Commit Graph

357 Commits

Author SHA1 Message Date
John Criswell
e7b9a1a5f2 Fix a bug in the -deadtypeelim pass. The SymbolTable re-write changed it
to eliminate the wrong type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13855 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-27 21:16:46 +00:00
Reid Spencer
9231ac8b6f Convert to SymbolTable's new iteration interface.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13754 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-25 08:53:40 +00:00
Chris Lattner
b11a99bd39 Fix a bug in my previous checkin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13717 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-24 06:24:46 +00:00
Chris Lattner
befa499d45 Fix cases where we missed inlining some more obvious candidates because the
caller was in an SCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13693 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-23 21:22:17 +00:00
Chris Lattner
74c68ffd5f Simplify the interface and remove an unneeded #include
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13692 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-23 21:21:35 +00:00
Chris Lattner
9e7cc2f0d4 Fairly substantial changes to update the alias analysis we are querying as
we make the transformation.  This allows us to use interprocedural alias
analyses successfully.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13691 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-23 21:21:17 +00:00
Misha Brukman
7d248397a7 Clarify the logic: the flag is renamed to `deleteFn' to signify it will delete
the function instead of isolating it. This also means the condition is reversed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13112 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-22 23:00:51 +00:00
Misha Brukman
79906c9825 Add a flag to choose between isolating a function or deleting the function from
the Module. The default behavior keeps functionality as before: the chosen
function is the one that remains.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13111 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-22 22:52:22 +00:00
Chris Lattner
3e1358a9fa Fix an incredibly nasty iterator invalidation problem. I am too spoiled by ilists :)
Eventually it would be nice if CallGraph maintained an ilist of CallGraphNode's instead
of a vector of pointers to them, but today is not that day.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13100 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-21 20:44:33 +00:00
Chris Lattner
107fb18d89 Fix typeo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13089 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-21 14:23:18 +00:00
Chris Lattner
68d57e7ae8 REALLY fix PR324: don't delete linkonce functions until after the SCC traversal
is done, which avoids invalidating iterators in the SCC traversal routines


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13088 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-20 22:06:53 +00:00
Chris Lattner
5ad2b1d544 Fix PR324 and testcase: Inline/2004-04-20-InlineLinkOnce.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13080 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-20 20:20:59 +00:00
Chris Lattner
f1ab4b4eac Change the ExitBlocks list from being explicitly contained in the Loop
structure to being dynamically computed on demand.  This makes updating
loop information MUCH easier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13045 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-18 22:14:10 +00:00
Chris Lattner
ce1a3a292d Actually update the call graph as the inliner changes it. This allows us to
execute other CallGraphSCCPasses after the inliner without crashing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12861 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-12 05:37:29 +00:00
Chris Lattner
85eb157d96 Stop printing Function*
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12857 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-12 04:06:56 +00:00
Chris Lattner
d08ddd3300 Simplify code a bit, and be sure to mark the external node as potentially throwing
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12856 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-12 04:06:38 +00:00
Chris Lattner
775cbdd51a Remove the "really gross hacks" that are there to deal with recursive functions.
Now we collect all of the call sites we are interested in inlining, then inline
them.  This entirely avoids issues with trying to inline a call site we got by
inlining another call site.  This also eliminates iterator invalidation issues.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12770 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-08 06:34:31 +00:00
Chris Lattner
f6e43bc796 Add statistics to the loop extractor. The loop extractor has successfully
extracted all 63 loops for Olden/bh without crashing and without
miscompiling the program!!!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12491 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-18 05:46:10 +00:00
Chris Lattner
fdded9f95a Fix problem with PHI nodes having multiple predecessors from different
exit nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12490 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-18 05:43:18 +00:00
Chris Lattner
369287bab5 The code extractor needs dominator info. Provide it
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12483 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-18 03:48:06 +00:00
Chris Lattner
6dd196f762 Restore old inlining heuristic. As the comment indicates, this is a nasty
horrible hack.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12423 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-15 06:38:14 +00:00
Chris Lattner
5156c39d64 Fix several bugs in the loop extractor. In particular, subloops were never
extracted, and a function that contained a single top-level loop never had
the loop extracted, regardless of how much non-loop code there was.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12403 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-15 00:02:02 +00:00
Chris Lattner
41bc0b069c Split into two passes. Now there is the general loop extractor, usable on
the command line, and the single loop extractor, usable by bugpoint


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12390 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 20:01:36 +00:00
Chris Lattner
97836fad2c Passes don't print stuff!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12385 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 04:17:53 +00:00
Chris Lattner
16d0eb0468 FunctionPass's should not define their own 'run' method.
Require 'simplified' loops, not just raw natural loops.  This fixes
CodeExtractor/2004-03-13-LoopExtractorCrash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12381 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 04:01:06 +00:00
Chris Lattner
1e3cb34753 Move prototype to IPO.h instead of Scalar.h
Make sure that the file interface header (IPO.h) is included first
remove dead #incldue


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12375 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 02:37:16 +00:00
Chris Lattner
efddcfa0df Indent anon namespace properly, add copyright block
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12373 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 02:34:07 +00:00
Chris Lattner
c3c8703c3b Move to the IPO library. Utils shouldn't contain passes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12372 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 02:32:27 +00:00
Chris Lattner
a2dc727ac4 DemoteRegToStack got moved from DemoteRegToStack.h to Local.h
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12368 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 02:13:38 +00:00
Chris Lattner
619d3544b1 This change makes two big adjustments.
* Be a lot more accurate about what the effects will be when inlining a call
   to a function when an argument is an alloca.
 * Dramatically reduce the penalty for inlining a call in a large function.
   This heuristic made it almost impossible to inline a function into a large
   function, no matter how small the callee is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12363 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-13 23:15:45 +00:00
Chris Lattner
9440db8866 Implement ArgumentPromotion/aggregate-promote.ll
This allows pointers to aggregate objects, whose elements are only read, to
be promoted and passed in by element instead of by reference.  This can
enable a LOT of subsequent optimizations in the caller function.

It's worth pointing out that this stuff happens a LOT of C++ programs, because
objects in templates are generally passed around by reference.  When these
templates are instantiated on small aggregate or scalar types, however, it is
more efficient to pass them in by value than by reference.

This transformation triggers most on C++ codes (e.g. 334 times on eon), but
does happen on C codes as well.  For example, on mesa it triggers 72 times,
and on gcc it triggers 35 times.  this is amazingly good considering that
we are using 'basicaa' so far.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12202 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-08 01:04:36 +00:00
Chris Lattner
86a734bd40 Implement: ArgumentPromotion/chained.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12200 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-07 22:52:53 +00:00
Chris Lattner
7db5a6df78 Fix another minor bug, exposed by perlbmk
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12198 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-07 22:43:27 +00:00
Chris Lattner
7e6f5090af Fix a minor bug and turn debug output into, well, debug output.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12195 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-07 21:54:50 +00:00
Chris Lattner
ed570a7dca New LLVM pass: argument promotion. This version only handles simple scalar
variables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12193 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-07 21:29:54 +00:00
Misha Brukman
99cc88bb64 * Remove function to find "main" in a Module, there's a method for that
* Removing extraneous empty space and empty comment lines


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12014 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-29 23:09:10 +00:00
Chris Lattner
7d90a2738e setcond instructions don't have aliasing implications.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11919 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-27 18:09:25 +00:00
Chris Lattner
4f77caaa3d Since LLVM uses structure type equivalence, it isn't useful to keep around
multiple type names for the same structural type.  Make DTE eliminate all
but one of the type names


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11879 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-26 20:02:23 +00:00
Chris Lattner
079236d1c9 My faith in programmers has been found to be totally misplaced. One would
assume that if they don't intend to write to a global variable, that they
would mark it as constant.  However, there are people that don't understand
that the compiler can do nice things for them if they give it the information
it needs.

This pass looks for blatently obvious globals that are only ever read from.
Though it uses a trivially simple "alias analysis" of sorts, it is still able
to do amazing things to important benchmarks.  253.perlbmk, for example,
contains several ***GIANT*** function pointer tables that are not marked
constant and should be.  Marking them constant allows the optimizer to turn
a whole bunch of indirect calls into direct calls.  Note that only a link-time
optimizer can do this transformation, but perlbmk does have several strings
and other minor globals that can be marked constant by this pass when run
from GCCAS.

176.gcc has a ton of strings and large tables that are marked constant, both
at compile time (38 of them) and at link time (48 more).  Other benchmarks
give similar results, though it seems like big ones have disproportionally
more than small ones.

This pass is extremely quick and does good things.  I'm going to enable it
in gccas & gccld.  Not bad for 50 SLOC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11836 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-25 21:34:36 +00:00
Chris Lattner
0db085baec Intrinsic functions cannot throw
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11383 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-13 16:46:46 +00:00
Chris Lattner
68b86f4f41 Don't depend on auto data conversion
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11229 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-09 05:16:30 +00:00
Chris Lattner
d21cd809b6 Adjust to the changed StructType interface. In particular, getElementTypes() is gone.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11228 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-09 04:37:31 +00:00
Chris Lattner
d5d8996720 Start using the new and improve interface to FunctionType arguments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11224 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-09 04:14:01 +00:00
Chris Lattner
aeb2a1d708 rename the "exceptional" destination of an invoke instruction to the 'unwind' dest
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11202 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-08 21:44:31 +00:00
Chris Lattner
e0def04e43 Fix PR225: [pruneeh] -pruneeh pass removes invoke instructions it shouldn't
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11200 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-08 21:15:59 +00:00
Chris Lattner
edb1cf0c19 splitBasicBlock "does the right thing" now, no reason to reposition it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11199 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-08 20:49:07 +00:00
Chris Lattner
3b332fd376 Remove unneeded code now that splitBasicBlock does the "right thing"
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11111 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-04 03:21:51 +00:00
Brian Gaeke
09ca4115ee Make deadarghaX0r warning louder.
(I just love typing haX0r.   haX0r haX0r haX0r.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11079 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-02 19:32:27 +00:00
Chris Lattner
21949d9088 Remove dependence on structure index type. s/MT/FT
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10726 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09 06:02:51 +00:00
Chris Lattner
0898c78a52 Merging constants can cause further room for improvement. Iterate until
we converge


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10618 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 07:19:08 +00:00