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Author SHA1 Message Date
Eli Friedman
cd38485b8a Duncan pointed out that if the alignment isn't explicitly specified, it defaults to the ABI alignment. Given that, make this code a bit more aggressive in such cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151584 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-27 23:16:46 +00:00
Eli Friedman
1680a24e53 Teach BasicAA about the LLVM IR rules that allow reading past the end of an object given sufficient alignment. Fixes PR12098. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151553 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-27 20:46:07 +00:00
Rafael Espindola
23b6ec906a Fix this assert. IP can point to an instruction with strange dominance 
properties (invoke). Just assert that the instruction we return dominates
the insertion point.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151511 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-27 02:13:03 +00:00
Rafael Espindola
5465c9422f Don't call dominates on unreachable instructions. Should fix the dragonegg 
build. Testcase is still reducing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151474 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-26 05:30:08 +00:00
Rafael Espindola
32c185eb27 And update the comment... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151472 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-26 02:36:56 +00:00
Rafael Espindola
5b04cfb785 Enable the assert that got all this dominator work started. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151471 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-26 02:29:18 +00:00
Rafael Espindola
c9ae8cc24c Change the implementation of dominates(inst, inst) to one based on what the 
verifier does. This correctly handles invoke.
Thanks to Duncan, Andrew and Chris for the comments.
Thanks to Joerg for the early testing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151469 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-26 02:19:19 +00:00
Nick Lewycky
f7087ea508 Reinstate the optimization from r151449 with a fix to not turn 'gep %x' into 
'gep null' when the icmp predicate is unsigned (or is signed without inbounds).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151467 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-26 02:09:49 +00:00
Rafael Espindola
8c727f9200 Don't call dominates on unreachable instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151466 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-26 01:50:14 +00:00
Nick Lewycky
6fd3428afa Roll these back to r151448 until I figure out how they're breaking 
MultiSource/Applications/lua.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151463 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-25 23:01:19 +00:00
Nick Lewycky
28e215ba63 An argument and a local identified object (eg. a noalias call) could turn out 
equal if both are null. In the test, scope type %t and global @y by adding a
'gep' prefix to them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151452 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-25 20:19:07 +00:00
Nick Lewycky
6bfb9d6a13 Fix five-letter typo in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151450 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-25 19:12:58 +00:00
Nick Lewycky
1e4e1c768b Teach instsimplify to be more aggressive when analyzing comparisons of pointers 
by using llvm::isIdentifiedObject. Also teach it to handle GEPs that have
the same base pointer and constant operands. Fixes PR11238!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151449 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-25 19:07:42 +00:00
Nick Lewycky
55f4ab84e5 Move isKnownNonNull from private implementation detail of BasicAA to a public 
function that others can use, next to llvm::isIdentifiedObject.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151446 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-25 10:56:28 +00:00
Chris Lattner
009e2650d6 fix PR12075, a regression in a recent transform I added. In unreachable code, gep chains can be infinite. Just like "stripPointerCasts", use a set to keep track of visited instructions so we don't recurse infinitely. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151383 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-24 19:01:58 +00:00
Rafael Espindola
7481d07a07 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151238 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-23 05:38:51 +00:00
Chad Rosier
90f20044ad Remove extra semi-colons. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151169 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-22 17:25:00 +00:00
Rafael Espindola
b84d540bc9 Improve comment. Thanks for Andrew for the suggestion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151127 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-22 03:44:46 +00:00
Rafael Espindola
919a503458 Semantically revert 151015. Add a comment on why we should be able to assert 
the dominance once the dominates method is fixed and why we can use the builder's
insertion point.
Fixes pr12048.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151125 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-22 03:21:39 +00:00
Rafael Espindola
e16da6c020 s/the the/the/ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151079 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-21 19:27:16 +00:00
Rafael Espindola
705b48d960 Use more idiomatic assert. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151026 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-21 03:51:14 +00:00
Rafael Espindola
161fb5d936 Avoid warning on non assert builds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151025 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-21 03:48:30 +00:00
Rafael Espindola
4b04578d65 It turns out that with the current scev organization ReuseOrCreateCast cannot 
know where users will be added. Because of this, it cannot use
Builder.GetInsertPoint at all.

This patch
* removes the FIXME about adding the assert.
* adds a comment explaining hy we don't have one.
* removes a broken logic that only works for some callers and is not needed
  since r150884.
* adds an assert to caller that would have caught the bug fixed by r150884.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151015 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-21 01:19:51 +00:00
Eric Christopher
1c7f744bbb Make this a bit prettier and more obvious when a derived type isn't 
derived from anything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150975 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-20 18:04:39 +00:00
Eric Christopher
dc1eeb89f2 If a derived type is also a composite type, print that information 
too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150974 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-20 18:04:35 +00:00
Eric Christopher
9f90e8760f Add support for runtime languages on our forward declarations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150973 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-20 18:04:14 +00:00
Chris Lattner
b053fc1c92 fold comparisons of gep'd alloca points with null to false, 
implementing PR12013.  We now compile the testcase to:

__Z4testv:                              ## @_Z4testv
## BB#0:                                ## %_ZN4llvm15SmallVectorImplIiE9push_backERKi.exit
	pushq	%rbx
	subq	$64, %rsp
	leaq	32(%rsp), %rbx
	movq	%rbx, (%rsp)
	leaq	64(%rsp), %rax
	movq	%rax, 16(%rsp)
	movl	$1, 32(%rsp)
	leaq	36(%rsp), %rax
	movq	%rax, 8(%rsp)
	leaq	(%rsp), %rdi
	callq	__Z1gRN4llvm11SmallVectorIiLj8EEE
	movq	(%rsp), %rdi
	cmpq	%rbx, %rdi
	je	LBB0_2
## BB#1:
	callq	_free
LBB0_2:                                 ## %_ZN4llvm11SmallVectorIiLj8EED1Ev.exit
	addq	$64, %rsp
	popq	%rbx
	ret

instead of:

__Z4testv:                              ## @_Z4testv
## BB#0:
	pushq	%rbx
	subq	$64, %rsp
	xorl	%eax, %eax
	leaq	(%rsp), %rbx
	addq	$32, %rbx
	movq	%rbx, (%rsp)
	movq	%rbx, 8(%rsp)
	leaq	64(%rsp), %rcx
	movq	%rcx, 16(%rsp)
	je	LBB0_2
## BB#1:
	movl	$1, 32(%rsp)
	movq	%rbx, %rax
LBB0_2:                                 ## %_ZN4llvm15SmallVectorImplIiE9push_backERKi.exit
	addq	$4, %rax
	movq	%rax, 8(%rsp)
	leaq	(%rsp), %rdi
	callq	__Z1gRN4llvm11SmallVectorIiLj8EEE
	movq	(%rsp), %rdi
	cmpq	%rbx, %rdi
	je	LBB0_4
## BB#3:
	callq	_free
LBB0_4:                                 ## %_ZN4llvm11SmallVectorIiLj8EED1Ev.exit
	addq	$64, %rsp
	popq	%rbx
	ret

This doesn't shrink clang noticably though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150944 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-20 00:42:49 +00:00
Rafael Espindola
f3b32b3572 Temporarily disable this assert. Looks like it found a similar issue when 
building bullet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150885 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-18 17:51:43 +00:00
Rafael Espindola
ef4c80e07b Don't skip debug instructions when looking for the insertion point of 
the cast. If we do, we can end up with

   inst1
   ---------------  < Insertion point
   dbg inst
   new inst

instead of the desired

   inst1
   new inst
   ---------------  < Insertion point
   dbg inst

Another option would be for InsertNoopCastOfTo (or its callers) to move the
insertion point and we would end up with

   inst1
   dbg inst
   new inst
   ---------------  < Insertion point

but that complicates the callers. This fixes PR12018 (and firefox's build).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150884 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-18 17:22:58 +00:00
Eli Friedman
2c3acb0e27 Fix a rather nasty regression from r150690: LHS != RHS does not imply LHS->stripPointerCasts() != RHS->stripPointerCasts(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150863 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-18 03:29:25 +00:00
Dan Gohman
ebad58dc58 Remove a comment about an alternative approach that wouldn't 
actually work, at least as described. LLVM Metadata is not
intended to suppress LLVM IR rules, as it can be stripped at
any time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150821 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-17 18:33:38 +00:00
Eric Christopher
ed993de642 Typo in variable name. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150796 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-17 07:08:46 +00:00
Benjamin Kramer
ea79b8e03c Revert "InstSimplify: Strip pointer casts early." 
Turns out this isn't safe, because the code below depends on LHS and RHS having
the same type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150695 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-16 15:19:59 +00:00
Benjamin Kramer
475ebf5a74 InstSimplify: Strip pointer casts early. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150694 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-16 15:03:04 +00:00
Benjamin Kramer
fd8779a94b InstSimplify: Ignore pointer casts when constant folding compares between pointers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150690 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-16 13:49:39 +00:00
Hal Finkel
ce0dd7314b Have AliasSet::aliasesUnknownInst use pointer TBAA info when available 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150249 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-10 15:52:39 +00:00
Duncan Sands
aa97bb54f0 Fix PR11948: the result type of an icmp may be a vector of boolean - 
don't assume it is a boolean.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150247 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-10 14:31:24 +00:00
Eric Christopher
4fe3457292 Add support for a temporary forward decl type. We want this so we 
can rauw forward declarations if we decide to emit the full type.

Part of rdar://10809898

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150024 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-08 00:22:26 +00:00
Devang Patel
9f99721a18 Remove tabs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150022 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-08 00:17:07 +00:00
Craig Topper
858143816d Convert assert(0) to llvm_unreachable 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149967 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-07 05:05:23 +00:00
Kostya Serebryany
0ca032b03d The patch resolves the conflict between AddressSanitizer and load widening (GVN). 
The problem initially reported by Mozilla folks (http://code.google.com/p/address-sanitizer/issues/detail?id=20),
but it also prevents us from enabling LLVM bootstrap with AddressSanitizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149925 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-06 22:48:56 +00:00
Chris Lattner
7302d80490 Remove some dead code and tidy things up now that vectors use ConstantDataVector 
instead of always using ConstantVector.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149912 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-06 21:56:39 +00:00
Bill Wendling
8833ef03b9 [unwind removal] Remove all of the code for the dead 'unwind' instruction. There 
were no 'unwind' instructions being generated before this, so this is in effect
a no-op.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149906 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-06 21:44:22 +00:00
Bill Wendling
aa5abe88d6 [unwind removal] We no longer have 'unwind' instructions being generated, so 
remove the code that handles them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149901 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-06 21:16:41 +00:00
Devang Patel
6588abf377 DebugInfo: Provide a new hook to encode relationship between a property and an ivar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149874 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-06 17:49:43 +00:00
Duncan Sands
5b8a1db7ea Persuade GCC that there is nothing worth warning about here (there isn't). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149834 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-05 14:20:11 +00:00
Chris Lattner
18c7f80b3e reapply the patches reverted in r149470 that reenable ConstantDataArray, 
but with a critical fix to the SelectionDAG code that optimizes copies
from strings into immediate stores: the previous code was stopping reading
string data at the first nul.  Address this by adding a new argument to
llvm::getConstantStringInfo, preserving the behavior before the patch.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149800 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-05 02:29:43 +00:00
Qirun Zhang
fd4b8e2bac remove the blank line from previous ci. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149758 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-04 03:18:47 +00:00
Qirun Zhang
940fbd6d66 test commit. 
add a blank line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149757 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-04 03:15:26 +00:00
Devang Patel
1ea02d467a Introduce DIObjCProperty. This will be used to encode objective-c property. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149732 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-02-04 00:59:25 +00:00