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259 Commits

Author SHA1 Message Date
Devang Patel
ab16577ade Do not let debug info prevert globalopt from shriking a global vars to boolean. 
llvm-svn: 66224
 2009-03-06 00:21:00 +00:00
Devang Patel
709d6ac46d GlobalOpt only process non constant local GVs while optimizing global vars. 
If non constant local GV named A is used by a constant local GV named B (e.g. llvm.dbg.variable) and B is not used by anyone else then eliminate A as well as B.

In other words, debug info should not interfere in removal of unused GV.
--This life, and those below, will be ignored--

M    test/Transforms/GlobalOpt/2009-03-03-dbg.ll
M    lib/Transforms/IPO/GlobalOpt.cpp

llvm-svn: 66167
 2009-03-05 18:12:02 +00:00
Bill Wendling
803da0db79 Temporarily revert r65994. It was causing rdar://6646455. 
llvm-svn: 66083
 2009-03-04 22:02:09 +00:00
Devang Patel
812459613b If a global constant is dead then global's debug info should not prevent the optimizer in deleting the global. And while deleting global, delete global's debug info also. 
llvm-svn: 65994
 2009-03-04 01:22:23 +00:00
Duncan Sands
7a1db33e77 In theory the aliasee may have dead constant users 
here.  Since we only do the transform if there is
one use, strip off any such users in the hope of
making the transform fire more often.

llvm-svn: 64926
 2009-02-18 17:55:38 +00:00
Duncan Sands
f974c5703c This transform also applies to private linkage. 
llvm-svn: 64773
 2009-02-17 17:50:04 +00:00
Duncan Sands
46196aef82 Make this more useful for cleaning up after the 
one-definition-rule llvm-gcc changes (coming soon
to a tree near you!).

llvm-svn: 64588
 2009-02-15 11:54:49 +00:00
Duncan Sands
b3f27881a9 If the target of an alias has internal linkage, then the 
alias can be morphed into the target.  Implement this
transform, and fix a crash in the existing transform at
the same time.

llvm-svn: 64583
 2009-02-15 09:56:08 +00:00
Gabor Greif
eb61fcf2a1 Simplify the logic of getting hold of a PHI predecessor block. 
There is now a direct way from value-use-iterator to incoming block in PHINode's API.
This way we avoid the iterator->index->iterator trip, and especially the costly
getOperandNo() invocation. Additionally there is now an assertion that the iterator
really refers to one of the PHI's Uses.

llvm-svn: 62869
 2009-01-23 19:40:15 +00:00
Rafael Espindola
6de96a1b5d Add the private linkage. 
llvm-svn: 62279
 2009-01-15 20:18:42 +00:00
Chris Lattner
2538eb664c rewrite OptimizeAwayTrappingUsesOfLoads to 1) avoid a temporary 
vector and extraneous loop over it, 2) not delete globals used by
phis/selects etc which could actually be useful.  This fixes PR3321.
Many thanks to Duncan for narrowing this down.

llvm-svn: 62201
 2009-01-14 00:12:58 +00:00
Duncan Sands
944ccc5d6a Correct a comment. 
llvm-svn: 62165
 2009-01-13 13:48:44 +00:00
Duncan Sands
dc020f9c3c Rename getABITypeSize to getTypePaddedSize, as 
suggested by Chris.

llvm-svn: 62099
 2009-01-12 20:38:59 +00:00
Duncan Sands
0bcf085845 Whitespace - correct formatting. 
llvm-svn: 61879
 2009-01-07 20:01:06 +00:00
Chris Lattner
0cdf52310a insert some sequence points and preincrement an iterator to avoid 
iterator invalidation problems.

llvm-svn: 61124
 2008-12-17 05:42:08 +00:00
Chris Lattner
222ef4c489 Enhance heap sra to be substantially more aggressive w.r.t PHI 
nodes.  This allows it to do fairly general phi insertion if a 
load from a pointer global wants to be SRAd but the load is used
by (recursive) phi nodes.  This fixes a pessimization on ppc
introduced by Load PRE.

llvm-svn: 61123
 2008-12-17 05:28:49 +00:00
Chris Lattner
56b55387fc Fix another crash found by inspection. If we have a PHI node merging 
the load multiple times, make sure the check the uses of the PHI to 
ensure they are transformable.

llvm-svn: 61102
 2008-12-16 21:24:51 +00:00
Chris Lattner
06a456b3f4 fix a crash found by inspection. 
llvm-svn: 61101
 2008-12-16 21:04:51 +00:00
Chris Lattner
6ddde53783 switch some std::set/std::map to SmallPtrSet/DenseMap. 
llvm-svn: 61081
 2008-12-16 07:34:30 +00:00
Chris Lattner
49e3bdc165 enhance heap-sra to apply to fixed sized array allocations, not just 
variable sized array allocations.

llvm-svn: 61051
 2008-12-15 21:44:34 +00:00
Chris Lattner
1c731fa86f Use stripPointerCasts. 
llvm-svn: 61047
 2008-12-15 21:20:32 +00:00
Chris Lattner
f0eb568021 minor tweaks for formatting, allow bitcast in ValueIsOnlyUsedLocallyOrStoredToOneGlobal. 
llvm-svn: 61046
 2008-12-15 21:08:54 +00:00
Chris Lattner
c4274a71d5 refactor some code into a new TryToOptimizeStoreOfMallocToGlobal function. 
Use GetElementPtrInst::hasAllZeroIndices where possible.

llvm-svn: 61045
 2008-12-15 21:02:25 +00:00
Devang Patel
4c758ea3e0 Large mechanical patch. 
s/ParamAttr/Attribute/g
s/PAList/AttrList/g
s/FnAttributeWithIndex/AttributeWithIndex/g
s/FnAttr/Attribute/g

This sets the stage 
- to implement function notes as function attributes and 
- to distinguish between function attributes and return value attributes.

This requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56622
 2008-09-25 21:00:45 +00:00
Anton Korobeynikov
1a1140429e Make safer variant of alias resolution routine to be default 
llvm-svn: 56005
 2008-09-09 20:05:04 +00:00
Anton Korobeynikov
a9b60ee0fc Resolve aliases, when possible 
llvm-svn: 56001
 2008-09-09 19:04:59 +00:00
Dan Gohman
a79db30d28 Tidy up several unbeseeming casts from pointer to intptr_t. 
llvm-svn: 55779
 2008-09-04 17:05:41 +00:00
Bill Wendling
f21a38700f Remove tabs. 
llvm-svn: 54707
 2008-08-12 23:15:44 +00:00
Matthijs Kooijman
8b69d77a7a Make GlobalOpt preserve address spaces when scalar replacing aggregate globals. 
llvm-svn: 53716
 2008-07-17 11:59:53 +00:00
Gabor Greif
3a9fba5a72 convert more operand loops to iterator formulation 
llvm-svn: 51663
 2008-05-29 01:59:18 +00:00
Dan Gohman
30ab45d01e Use isSingleValueType instead of isFirstClassType to 
exclude struct and array types.

llvm-svn: 51459
 2008-05-23 00:17:26 +00:00
Gabor Greif
e1f6e4b21d API change for {BinaryOperator|CmpInst|CastInst}::create*() --> Create. Legacy interfaces will be in place for some time. (Merge from use-diet branch.) 
llvm-svn: 51200
 2008-05-16 19:29:10 +00:00
Gabor Greif
697e94cc22 Fix a bunch of 80col violations that arose from the Create API change. Tweak makefile targets to find these better. 
llvm-svn: 51143
 2008-05-15 10:04:30 +00:00
Dan Gohman
d78c400b5b Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
 2008-05-13 00:00:25 +00:00
Chris Lattner
67ca6f6347 When SRoA'ing a global variable, make sure the new globals get the 
appropriate alignment.  This fixes a miscompilation of 252.eon on
x86-64 (rdar://5891920).

Bill, please pull this into Tak.

llvm-svn: 50308
 2008-04-26 07:40:11 +00:00
Gabor Greif
e9ecc68d8f API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277
 2008-04-06 20:25:17 +00:00
Dan Gohman
9988569af8 Don't include <map> in Pass.h, which doesn't need it. This requires 
adding <map> to many files that actually do need it.

llvm-svn: 48667
 2008-03-21 23:51:57 +00:00
Chris Lattner
8a923e7c28 Reimplement the parameter attributes support, phase #1. hilights: 
1. There is now a "PAListPtr" class, which is a smart pointer around
   the underlying uniqued parameter attribute list object, and manages
   its refcount.  It is now impossible to mess up the refcount.
2. PAListPtr is now the main interface to the underlying object, and
   the underlying object is now completely opaque.
3. Implementation details like SmallVector and FoldingSet are now no
   longer part of the interface.
4. You can create a PAListPtr with an arbitrary sequence of
   ParamAttrsWithIndex's, no need to make a SmallVector of a specific 
   size (you can just use an array or scalar or vector if you wish).
5. All the client code that had to check for a null pointer before
   dereferencing the pointer is simplified to just access the 
   PAListPtr directly.
6. The interfaces for adding attrs to a list and removing them is a
   bit simpler.

Phase #2 will rename some stuff (e.g. PAListPtr) and do other less 
invasive changes.

llvm-svn: 48289
 2008-03-12 17:45:29 +00:00
Dale Johannesen
09f410b6d7 Split ParameterAttributes.h, putting the complicated 
stuff into ParamAttrsList.h.  Per feedback from
ParamAttrs changes.

llvm-svn: 47504
 2008-02-22 22:17:59 +00:00
Anton Korobeynikov
1bfd121321 Make Transforms to be 4.3 warnings-clean 
llvm-svn: 47371
 2008-02-20 11:26:25 +00:00
Duncan Sands
85fab3a3ad Simplify caller updating using a CallSite, as 
requested by Chris.  While there, do the same
for an existing function committed by someone
called "lattner" :)

llvm-svn: 47273
 2008-02-18 17:32:13 +00:00
Duncan Sands
573b3f89e4 Remove any 'nest' parameter attributes if the function 
is not passed as an argument to a trampoline intrinsic.

llvm-svn: 47220
 2008-02-16 20:56:04 +00:00
Chris Lattner
ade0abb498 Don't let globalopt hack on volatile loads or stores. 
llvm-svn: 46523
 2008-01-29 19:01:37 +00:00
Chris Lattner
26fe7ebc03 Fix the miscompilation of MiBench/consumer-lame that was exposed by Evan's 
byval work.  This miscompilation is due to the program indexing an array out
of range and us doing a transformation that broke this.

llvm-svn: 45949
 2008-01-14 02:09:12 +00:00
Chris Lattner
9a6db18b04 The isNotSuitableForSRA property is now dead, don't compute it. 
llvm-svn: 45948
 2008-01-14 01:32:52 +00:00
Chris Lattner
ab0537258f Change SRAGlobal to not depend on isNotSuitableForSRA, which makes it very 
difficult to understand the invariants.

llvm-svn: 45947
 2008-01-14 01:31:05 +00:00
Chris Lattner
20bbac3435 Make the 'shrink global to bool' optimization more self contained, and thus 
easier to show that its safe.  No functionality change.

llvm-svn: 45946
 2008-01-14 01:17:44 +00:00
Chris Lattner
bdd6acfb59 Fix PR1896 
llvm-svn: 45568
 2008-01-04 05:04:53 +00:00
Chris Lattner
f3ebc3f3d2 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Christopher Lamb
edf0788758 Change the PointerType api for creating pointer types. The old functionality of PointerType::get() has become PointerType::getUnqual(), which returns a pointer in the generic address space. The new prototype of PointerType::get() requires both a type and an address space. 
llvm-svn: 45082
 2007-12-17 01:12:55 +00:00