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Author SHA1 Message Date
Andrew Trick
d974ea22a5 Unit test for r140919, loop unroll heuristics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141049 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-04 00:07:02 +00:00
Rafael Espindola
25456ef74c Add the returns_twice attribute to LLVM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141001 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-03 14:45:37 +00:00
Nick Lewycky
11357d4f40 Add a new icmp+select optz'n. Also shows off the load(cst) folding added in 
r140966.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140969 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-02 10:37:37 +00:00
Jim Grosbach
cbf676b3ba float comparison to double 'zero' constant can just be a float 'zero.' 
InstCombine was incorrectly considering the conversion of the constant
zero to be unsafe.

We want to transform:
define float @bar(float %x) nounwind readnone optsize ssp {
  %conv = fpext float %x to double
  %cmp = fcmp olt double %conv, 0.000000e+00
  %conv1 = zext i1 %cmp to i32
  %conv2 = sitofp i32 %conv1 to float
  ret float %conv2
}

Into:
define float @bar(float %x) nounwind readnone optsize ssp {
  %cmp = fcmp olt float %x, 0.000000e+00   ; <---- This
  %conv1 = zext i1 %cmp to i32
  %conv2 = sitofp i32 %conv1 to float
  ret float %conv2
}


rdar://10215914


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140869 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-30 18:45:50 +00:00
Duncan Sands
5bc93e782e Add forgotten tests that the cleanup flag is cleared if there 
is a catch-all landingpad clause.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140858 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-30 17:00:34 +00:00
Duncan Sands
0ad7b6e773 Inlining often produces landingpad instructions with repeated 
catch or repeated filter clauses.  Teach instcombine a bunch
of tricks for simplifying landingpad clauses.  Currently the
code only recognizes the GNU C++ and Ada personality functions,
but that doesn't stop it doing a bunch of "generic" transforms
which are hopefully fine for any real-world personality function.
If these "generic" transforms turn out not to be generic, they
can always be conditioned on the personality function.  Probably
someone should add the ObjC++ personality function.  I didn't as
I don't know anything about it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140852 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-30 13:12:16 +00:00
Dan Gohman
27e0666725 When eliminating unnecessary retain+autorelease on return values, 
handle the case where the retain is in a different basic block.
rdar://10210274.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140815 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-29 22:27:34 +00:00
Dan Gohman
597fece886 Don't eliminate objc_retainBlock calls on stack objects if the 
objc_retainBlock call is potentially responsible for copying
the block to the heap to extend its lifetime. rdar://10209613.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140814 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-29 22:25:23 +00:00
Andrew Trick
52164eaddc Test case for r140670: indvars should hoist sext. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140671 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-28 02:13:32 +00:00
Benjamin Kramer
a9390a4d5f Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit. 
If someone prefers %tmp42 to %42, run instnamer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140634 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-27 20:39:19 +00:00
Bill Wendling
d5520987d1 Split the landing pad basic block with the correct function. Also merge the 
split landingpad instructions into a PHI node.
PR11016


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140592 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-27 00:59:31 +00:00
Eli Friedman
ad2d46d0a5 Convert more tests over to the new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140559 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 20:27:49 +00:00
Eli Friedman
236b71fc75 Upgrade a couple more tests to the new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140558 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 20:15:56 +00:00
Eli Friedman
d102a03b36 PR10987: add a missed safety check to isSafePHIToSpeculate in scalarrepl. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140327 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-22 18:56:30 +00:00
Eli Friedman
79782fc864 Make sure IPSCCP never marks a tracked call as overdefined in SCCPSolver::ResolvedUndefsIn. If we do, we can end up in a situation where a function is resolved to return a constant, but the caller is marked overdefined, which confuses the code later. 
<rdar://problem/9956541> (again).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140210 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-20 23:28:51 +00:00
Bill Wendling
e3039de722 Update this test to the new EH model. 
Though I think it may be obsolete with the loop extract changes. And I couldn't
get the old version of LLVM to compile so that I could reduce this testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140197 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-20 22:29:43 +00:00
Bill Wendling
9914f4a1f2 Update to new EH model. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140177 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-20 20:21:16 +00:00
Bill Wendling
9ead2c0609 Update to the new EH syntax. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140103 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 23:50:34 +00:00
Bill Wendling
0b9a90932d Dramatically reduce this testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140101 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 23:47:06 +00:00
Bill Wendling
a846585050 Revert r140083 and r140084 until buildbots can be fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140094 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 23:30:41 +00:00
Bill Wendling
39b4166d85 Update test to remove the 'unwind' instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140084 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 23:01:11 +00:00
Bill Wendling
463158fdb8 Replace uses of unwind with unreachable for the same effect. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140077 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 22:16:15 +00:00
Bill Wendling
803c9d33be Replace more uses of 'unwind' in the tests with calls to landingpad and 
resume. Note that some of these tests were basically dead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140076 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 22:11:35 +00:00
Eli Friedman
c6b8ba8673 Fix an infinite loop where a transform in InstCombiner::visitAnd claims a construct is changed when it is not. (See included testcase.) 
Patch by Xiaoyi Guo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140072 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 21:58:15 +00:00
Bill Wendling
f2d15db05b This testcase is dead. It doesn't inline even if I add the 'alwaysinline' 
attribute to the @foo function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140067 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 21:14:33 +00:00
Andrew Trick
24f48ece52 [indvars] Fix PR10946: SCEV cannot handle Vector IVs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140026 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 17:54:39 +00:00
Andrew Trick
b0598b14aa Reapply r139759. Disable IV rewriting by default. See PR10916. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139842 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-15 20:58:37 +00:00
Eli Friedman
c82751dd67 Make demanded-elt simplification for shufflevector slightly stronger. Spotted by inspection. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139768 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-15 01:14:29 +00:00
Dan Gohman
211048286b objc_retainBlock is not NoModRef because it can update forwarding pointers 
in memory relevant to the optimizer. rdar://10050579.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139708 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-14 18:13:00 +00:00
Andrew Trick
effb647154 [indvars] Revert r139579 until 401.bzip -arch i386 miscompilation is fixed. PR10920. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139583 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 05:23:49 +00:00
Andrew Trick
dd9d758a31 Disable IV rewriting by default. See PR10916. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139579 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 03:23:21 +00:00
Andrew Trick
603fff3968 Generalize test case to handle multiple indvars modes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139578 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 03:17:25 +00:00
Andrew Trick
94f2c23d24 [indvars] Fix bugs in floating point IV range checks noticed by inspection. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139574 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 01:59:32 +00:00
Andrew Trick
857ad229be Conditionalize indvars test that relies on SCEV expansion of geps, 
which is only relevant with canonical IVs


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139556 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 23:13:57 +00:00
Andrew Trick
27cea8e34b indvars test only relevant for -enable-iv-rewrite. 
Otherwise this case is now covered by no-iv-rewrite.ll.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139552 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 22:59:00 +00:00
Andrew Trick
26e5285f9f Conditionalize indvars tests that rely on SCEV expansion of geps, 
which is relevant with canonical IVs. Anything else being checked by
these tests is already covered by early CSE.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139535 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 20:26:34 +00:00
Andrew Trick
29da5e6855 Removing indvars tests that directly test canonical IVs and nothing else. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139518 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 18:33:08 +00:00
Andrew Trick
f21bdf4f42 Rename -disable-iv-rewrite to -enable-iv-rewrite=false in preparation for default change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139517 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 18:28:44 +00:00
Andrew Trick
8f7ca5d98e Test case for r139453, WidenIV::GetExtendedOperandRecurrence. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139504 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 17:20:57 +00:00
Duncan Sands
73c8415d90 Mark the eh.typeid.for intrinsic as being 'const', which it is inside 
any given function.  As pointed out by John McCall, this is needed to
have redundant eh.typeid.for tests be eliminated in the presence of
cleanups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139360 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-09 07:50:37 +00:00
Duncan Sands
758ba1f4ed When inlining exception handling code into another function, ensure that 
duplicate tests are eliminated (for example if the two functions both have
a catch clause catching the same type, ensure the redundant one is removed).
Note that it would probably be safe to say that eh.typeid.for is 'const',
but since two calls to it with the same argument can give different results
(but only if the calls are in different functions), it seems more correct to
mark it only 'pure'; this doesn't get in the way of the optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139236 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-07 16:44:14 +00:00
Duncan Sands
e8e721f0c2 Forgot to add this trampoline testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139229 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-07 09:21:38 +00:00
Owen Anderson
81856f7313 Try again at r138809 (make DSE more aggressive in removing dead stores at the end of a function), now with less deleting stores before memcpy's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139150 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-06 18:14:09 +00:00
Duncan Sands
4a544a79bd Split the init.trampoline intrinsic, which currently combines GCC's 
init.trampoline and adjust.trampoline intrinsics, into two intrinsics
like in GCC.  While having one combined intrinsic is tempting, it is
not natural because typically the trampoline initialization needs to
be done in one function, and the result of adjust trampoline is needed
in a different (nested) function.  To get around this llvm-gcc hacks the
nested function lowering code to insert an additional parent variable
holding the adjust.trampoline result that can be accessed from the child
function.  Dragonegg doesn't have the luxury of tweaking GCC code, so it
stored the result of adjust.trampoline in the memory GCC set aside for
the trampoline itself (this is always available in the child function),
and set up some new memory (using an alloca) to hold the trampoline.
Unfortunately this breaks Go which allocates trampoline memory on the
heap and wants to use it even after the parent has exited (!).  Rather
than doing even more hacks to get Go working, it seemed best to just use
two intrinsics like in GCC.  Patch mostly by Sanjoy Das.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139140 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-06 13:37:06 +00:00
Benjamin Kramer
ae707bd559 InstSimplify: Don't try to replace an extractvalue/insertvalue pair with the original value if types don't match. 
Fixes clang selfhost.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139120 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-05 18:16:19 +00:00
Duncan Sands
ad99ef8bf5 Delete trivial landing pads that just continue unwinding the caught 
exception.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139117 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-05 12:57:57 +00:00
Duncan Sands
dabc280672 Add some simple insertvalue simplifications, for the purpose of cleaning 
up do-nothing exception handling code produced by dragonegg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139113 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-05 06:52:48 +00:00
Bill Wendling
47e208bbea Try to eliminate the use of the 'unwind' instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139046 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 22:41:11 +00:00
Andrew Trick
6984625d16 Test case update for unroll-scev. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139037 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 21:21:03 +00:00
Jakub Staszak
9469d5cf48 Extra CHECK-NOT to make sure that GVN transform works properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139012 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 17:40:39 +00:00
Andrew Trick
dc07321164 -unroll-scev flag removal 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139010 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 17:36:14 +00:00
Jakub Staszak
4c6b8bee2a ConstantVector returns arbitrary value for the wrong index. 
This fixes PR10813.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139006 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 15:43:43 +00:00
Jakub Staszak
8cec759339 Compare type size instead of type _store_ size to make sure that BitCastInst 
will be valid. This fixes PR10820.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139005 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 14:57:37 +00:00
Bill Wendling
b0b9a67f98 Update to new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138989 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 01:25:11 +00:00
Eli Friedman
770e16fe17 Fix test; sorry for any inconvenience. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138966 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:25:42 +00:00
Eli Friedman
86b5db8c01 Fix an issue with the IR sink pass found by inspection. (I'm not sure anyone is actually using this, but might as well fix it since I found the issue.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138965 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:21:24 +00:00
Eli Friedman
89e0f4b5b0 Add missing newline. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138964 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:20:11 +00:00
Bill Wendling
00c30d58a5 Update to new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138933 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 01:28:25 +00:00
Bill Wendling
65088e7d96 Update to new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138928 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 01:08:21 +00:00
Bill Wendling
15db556b56 Update to new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138927 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 01:02:41 +00:00
Bill Wendling
aeaa9a8b25 Update some tests to the new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138925 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 00:58:03 +00:00
Bill Wendling
b5d92d83b4 Reenable test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138916 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 23:08:05 +00:00
Bill Wendling
3b5e99d79e Revert accidental commit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138915 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 23:07:46 +00:00
Eli Friedman
1b73866505 Disable this test until Bill fixes it properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138914 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 23:03:30 +00:00
Bill Wendling
08c2862540 Update to new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138908 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 21:50:07 +00:00
Bill Wendling
935903191f Update more tests to the new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138903 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 21:39:05 +00:00
Eli Friedman
24adac8b79 Add tests for the transformations SCCP can do on atomic loads and stores (which are safe without any modifications). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138902 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 21:37:06 +00:00
Bill Wendling
ab98f9d155 Update more tests to the new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138894 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 21:04:11 +00:00
Bill Wendling
b072dd9ba4 Update the tests to the new EH scheme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138891 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 20:55:40 +00:00
Rafael Espindola
f940a1a869 Remove the old tail duplication pass. It is not used and is unable to update 
ssa, so it has to be run really early in the pipeline. Any replacement
should probably use the SSAUpdater.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138841 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 23:03:45 +00:00
Owen Anderson
1333abc785 Remove empty file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138830 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 21:17:20 +00:00
Owen Anderson
54c4735db3 Speculatively revert r138809 in an attempt to fix DragonEgg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138829 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 21:11:06 +00:00
Owen Anderson
6e4be237b0 When walking backwards to eliminate final stores to allocas at the end of a function, encountering an unrelated store should not cause us to give up like encountering a load does. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138809 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 18:51:55 +00:00
Bill Wendling
6af6824eb4 Update tests to new EH model. Add landingpad instructions to landing pads. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138759 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-29 20:39:23 +00:00
Nadav Rotem
89879ec76b Fixes following the CR by Chris and Duncan: 
Optimize chained bitcasts of the form A->B->A.
Undo r138722 and change isEliminableCastPair to allow this case.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138756 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-29 19:58:36 +00:00
Nadav Rotem
be6ceb6ebc Bitcasts are transitive. Bitcast-Bitcast-X becomes Bitcast-X. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138722 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-28 11:51:08 +00:00
Bill Wendling
df77a71790 Auto upgrade the old EH scheme to use the new one. This is on a trial basis. If 
things to disasterously over night, this can be reverted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138702 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-27 06:11:03 +00:00
Bill Wendling
2b18881185 Don't sink landingpad instructions during ind-var simplification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138651 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-26 20:40:15 +00:00
Andrew Trick
6ca06cd8a8 Use %% for literals in RUN lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138647 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-26 20:09:48 +00:00
Benjamin Kramer
98d6d2372f SimplifyCFG: If we have a PHI node that can evaluate to NULL and do a load or store to the address returned by the PHI node then we can consider this incoming value as dead and remove the edge pointing there, unless there are instructions that can affect control flow executed in between. 
In theory this could be extended to other instructions, eg. division by zero, but it's likely that it will "miscompile" some code because people depend on div by zero not trapping. NULL pointer dereference usually leads to a crash so we should be on the safe side.

This shrinks the size of a Release clang by 16k on x86_64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138618 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-26 01:22:29 +00:00
Nadav Rotem
4c7c0f2353 Implement Constant::isAllOnesValue(). Fix ConstantFolding to use the new api. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138469 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-24 20:18:38 +00:00
Eric Christopher
acc8f2d938 Revert "Address Duncan's CR request:" 
This reverts commit 20a05be15e. (svn rev 138340)

Conflicts:

	test/Transforms/InstCombine/bitcast.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138366 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-23 20:11:10 +00:00
Nadav Rotem
46634f5f92 Fix a typo in the test from the previous commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138342 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-23 17:56:54 +00:00
Nadav Rotem
20a05be15e Address Duncan's CR request: 
1. Cleanup the tests in ConstantFolding.cpp
2. Implement isAllOnes for Constant, ConstantFP, ConstantVector





git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138340 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-23 17:48:43 +00:00
Dan Gohman
1b31ea8f93 Constant pointers to objects don't need reference counting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138242 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-22 17:29:11 +00:00
Dan Gohman
986b865c03 Make a few tests slightly more strict. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138241 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-22 17:27:02 +00:00
Nadav Rotem
1c9fe0361b Add constant folding support for bitcasts of splat vectors to integers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138206 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-20 14:02:29 +00:00
Eric Christopher
a510a1c931 Add file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138083 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-19 21:21:20 +00:00
Dan Gohman
e6d5e88c12 Track a retain+release nesting level independently of the 
known-incremented level, because the two concepts can be used
to prove the saftey of a retain+release removal in different
ways.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138016 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-19 00:26:36 +00:00
Eli Friedman
56efe24431 Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137888 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-17 22:22:24 +00:00
Eli Friedman
447f95202a Silly mistake from r137777; restore significant isStructTy() checks. While here, be a bit more defensive 
with unknown instructions.

Fixes PR10687.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137836 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-17 18:10:43 +00:00
Eli Friedman
bfd5040ddc An additional atomic test; related to r137662. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137786 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-16 23:29:17 +00:00
Eli Friedman
054ddf799b A bunch of misc fixes to SCCPSolver::ResolvedUndefsIn, including a fix to stop 
making random bad assumptions about instructions which are not explicitly listed.  

Includes fix for rdar://9956541, a version of "undef ^ undef should return
0 because it's easier than arguing with users".



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137777 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-16 22:06:31 +00:00
Eli Friedman
1fc291f0d3 Minor bug in SCCP found by inspection. (I don't think it's possible to hit this with a normal pass pipeline, but fixing for completeness.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137755 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-16 21:12:35 +00:00
Eli Friedman
34fd67c7bc Fix test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137703 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-16 01:42:56 +00:00
Eli Friedman
2199dfb0e6 Revert a bit of r137667; the logic in question can safely handle atomic load/store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137702 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-16 01:28:22 +00:00
Eric Christopher
89a01a0cbd Migrate this test from llvm/test/FrontendC++/ptr-to-method-devirt.cpp and 
FileCheckize. It is more properly an optimizer test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137700 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-16 01:17:17 +00:00
Eli Friedman
8176388d65 Update SimplifyCFG for atomic operations. 
This commit includes a mention of the landingpad instruction, but it's not
changing the behavior around it.  I think the current behavior is correct,
though.  Bill, can you double-check that?



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137691 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-15 23:59:28 +00:00
Eli Friedman
fd06b3cfa1 Add comments and test for atomic load/store and mem2reg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137690 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-15 23:55:52 +00:00
Eli Friedman
cc4a0435b7 Update instcombine for atomic load/store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137664 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-15 22:09:40 +00:00
Eli Friedman
97671565ff Atomic load/store support in LICM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137648 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-15 20:52:09 +00:00
Eric Christopher
f000957aad Add an ipsccp test. Migrated from test/FrontendC++. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137646 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-15 20:50:36 +00:00
Nick Lewycky
28b84ff4ce This transform is not safe. Thanks to Eli for pointing that out! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137575 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-14 04:51:49 +00:00
Nick Lewycky
7f0170c197 Don't attempt to add 'nsw' when intermediate instructions had no such guarantee. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137572 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-14 03:41:33 +00:00
Nick Lewycky
daf27ea899 Teach instcombine to preserve the nsw bit by doing an after-the-fact analysis 
when combining add and sub instructions. Patch by Pranav Bhandarkar!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137570 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-14 01:45:19 +00:00
Eli Friedman
f03bb260c9 Move "atomic" and "volatile" designations on instructions after the opcode 
of the instruction.

Note that this change affects the existing non-atomic load and store
instructions; the parser now accepts both forms, and the change is noted
in the release notes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137527 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-12 22:50:01 +00:00
Dan Gohman
126a54f1fa Don't convert objc_autoreleaseReturnValue to objc_autorelease if the result 
is returned through a bitcast.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137402 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-12 00:36:31 +00:00
Dan Gohman
a7f7db2ebd Don't let arbitrary calls disrupt nested retain+release pairs if 
the retains and releases all use the same SSA pointer value.

Also, don't let CFG hazards disrupt nested retain+release pair
optimizations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137399 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-12 00:26:31 +00:00
Andrew Trick
30039de2e9 A slew of unit tests for the recent LoopInfo::updateUnloop feature 
checked in at r137276 and r137341.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137385 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-11 23:38:09 +00:00
Andrew Trick
b1831c6640 Allow loop unrolling to get known trip counts from ScalarEvolution. 
SCEV unrolling can unroll loops with arbitrary induction variables. It
is a prerequisite for -disable-iv-rewrite performance. It is also
easily handles loops of arbitrary structure including multiple exits
and is generally more robust.

This is under a temporary option to avoid affecting default
behavior for the next couple of weeks. It is needed so that I can
checkin unit tests for updateUnloop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137384 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-11 23:36:16 +00:00
Andrew Trick
39f40299a6 Invoke SimplifyIndVar when we partially unroll a loop. Fixes PR10534. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137203 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-10 04:29:49 +00:00
Andrew Trick
b1eede1281 Fix the LoopUnroller to handle nontrivial loops and partial unrolling. 
These are not individual bug fixes. I had to rewrite a good chunk of
the unroller to make it sane. I think it was getting lucky on trivial
completely unrolled loops with no early exits. I included some fairly
simple unit tests for partial unrolling. I didn't do much stress
testing, so it may not be perfect, but should be usable now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137190 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-10 00:28:10 +00:00
Dan Gohman
8db7353246 Tidy up these testcases to look more like real code does. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137085 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-09 00:33:11 +00:00
Andrew Trick
06988bcf6a Made SCEV's UDiv expressions more canonical. When dividing a 
recurrence, the initial values low bits can sometimes be ignored.

To take advantage of this, added FoldIVUser to IndVarSimplify to fold
an IV operand into a udiv/lshr if the operator doesn't affect the
result.

-indvars -disable-iv-rewrite now transforms

i = phi i4
i1 = i0 + 1
idx = i1 >> (2 or more)
i4 = i + 4

into

i = phi i4
idx = i0 >> ...
i4 = i + 4


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137013 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-06 07:00:37 +00:00
Bill Wendling
2626dba9c5 Remove the LowerSetJmp pass. It wasn't used effectively by any of the targets. 
This is some of my original LLVM code. *wipes tear*


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136821 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-03 22:18:20 +00:00
Andrew Trick
1009c3299b SCEV: Use AssertingVH to catch dangling BasicBlock* when passes forget 
to notify SCEV of a change. Add forgetLoop in a couple of those places.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136797 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-03 18:32:11 +00:00
Chris Lattner
fb5179a2fa fix PR10286, a problem with the .ll printer handling block addresses that are out-of-scope. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136768 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-03 06:15:41 +00:00
Nick Lewycky
d5061a9268 Fix logical error when detecting lifetime intrinsics. 
Don't replace a gep/bitcast with 'undef' because that will form a "free(undef)"
which in turn means "unreachable". What we wanted was a no-op. Instead, analyze
the whole tree and look for all the instructions we need to delete first, then
delete them second, not relying on the use_list to stay consistent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136752 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-03 00:43:35 +00:00
Nick Lewycky
d8030c79fd Teach InstCombine that lifetime intrincs aren't a real user on the result of a 
malloc call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136732 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-02 22:08:01 +00:00
Nick Lewycky
3e69c13c30 Lifetime intrinsics on undef are dead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136722 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-02 21:19:27 +00:00
Benjamin Kramer
7a3824b923 Remove empty test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136675 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-02 02:47:45 +00:00
Owen Anderson
9b7fdc7e8a Revert r136503 and r136480 in an effort to fix non-determinism in the llvm-gcc buildbots on i386. Devang is looking into the root cause. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136674 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-02 02:23:42 +00:00
Rafael Espindola
592ad6a82f Add a small gep optimization I noticed was missing while reading some IL. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136585 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-31 04:43:41 +00:00
Devang Patel
1619560521 Clean up debug info after reassociation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136480 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-29 19:00:35 +00:00
Eli Friedman
ef71597242 Make sure to correctly clear the exact/nuw/nsw flags off of shifts when they are combined together. <rdar://problem/9859829> 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136435 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-29 00:18:19 +00:00
Nick Lewycky
e511186183 Teach the ConstantMerge pass about alignment. Fixes PR10514! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136250 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-27 19:47:34 +00:00
Nick Lewycky
5a1cb644c9 Finish adding support for lifetime intrinsics to SROA. Fixes PR10121! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136008 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-25 23:14:22 +00:00
Dan Gohman
4428069f10 Move the last uses of RetainFunc etc. over to using getRetainCallee() etc. 
so that a declaration for objc_retain is created when needed if it doesn't
already exist. rdar://9825114.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135821 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-22 22:29:21 +00:00
Dan Gohman
856e13ddac Fix MergeInVectorType to check for vector types with the same alloc 
size but different element types, so that it filters out the cases
that CreateShuffleVectorCast doesn't handle. This fixes rdar://9786827.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135721 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-21 23:30:09 +00:00
Andrew Trick
c205a094bd LSR, correct fix for rdar://9786536. Silly casting bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135654 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-21 01:45:54 +00:00
Andrew Trick
c2c988e5e0 LSR must sometimes sign-extend before generating double constants. 
rdar://9786536


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135650 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-21 01:05:01 +00:00
Andrew Trick
37eb38d3f8 LSR crashes on an empty IVUsers list. 
rdar://9786536


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135644 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-21 00:40:04 +00:00
Eli Friedman
73bfa4aecf Bring LICM into compliance with the new "Memory Model for Concurrent Operations" in LangRef. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135625 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 21:37:47 +00:00
Andrew Trick
86c98145b2 indvars: Added getInsertPointForUses to find a valid place to truncate the IV. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135568 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 05:32:06 +00:00
Andrew Trick
9e92152f77 indvars test case for r135558. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135559 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 02:14:37 +00:00
Andrew Trick
f22d95749a indvars -disable-iv-rewrite fix: derived GEP IVs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135558 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 02:08:58 +00:00
Eli Friedman
3610604086 PR10386: Don't try to split an edge from an indirectbr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135534 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-19 22:59:41 +00:00
Nick Lewycky
bb2518c716 Remove bogus test: for all possible inputs of %X, the 'sub nsw' is guaranteed 
to perform a signed wrap. Don't rely on any particular handling of that case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135471 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-19 08:22:57 +00:00
Andrew Trick
fc933c073e indvars: LinearFunctionTestReplace for non-canonical IVs. 
For -disable-iv-rewrite, perform LFTR without generating a new
"canonical" induction variable. Instead find the "best" existing
induction variable for use in the loop exit test and compute the final
value of that IV for use in the new loop exit test. In short,
convert to a simple eq/ne exit test as long as it's cheap to do so.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135420 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-18 20:32:31 +00:00
Chad Rosier
72d6f34af1 A real testcase for r135286. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135299 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-15 20:58:38 +00:00
Chad Rosier
96a7db084f Add testcase for r135286. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135291 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-15 19:06:58 +00:00
Evan Cheng
3fd6e755d0 Change test case, one that actually failed before my commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135064 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 19:19:44 +00:00
Evan Cheng
93a635c82c It's not safe to fold (fptrunc (sqrt (fpext x))) to (sqrtf x) if there is another use of sqrt. rdar://9763193 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135058 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 19:08:16 +00:00
Rafael Espindola
b5a12dd12f Don't duplicate the work done by a gep into a "bitcast" if the gep has 
more than one use.

Fixes PR10322.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134883 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-11 03:43:47 +00:00
Chris Lattner
1afcace3a3 Land the long talked about "type system rewrite" patch. This 
patch brings numerous advantages to LLVM.  One way to look at it
is through diffstat:
 109 files changed, 3005 insertions(+), 5906 deletions(-)

Removing almost 3K lines of code is a good thing.  Other advantages
include:

1. Value::getType() is a simple load that can be CSE'd, not a mutating
   union-find operation.
2. Types a uniqued and never move once created, defining away PATypeHolder.
3. Structs can be "named" now, and their name is part of the identity that
   uniques them.  This means that the compiler doesn't merge them structurally
   which makes the IR much less confusing.
4. Now that there is no way to get a cycle in a type graph without a named
   struct type, "upreferences" go away.
5. Type refinement is completely gone, which should make LTO much MUCH faster
   in some common cases with C++ code.
6. Types are now generally immutable, so we can use "Type *" instead 
   "const Type *" everywhere.

Downsides of this patch are that it removes some functions from the C API,
so people using those will have to upgrade to (not yet added) new API.  
"LLVM 3.0" is the right time to do this.

There are still some cleanups pending after this, this patch is large enough
as-is.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134829 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-09 17:41:24 +00:00
Chris Lattner
5445ecdf69 more tests not making the jump into the brave new world. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134820 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-09 16:57:10 +00:00
Lang Hames
f86a547419 Added test cases for GVN signed intrinsics recognition, r134777. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134778 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-09 00:36:54 +00:00
Lang Hames
1fb0955cab Make GVN look through extractvalues for recognised intrinsics. GVN can then CSE ops that match values produced by the intrinsics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134677 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-08 01:50:54 +00:00
Andrew Trick
037d1c0c7e indvars -disable-iv-rewrite: Added SimplifyCongruentIVs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134530 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-06 20:50:43 +00:00
Tobias Grosser
df7102b7d6 LICM: Do not loose alignment on promotion 
The promotion code lost any alignment information, when hoisting loads and
stores out of the loop. This lead to incorrect aligned memory accesses. We now
use the largest alignment we can prove to be correct.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134520 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-06 19:19:55 +00:00