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5865 Commits

Author SHA1 Message Date
Chris Lattner
fc36a562ae reimplement multiple return value handling in IPSCCP, making it 
more aggressive an correct.  This survives building llvm in 64-bit
mode with optimizations and the built llvm passes make check.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85973 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 23:40:48 +00:00
Chris Lattner
abf67ef548 finish half thunk thought 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85937 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 20:52:57 +00:00
Chris Lattner
2396cc37ae fix an IPSCCP bug I introduced when I changed IPSCCP to start working on 
functions that don't have local linkage.  Basically, we need to be more
careful about propagating argument information to functions whose results
we aren't tracking.  This fixes a miscompilation of 
LLVMCConfigurationEmitter.cpp when built with an llvm-gcc that has ipsccp
enabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85923 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 19:24:51 +00:00
Chris Lattner
c175e5de2d fix a subtle bug I introduced when refactoring SCCP. Testcase 
to follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85903 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 16:50:11 +00:00
Benjamin Kramer
419e44edab Eliminate some temporaries. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85896 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 12:52:50 +00:00
Chris Lattner
938e176633 remove a isFreeCall check: it is a callinst that can write to memory already. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85863 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 05:33:46 +00:00
Ted Kremenek
8ab51e3041 Alphabetize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85859 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 04:01:53 +00:00
Chris Lattner
14532d03a1 turn IPSCCP back on now that the iterator invalidation bug is fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85858 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 03:42:51 +00:00
Chris Lattner
5cc66d979d fix a nasty iterator invalidation bug from my conversion from 
std::map to DenseMap, exposed on release llvm-gcc bootstrap.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85840 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 23:25:39 +00:00
Chris Lattner
3774c91854 revert r8579[56], which are causing unhappiness in buildbot land. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85818 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 19:31:10 +00:00
Chris Lattner
2bbbbd6ac8 disable IPSCCP support for multiple return values, it is buggy, so just 
disable it until I can fix it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85810 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 18:22:51 +00:00
Chris Lattner
12c8d5f5fe improve IPSCCP to be able to propagate the result of "!mayBeOverridden" 
function to calls of that function, regardless of whether it has local
linkage or has its address taken.  Not escaping should only affect 
whether we make an aggressive assumption about the arguments to a 
function, not whether we can track the result of it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85795 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 07:33:59 +00:00
Chris Lattner
ff3ca15951 don't mark the arguments of prototype overdefined, they will never be queried. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85793 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 06:34:04 +00:00
Chris Lattner
e01985c95f restore some code I removed in r85788, refactor it into 
a shared place instead of duplicating it 4 times.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85792 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 06:28:16 +00:00
Chris Lattner
574fa9e83c remove some confused code that dates from when we had 
"multiple return values" but not "first class aggregates"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85791 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 06:17:06 +00:00
Chris Lattner
09275299e2 avoid redundant lookups in BBExecutable, and make it a SmallPtrSet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85790 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 06:11:23 +00:00
Chris Lattner
5638dc618a Use the libanalysis 'ConstantFoldLoadFromConstPtr' function 
instead of reinventing SCCP-specific logic.  This gives us
new powers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85789 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 06:06:14 +00:00
Chris Lattner
2a0433beea switch the main 'ValueState' map from being an std::map to being 
a DenseMap.  Doing this required being aware of subtle iterator
invalidation issues, but it provides a big speedup.  In a 
release-asserts build, this sped up optimizing 403.gcc from
1.34s -> 0.79s (IPSCCP) and 1.11s -> 0.44s (SCCP).

This commit also conflates in a bunch of general cleanups, sorry.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85788 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 05:55:40 +00:00
Chris Lattner
794c15dc71 fix a bug exposed by moving SRoA earlier which caused a crash building kc++ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85786 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 04:37:17 +00:00
Chris Lattner
89112b608f only IPSCCP incoming arguments if the function is executable, this fixes 
an assertion on the buildbot.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85784 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 03:25:55 +00:00
Chris Lattner
36c9952b1b add a new ValueState::getConstantInt() helper, use it to 
simplify some code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85783 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 03:21:36 +00:00
Chris Lattner
38871e4c3b tidy up some more: remove some extraneous inline specifiers, return harder. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85780 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 03:03:42 +00:00
Chris Lattner
8db50122a4 eliminate the SCCPSolver::getValueMapping method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85778 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:54:24 +00:00
Chris Lattner
301a2792be fix failures introduced in r85774 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85777 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:48:17 +00:00
Chris Lattner
cc4f60b113 factor duplicated code into a new DeleteInstructionInBlock 
function, eliminate temporary (and pointless) smallvector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85776 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:47:51 +00:00
Chris Lattner
2f09625a9f Chris used to use '...' instead of proper grammar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85775 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:33:50 +00:00
Chris Lattner
ea0db070a1 remove some extraneous llvmcontext stuff. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85774 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:30:06 +00:00
Chris Lattner
7927220aef change LatticeVal to use PointerIntPair to save some space. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85773 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:20:32 +00:00
Chris Lattner
7ebbabf500 fix instcombine to only do store sinking when the alignments 
of the two loads agree.  Propagate that onto the new store.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85772 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 02:06:37 +00:00
Chris Lattner
a664bb7bdc when merging two loads, make sure to take the min of their alignment, 
not the max.  This didn't matter until the previous patch because
instcombine would refuse to sink loads with differenting alignments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85738 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 20:07:07 +00:00
Chris Lattner
751a362c22 split load sinking out to its own function, like gep sinking. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85737 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 20:04:24 +00:00
Chris Lattner
e3c6281a98 fix a bug noticed by inspection: when instcombine sinks loads through 
phis, it didn't preserve the alignment of the load.  This is a missed
optimization of the alignment is high and a miscompilation when the
alignment is low.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85736 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 19:50:13 +00:00
Chris Lattner
ec4c7b9766 cleanups, switch GlobalDCE to SmallPtrSet instead of std::set 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85730 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 19:03:42 +00:00
Chris Lattner
c4775e4b97 remove a bunch of locking from LLVMContextImpl. Since only one thread 
can be banging on a context at a time, this isn't needed.  Owen, please
review.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85728 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 18:42:03 +00:00
Chris Lattner
280f3fedbf improve comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85725 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 18:17:37 +00:00
Douglas Gregor
076124ef26 Reverting 85714, 85715, 85716, which are breaking the build 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85717 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 16:42:53 +00:00
Dan Gohman
b2fae7560d Remove the #include of Pass.h from PassManager.h. This breaks a significant 
#include dependency, as frontends commonly pull in PassManager.h.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85714 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 15:20:19 +00:00
Chris Lattner
b2710041fb teach ipsccp and ipconstprop that a blockaddress doesn't 'take the address' of a function 
in a way that should prevent ip constprop.  This allows clang/test/CodeGen/indirect-goto.c
to pass with the new indirect goto lowering.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85709 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 06:11:53 +00:00
Chris Lattner
882029269e change llvm::MergeBlockIntoPredecessor to not merge two blocks BB1->BB2 
when BB2 has its address taken.  Since it ends up doing BB2->rauw(BB1),
this can cause the address of the entry block to be taken.  Since it is
generally undesirable to nuke blocks whose address is taken, even when
we can, just unconditionally stop this xform.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85708 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 04:57:33 +00:00
Chris Lattner
0b649dd91f strengthen an assumption: RevectorBlockTo knows that PredBB 
ended in an uncond branch because the pass requires BreakCriticalEdges.

However, BCE doesn't eliminate critical adges from indbrs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85707 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 04:23:20 +00:00
Chris Lattner
da9c281121 if CostMetrics says to never duplicate some code, don't unswitch a loop. 
This prevents unswitching from duplicating indbr's.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85705 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 03:42:55 +00:00
Chris Lattner
0a4c6789d5 constant fold indirectbr(blockaddress(%bb)) -> br label %bb. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85704 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 03:40:38 +00:00
Chris Lattner
cdfc940912 Revert 85678/85680. The decision is to stay with the current form of 
indirectbr, thus we don't need "blockaddr(@func, null)".  Eliminate it
for simplicity.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85699 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-01 01:27:45 +00:00
Chris Lattner
fb6e701f08 Make sure PRE doesn't split crit edges from indirectbr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85692 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 22:11:15 +00:00
Chris Lattner
a4b04210d4 llvm::SplitEdge should refuse to split an edge from an indirectbr. 
Fix CodeGenPrepare to not try to split edges from indirectbr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85690 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 22:04:43 +00:00
Chris Lattner
1b98ff3e4f update the comment above llvm::SplitCriticalEdge, and make 
it abort on IndirectBrInst as describe in the comment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85688 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 21:51:10 +00:00
Chris Lattner
c1dc35094e adjust a couple xforms to work with null bb's in BlockAddress. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85680 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 20:13:24 +00:00
Chris Lattner
28f3d34a9b add a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85671 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 17:48:31 +00:00
Dan Gohman
438b583dbd Revert r85667. LoopUnroll currently can't call utility functions which 
auto-update the DominatorTree because it doesn't keep the DominatorTree
current while it works.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85670 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 17:33:01 +00:00
Dan Gohman
dca094100b Remove redundant code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85668 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 16:16:41 +00:00