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c6b59b889b
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5865 Commits

Author SHA1 Message Date
Benjamin Kramer
c6b59b889b Eliminate some temporaries. 
llvm-svn: 85896
 2009-11-03 12:52:50 +00:00
Chris Lattner
9d0f925cf0 remove a isFreeCall check: it is a callinst that can write to memory already. 
llvm-svn: 85863
 2009-11-03 05:33:46 +00:00
Ted Kremenek
cd7ab8bfa0 Alphabetize. 
llvm-svn: 85859
 2009-11-03 04:01:53 +00:00
Chris Lattner
b1dfdadabd turn IPSCCP back on now that the iterator invalidation bug is fixed. 
llvm-svn: 85858
 2009-11-03 03:42:51 +00:00
Chris Lattner
00c9eb665d fix a nasty iterator invalidation bug from my conversion from 
std::map to DenseMap, exposed on release llvm-gcc bootstrap.

llvm-svn: 85840
 2009-11-02 23:25:39 +00:00
Chris Lattner
6f515d4ba8 revert r8579[56], which are causing unhappiness in buildbot land. 
llvm-svn: 85818
 2009-11-02 19:31:10 +00:00
Chris Lattner
a1776913ab disable IPSCCP support for multiple return values, it is buggy, so just 
disable it until I can fix it.

llvm-svn: 85810
 2009-11-02 18:22:51 +00:00
Chris Lattner
f1afb57935 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.

llvm-svn: 85795
 2009-11-02 07:33:59 +00:00
Chris Lattner
c9279a9b4d don't mark the arguments of prototype overdefined, they will never be queried. 
llvm-svn: 85793
 2009-11-02 06:34:04 +00:00
Chris Lattner
9c7e443b07 restore some code I removed in r85788, refactor it into 
a shared place instead of duplicating it 4 times.

llvm-svn: 85792
 2009-11-02 06:28:16 +00:00
Chris Lattner
23f5603692 remove some confused code that dates from when we had 
"multiple return values" but not "first class aggregates"

llvm-svn: 85791
 2009-11-02 06:17:06 +00:00
Chris Lattner
c670f866ce avoid redundant lookups in BBExecutable, and make it a SmallPtrSet. 
llvm-svn: 85790
 2009-11-02 06:11:23 +00:00
Chris Lattner
16b825e51f Use the libanalysis 'ConstantFoldLoadFromConstPtr' function 
instead of reinventing SCCP-specific logic.  This gives us
new powers.

llvm-svn: 85789
 2009-11-02 06:06:14 +00:00
Chris Lattner
32acebedf7 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.

llvm-svn: 85788
 2009-11-02 05:55:40 +00:00
Chris Lattner
9fc809ca55 fix a bug exposed by moving SRoA earlier which caused a crash building kc++ 
llvm-svn: 85786
 2009-11-02 04:37:17 +00:00
Chris Lattner
7e74831e52 only IPSCCP incoming arguments if the function is executable, this fixes 
an assertion on the buildbot.

llvm-svn: 85784
 2009-11-02 03:25:55 +00:00
Chris Lattner
0a8c553eb2 add a new ValueState::getConstantInt() helper, use it to 
simplify some code.

llvm-svn: 85783
 2009-11-02 03:21:36 +00:00
Chris Lattner
4372b58329 tidy up some more: remove some extraneous inline specifiers, return harder. 
llvm-svn: 85780
 2009-11-02 03:03:42 +00:00
Chris Lattner
1c8cb53667 eliminate the SCCPSolver::getValueMapping method. 
llvm-svn: 85778
 2009-11-02 02:54:24 +00:00
Chris Lattner
f02562df08 fix failures introduced in r85774 
llvm-svn: 85777
 2009-11-02 02:48:17 +00:00
Chris Lattner
d4f286cb0c factor duplicated code into a new DeleteInstructionInBlock 
function, eliminate temporary (and pointless) smallvector.

llvm-svn: 85776
 2009-11-02 02:47:51 +00:00
Chris Lattner
a806b18c99 Chris used to use '...' instead of proper grammar. 
llvm-svn: 85775
 2009-11-02 02:33:50 +00:00
Chris Lattner
37dc1cb0fb remove some extraneous llvmcontext stuff. 
llvm-svn: 85774
 2009-11-02 02:30:06 +00:00
Chris Lattner
28db47c45a change LatticeVal to use PointerIntPair to save some space. 
llvm-svn: 85773
 2009-11-02 02:20:32 +00:00
Chris Lattner
b94afb778c fix instcombine to only do store sinking when the alignments 
of the two loads agree.  Propagate that onto the new store.

llvm-svn: 85772
 2009-11-02 02:06:37 +00:00
Chris Lattner
f3c2039dde 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.

llvm-svn: 85738
 2009-11-01 20:07:07 +00:00
Chris Lattner
e7b1e067e9 split load sinking out to its own function, like gep sinking. 
llvm-svn: 85737
 2009-11-01 20:04:24 +00:00
Chris Lattner
b3fe1009a5 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.

llvm-svn: 85736
 2009-11-01 19:50:13 +00:00
Chris Lattner
888d78216f cleanups, switch GlobalDCE to SmallPtrSet instead of std::set 
llvm-svn: 85730
 2009-11-01 19:03:42 +00:00
Chris Lattner
ad2926bbb4 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.

llvm-svn: 85728
 2009-11-01 18:42:03 +00:00
Chris Lattner
02e43b65d1 improve comment. 
llvm-svn: 85725
 2009-11-01 18:17:37 +00:00
Douglas Gregor
16c6819959 Reverting 85714, 85715, 85716, which are breaking the build 
llvm-svn: 85717
 2009-11-01 16:42:53 +00:00
Dan Gohman
1d0b06c139 Remove the #include of Pass.h from PassManager.h. This breaks a significant 
#include dependency, as frontends commonly pull in PassManager.h.

llvm-svn: 85714
 2009-11-01 15:20:19 +00:00
Chris Lattner
d8f9d01b76 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.

llvm-svn: 85709
 2009-11-01 06:11:53 +00:00
Chris Lattner
c340ce422d 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.

llvm-svn: 85708
 2009-11-01 04:57:33 +00:00
Chris Lattner
746b4c0b20 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.

llvm-svn: 85707
 2009-11-01 04:23:20 +00:00
Chris Lattner
0ee6bbbeb1 if CostMetrics says to never duplicate some code, don't unswitch a loop. 
This prevents unswitching from duplicating indbr's.

llvm-svn: 85705
 2009-11-01 03:42:55 +00:00
Chris Lattner
e7dc33941b constant fold indirectbr(blockaddress(%bb)) -> br label %bb. 
llvm-svn: 85704
 2009-11-01 03:40:38 +00:00
Chris Lattner
2bbe57b2b8 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.

llvm-svn: 85699
 2009-11-01 01:27:45 +00:00
Chris Lattner
1f101c7a1a Make sure PRE doesn't split crit edges from indirectbr. 
llvm-svn: 85692
 2009-10-31 22:11:15 +00:00
Chris Lattner
43591a021a llvm::SplitEdge should refuse to split an edge from an indirectbr. 
Fix CodeGenPrepare to not try to split edges from indirectbr.

llvm-svn: 85690
 2009-10-31 22:04:43 +00:00
Chris Lattner
ea1bebaa65 update the comment above llvm::SplitCriticalEdge, and make 
it abort on IndirectBrInst as describe in the comment.

llvm-svn: 85688
 2009-10-31 21:51:10 +00:00
Chris Lattner
48de74645e adjust a couple xforms to work with null bb's in BlockAddress. 
llvm-svn: 85680
 2009-10-31 20:13:24 +00:00
Chris Lattner
0be6fcef18 add a comment. 
llvm-svn: 85671
 2009-10-31 17:48:31 +00:00
Dan Gohman
61e806613f 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.

llvm-svn: 85670
 2009-10-31 17:33:01 +00:00
Dan Gohman
cb32fa9e90 Remove redundant code. 
llvm-svn: 85668
 2009-10-31 16:16:41 +00:00
Dan Gohman
40cec16be1 Merge the enhancements from LoopUnroll's FoldBlockIntoPredecessor into 
MergeBlockIntoPredecessor. This makes SimplifyCFG slightly more aggressive,
and makes it unnecessary for LoopUnroll to have its own copy of this code.

llvm-svn: 85667
 2009-10-31 16:08:00 +00:00
Dan Gohman
0079f87732 Rename forgetLoopBackedgeTakenCount to forgetLoop, because it 
clears out more information than just the stored backedge taken count.

llvm-svn: 85664
 2009-10-31 15:04:55 +00:00
Dan Gohman
de593b49b6 Replace LoopUnrollPass.cpp's custom code-size estimation code using 
the new common CodeMetrics code.

llvm-svn: 85663
 2009-10-31 14:54:17 +00:00
Dan Gohman
14d0be4693 Simplify this code. 
llvm-svn: 85662
 2009-10-31 14:46:50 +00:00