esi, %eax
shrl    %cl, %eax
ret

Also, the optimizer and codegen can reason about shl / and / add, etc. by a constant. This optimization will hinder optimizations using ComputeMaskedBits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68142 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 20:42:45 +00:00
Evan Cheng
6fb2168aae Fully general expansion of integer shift of any size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68134 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 19:39:24 +00:00
Evan Cheng
d54f2d571d i128 shift libcalls are not available on x86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68133 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 19:38:51 +00:00
Dan Gohman
968dc7a207 Reapply 68073, with fixes. EH Landing-pad basic blocks are not 
entered via fall-through. Don't miss fallthroughs from blocks
terminated by conditional branches. Also, move
isOnlyReachableByFallthrough out of line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68129 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 18:39:13 +00:00
Mikhail Glushenkov
46801029ea Do not pass '-relocation-model=pic' to llc. 
Does not work well on 32 bit targets. Bug reported by Albert Graef.

This patch also adds new "-Wllc,option" syntax to pass options to llc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68127 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 18:33:54 +00:00
Douglas Gregor
da84b25b13 Stop guessing, start thinking, and make PointerUnion3::is actually be correct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68126 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 18:31:03 +00:00
Dan Gohman
431efa19aa Add an explicit -asm-verbose to these tests, to make it 
possible to run the tests with -asm-verbose defaulting
to false.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68124 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 18:20:47 +00:00
Devang Patel
28c531cdbb Update call graph after inlining invoke. 
Patch by Jay Foad.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68120 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 17:36:12 +00:00
Daniel Dunbar
be46c79501 Add llvm::sys::getHostTriple and remove 
llvm::sys::getOS{Name,Version}.

Right now the implementation just derives from LLVM_HOSTTRIPLE (which
is wrong, but it doesn't look like we have a define for the target
triple). Ideally this routine would actually be able to compute the
triple for targets we care about.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68118 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 17:30:15 +00:00
Dan Gohman
456e281c11 Minor top-level comment fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68113 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 16:51:18 +00:00
Dan Gohman
4b6fce4c05 Tidy up some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68112 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 16:48:35 +00:00
Dan Gohman
e1ca7c4dd5 Add a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68111 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 16:46:45 +00:00
Rafael Espindola
523249f856 remove unused arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68109 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 16:16:57 +00:00
Bill Wendling
df4881c68a Really temporarily revert r68073. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68100 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:42:40 +00:00
Bill Wendling
e67f5e4273 Oy! When reverting r68073, I added in experimental code. Sorry... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68099 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:41:31 +00:00
Owen Anderson
696a1307ba Remove the "fast" cases for spill and restore point determination, as these were subtlely wrong in obscure cases. Patch the testcase 
to account for this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68093 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:27:09 +00:00
Bill Wendling
8fe00540fc Revert r68073. It's causing a failure in the Apple-style builds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68092 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:26:26 +00:00
Chris Lattner
c4ef551192 shrink subclassid, liberating some bits for future (ab)use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68087 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 07:25:22 +00:00
Dan Gohman
07c26ee87e Fix live-out reg logic to not insert over-aggressive AssertZExt 
instructions. This fixes lua.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68083 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 01:38:29 +00:00
Evan Cheng
4d95232469 X86 address mode isel tweak. If the base of the address is also used by a CopyToReg (i.e. it's likely live-out), do not fold the sub-expressions into the addressing mode to avoid computing the address twice. The CopyToReg use will be isel'ed to a LEA, re-use it for address instead. 
This is not yet enabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68082 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 01:13:53 +00:00
Douglas Gregor
a7425d7fde Really, really fix PointerUnion3::is 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68079 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 00:34:31 +00:00
Dan Gohman
80c93e7442 Except in asm-verbose mode, avoid printing labels for blocks that are 
only reachable via fall-through edges. This dramatically reduces the
number of labels printed, and thus also the number of labels the
assembler must parse and remember.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68073 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 22:55:17 +00:00
Devang Patel
b23c232fc8 Loop Index Split can eliminate a loop if it can determin if loop body is executed only once. There was a bug in determining IV based value of the iteration for which the loop body is executed. Fix it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68071 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 22:24:10 +00:00
Douglas Gregor
2048cdb08e Make PointerUnion3::get work properly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68067 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 21:44:13 +00:00
Evan Cheng
73f24c9f0d When optimzing a mul by immediate into two, the resulting mul's should get a x86 specific node to avoid dag combiner from hacking on them further. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68066 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 21:36:47 +00:00
Evan Cheng
e6f350d755 Turn a 2-address instruction into a 3-address one when it's profitable even if the two-address operand is killed. 
e.g.
%reg1024<def> = MOV r1
%reg1025<def> = ADD %reg1024, %reg1026
r0            = MOV %reg1025

If it's not possible / profitable to commute ADD, then turning ADD into a LEA saves a copy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68065 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 21:34:07 +00:00
Chris Lattner
f54229192c update comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68060 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:44:04 +00:00
Bill Wendling
fd302b7056 Balance out quote in debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68059 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:32:22 +00:00
Bill Wendling
430d423e4b Fix grammar-o in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68057 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:30:02 +00:00
Chris Lattner
e8bc475668 add a PointerUnion3 class and generalize PointerUnion to work with 
anything pointer-like, which may or may not actually be a pointer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68056 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:29:27 +00:00
Chris Lattner
c6a4b6b78b fix the PointerLikeTypeTraits specialization for PointerIntPair to 
allow the traits to be specified as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68055 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:28:50 +00:00
Dan Gohman
6d1b89e74f Constify arguments in isSuccessor and isLayoutSuccessor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68054 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:06:29 +00:00
Dan Gohman
d480ac6f97 Update the polygen grammer to reflect that zext and sext are no longer 
valid argument attributes (zeroext and signext are).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68053 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 19:59:02 +00:00
John Mosby
3228abe8f9 docs/TestingGuide.html: correction to prev. text (objdir!=srcdir required for running test-suite), removed refs to llvm-test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68051 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 18:56:53 +00:00
Bob Wilson
d83712ad67 Fix comment to match function name. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68050 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 18:49:37 +00:00
Devang Patel
6d9a2df4ec getEntryFor() may invalidate DenseMap iterator. 
Walking an invalidated iterator is not a good idea.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68047 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 18:34:47 +00:00
Mike Stump
854b9d7623 Add ccc back for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68038 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 17:43:04 +00:00
Anton Korobeynikov
ca6234944c Clearify local/global relocations wording 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68037 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 17:38:00 +00:00
Anton Korobeynikov
29519b1de0 Fix thinko: put stuff with both global and local relocations into data.rel{.ro}, not .local 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68036 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 17:37:43 +00:00
Anton Korobeynikov
30ffe8150f Tweak test for recent relro stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68035 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:28:40 +00:00
Anton Korobeynikov
48738b9244 Fix infinite looping 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68034 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:28:21 +00:00
Anton Korobeynikov
fd653071b5 Properly propagate Kind. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68033 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:28:00 +00:00
Anton Korobeynikov
fca82deecb Do not propagate ELF-specific stuff (data.rel) into other targets. This simplifies code and also ensures correctness. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68032 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:27:43 +00:00
Anton Korobeynikov
71a7c6cde0 Add data.rel stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68031 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:27:03 +00:00
Chris Lattner
217b919cf9 fix some validation problems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68026 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 06:34:59 +00:00
Evan Cheng
878071e6d0 Forgot this test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68025 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 06:17:34 +00:00
John Mosby
24446d671a Clarify section on setting up and running test-suite 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68023 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 04:37:51 +00:00