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1198 Commits

Author SHA1 Message Date
Chris Lattner
49d166c6b6 Don't make this require loopsimplify. It works BETTER with loop simplify 
but should not require it.

llvm-svn: 21123
 2005-04-06 21:45:00 +00:00
Chris Lattner
c5b8fbe7f9 do not crash when using -debug 
llvm-svn: 21092
 2005-04-05 01:12:03 +00:00
Chris Lattner
57ea4daa2e do not dereference an extra layer of pointers to determine if an external 
call can modify a memory location.  This fixes
test/Regression/Analysis/Andersens/modreftest.ll

llvm-svn: 21088
 2005-04-04 22:23:21 +00:00
Chris Lattner
0938200804 fix some VC compilation problems, thanks to Jeff C for pointing this out! 
llvm-svn: 21044
 2005-04-02 20:17:09 +00:00
Chris Lattner
e6d28e8aac EquivClassGraphs is now in DataStructure.h 
llvm-svn: 21042
 2005-04-02 20:08:17 +00:00
Chris Lattner
54ab60f08d use a callee_iterator typedef. 
llvm-svn: 21038
 2005-04-02 20:02:41 +00:00
Chris Lattner
23ef46ddca Change the ActualCallees callgraph from hash_multimap<Instruction,Function> 
to std::set<std::pair<Inst,Func>> to avoid duplicate entries.

This speeds up the CompleteBU pass from 1.99s to .15s on povray and the
eqgraph passes from 1.5s to .16s on the same.

llvm-svn: 21031
 2005-04-02 19:17:18 +00:00
Chris Lattner
761bb09edb import all of the rest of the stubs that dsa uses for direct comparison 
llvm-svn: 20932
 2005-03-29 20:36:05 +00:00
Chris Lattner
94ea4d104c learn about some more functions. 
llvm-svn: 20929
 2005-03-29 20:04:24 +00:00
Chris Lattner
cc1644eb2c Fix a problem where we not marking incoming arguments to functions with 
external linkage as incomplete.

llvm-svn: 20927
 2005-03-29 19:16:59 +00:00
Chris Lattner
39064a8ca0 there is no point comparing against null pointer. 
llvm-svn: 20925
 2005-03-29 17:44:52 +00:00
Chris Lattner
5ceaf630ab Fix a major problem with global variable initializers. This could cause 
us to have stuff pointing to the null pointer, which makes no sense
(the null ptr is an ssa value, not the null object)

llvm-svn: 20922
 2005-03-29 17:21:53 +00:00
Chris Lattner
4f9c2cde55 add some more functions, ignore setcc for constraints! 
llvm-svn: 20917
 2005-03-29 06:52:20 +00:00
Chris Lattner
813ef90a12 Handle "known" external calls context sensitively, add support for realloc 
and a couple of other functions that are important.

Handle aggregate undef values for gv initializers

llvm-svn: 20914
 2005-03-29 06:09:07 +00:00
Chris Lattner
47fcba56f8 Teach andersens that non-escaping memory cannot be mod/ref'd by external fn calls. 
llvm-svn: 20891
 2005-03-28 06:21:17 +00:00
Misha Brukman
b97b449309 Fix grammar 
llvm-svn: 20890
 2005-03-28 04:32:12 +00:00
Chris Lattner
abb512a593 Make anders-aa much more precise by not being completely pessimistic about 
external functions.  Teach it about a few important ones.

llvm-svn: 20889
 2005-03-28 04:03:52 +00:00
Chris Lattner
691b1987e1 wrap some long lines 
llvm-svn: 20884
 2005-03-27 22:03:46 +00:00
Chris Lattner
6b31704450 remove ... 
llvm-svn: 20883
 2005-03-27 21:57:09 +00:00
Chris Lattner
15741f8877 speed up steens by using spliceFrom, improve its precision by realizing that 
an incomplete node cannot alias a complete node.

llvm-svn: 20882
 2005-03-27 21:56:55 +00:00
Chris Lattner
7f0903e187 teach andersens about undef 
llvm-svn: 20881
 2005-03-27 18:58:23 +00:00
Chris Lattner
de6cc372e3 Don't give up completely, maybe other AA can say something about this. 
llvm-svn: 20873
 2005-03-27 00:02:33 +00:00
Chris Lattner
3a88055932 Factor out percentage printing into its own function. Make two changes to 
the function: print more precision XX.X% instead of XX%, and cast to ULL
before scaling by 100/1000 to avoid wrap around for large numbers of queries
(such as occur for 253.perlbmk and 176.gcc)

llvm-svn: 20872
 2005-03-26 23:56:33 +00:00
Chris Lattner
b84076a278 Cache mapping information for a call site after computing it for a mod/ref 
query.  If the next mod/ref query happens to be for the same call site
(which is extremely likely), use the cache instead of recomputing the
callee/caller mapping.  This makes -aa-eval ***MUCH*** faster with
ds-aa

llvm-svn: 20871
 2005-03-26 23:29:03 +00:00
Chris Lattner
21d25dd835 Remove more long dead code: dsa doesn't provide must alias info 
llvm-svn: 20870
 2005-03-26 22:54:46 +00:00
Chris Lattner
8638fbf4d6 remove some unsafe code that has long been dead 
llvm-svn: 20869
 2005-03-26 22:48:42 +00:00
Chris Lattner
ee96215ded slightly improve mod/ref for DSAA by checking the globals graph for fallback 
llvm-svn: 20868
 2005-03-26 22:47:03 +00:00
Chris Lattner
02275101be Teach steens-aa two things about mod/ref information: 
1. If memory never escapes the program, it cannot be mod/ref'd by external
     functions.
  2. If memory is global never mod/ref'd in the program, it cannot be mod/ref'd
     by any call.

llvm-svn: 20867
 2005-03-26 22:43:20 +00:00
Chris Lattner
bbec058833 Interchange this loop so that we test all pointers against one call site 
before moving on to the next call site.  This will be a more efficient way
to compute the mod/ref set for AA implementations like DSA.

llvm-svn: 20866
 2005-03-26 22:16:44 +00:00
Chris Lattner
d11e075664 no really, don't double count these nodes either! 
llvm-svn: 20837
 2005-03-25 20:54:45 +00:00
Chris Lattner
81e77226bb Don't count all of the nodes in the SCC once for each function in the SCC. 
llvm-svn: 20836
 2005-03-25 20:37:32 +00:00
Chris Lattner
14fd1844ba Grow the EQ classes for globals at the end of the BU pass. This shrinks 
memory usage in the TD pass for 254.gap from 31.3MB to 3.9MB.

llvm-svn: 20834
 2005-03-25 16:45:43 +00:00
Chris Lattner
549f99e537 Treat free operations as volatile, since they cannot be moved. This fixes 
Transforms/LICM/2005-03-24-LICM-Aggregate-Crash.ll

llvm-svn: 20830
 2005-03-25 05:49:37 +00:00
Chris Lattner
52e28abe6e remove a debugging timer. 
llvm-svn: 20827
 2005-03-25 00:06:09 +00:00
Chris Lattner
5d60f10a1d Two changes here: 
1. Instead of copying Local graphs to the BU graphs to start with, use
     spliceFrom to do the job (which is constant time in this case).  On
     176.gcc, this chops off .17s from the bu pass.
  2. When building SCC graphs, simplify the logic and use spliceFrom to
     do the heavy lifting, instead of cloneInto/delete.  This slices
     another .14s off 176.gcc.

llvm-svn: 20826
 2005-03-25 00:05:04 +00:00
Chris Lattner
02206c42f2 Make the spliceFrom case where one graph is completely empty be constant time. 
llvm-svn: 20825
 2005-03-25 00:02:41 +00:00
Chris Lattner
a90eb0ff31 add a new DSGraph::spliceFrom method, which violently takes the content of 
one graph and plops it into another, without breaking a sweat.

llvm-svn: 20824
 2005-03-24 23:46:04 +00:00
Chris Lattner
5f6b30b7c0 This replaces the correct but slow code with a more aggressive scc-finder 
based approach to find globals and call sites that need to be copied.  This
speeds up the BU pass on 176.gcc from 22s back up to 2.3s.  Not as good
as 1.5s, but at least it's correct :)

llvm-svn: 20820
 2005-03-24 23:06:02 +00:00
Chris Lattner
dec4b495c9 only look at successors of globals. This gets us down to "only" 22s in the 
bu pass for 176.gcc

llvm-svn: 20818
 2005-03-24 21:17:27 +00:00
Chris Lattner
0a5c8b7f21 Unfortunately, a previous patch was not safe. Revert it, reimplement 
something correct. Unfortunately this takes 176.gcc's BU phase back
up to 29s from 1.5.  This fixes DSGraph/2005-03-24-Global-Arg-Alias.ll

llvm-svn: 20817
 2005-03-24 21:07:47 +00:00
Chris Lattner
32dc61b75e don't bother |'ing in 0's 
llvm-svn: 20815
 2005-03-24 18:42:51 +00:00
Chris Lattner
0530cce5a5 be more aggressive about incompleteness marking 
llvm-svn: 20814
 2005-03-24 18:42:28 +00:00
Chris Lattner
120bfecc01 Fix a crash while promoting a value out of a loop from a global variable 
when using ds-aa

llvm-svn: 20802
 2005-03-24 04:22:04 +00:00
Chris Lattner
586f97a8b6 teach ds-aa about mod/ref for external function calls. 
llvm-svn: 20801
 2005-03-24 03:04:50 +00:00
Chris Lattner
1a860712dc Simplify dead code into a fixme :) 
llvm-svn: 20800
 2005-03-24 02:41:19 +00:00
Chris Lattner
1dfea3e0f7 fix a compiler crash in runtime/libprofile 
llvm-svn: 20799
 2005-03-24 01:22:52 +00:00
Chris Lattner
be7663e15e wrap a long line 
llvm-svn: 20797
 2005-03-23 23:51:12 +00:00
Chris Lattner
78ee200153 If we are calling an external function, chain to another AA to potentially 
decide, don't just immediately give up.

This implements GlobalsModRef/chaining-analysis.ll

llvm-svn: 20796
 2005-03-23 23:49:47 +00:00
Chris Lattner
e64b77f6c3 Make this more efficient by only making one virtual method call. 
llvm-svn: 20793
 2005-03-23 23:26:58 +00:00
Chris Lattner
db762dadcb Make this a bit more aggressive 
llvm-svn: 20792
 2005-03-23 22:06:41 +00:00