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87 Commits

Author SHA1 Message Date
Matthijs Kooijman
dd32cb58b5 Learn IPConstProp to propagate arguments that are directly returned. Strictly 
speaking these are not constant values. However, when a function always returns
one of its arguments, then from the point of view of each caller the return
value is constant (or at least a known value) and can be replaced.

llvm-svn: 52397
 2008-06-17 12:20:24 +00:00
Matthijs Kooijman
f0adaf34a1 Learn IPConstProp to look at individual return values and propagate them 
individually.

Also learn IPConstProp how returning first class aggregates work, in addition
to old style multiple return instructions.

Modify the return-constants testscase to confirm this behaviour.

llvm-svn: 52396
 2008-06-17 12:02:52 +00:00
Chris Lattner
7864575654 Fix PR2411, where ip constant prop would propagate the 
result of a weak function.

llvm-svn: 52137
 2008-06-09 07:58:07 +00:00
Dan Gohman
bab18cae46 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
bc79442313 simplify code for propagation of constant arguments into 
callees.

llvm-svn: 50142
 2008-04-23 06:16:27 +00:00
Chris Lattner
408b51d214 Fix a number of bugs in ipconstantprop, simplify the code, fit in 80 cols, 
fix read after free bug (PR2238).

llvm-svn: 50141
 2008-04-23 05:59:23 +00:00
Devang Patel
192124d0e6 Incorporate feedback. 
- Fix loop nest.
- Use RetVals.size()
- Check for null return value.

llvm-svn: 48605
 2008-03-20 18:30:32 +00:00
Devang Patel
54b2c77a4e Handle multiple ret values. 
llvm-svn: 48254
 2008-03-11 22:24:29 +00:00
Anton Korobeynikov
fd6b669c80 Make Transforms to be 4.3 warnings-clean 
llvm-svn: 47371
 2008-02-20 11:26:25 +00:00
Chris Lattner
ad9a6ccb83 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Nick Lewycky
c2306ff5b4 Fix typo in comment. 
llvm-svn: 36873
 2007-05-06 13:37:16 +00:00
Devang Patel
cd45427a87 Drop 'const' 
llvm-svn: 36662
 2007-05-03 01:11:54 +00:00
Devang Patel
8ee9065162 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
 2007-05-02 21:39:20 +00:00
Devang Patel
38a66bc82e Do not use typeinfo to identify pass in pass manager. 
llvm-svn: 36632
 2007-05-01 21:15:47 +00:00
Reid Spencer
8749d297f5 Apply the VISIBILITY_HIDDEN field to the remaining anonymous classes in 
the Transforms library. This reduces debug library size by 132 KB, debug
binary size by 376 KB, and reduces link time for llvm tools slightly.

llvm-svn: 33939
 2007-02-05 23:32:05 +00:00
Reid Spencer
19af04a142 For PR1136: Rename GlobalVariable::isExternal as isDeclaration to avoid 
confusion with external linkage types.

llvm-svn: 33663
 2007-01-30 20:08:39 +00:00
Chris Lattner
44723daefa Eliminate static ctors due to Statistic objects 
llvm-svn: 32693
 2006-12-19 22:09:18 +00:00
Chris Lattner
a531ce882e Detemplatize the Statistic class. The only type it is instantiated with 
is 'unsigned'.

llvm-svn: 32279
 2006-12-06 17:46:33 +00:00
Chris Lattner
a39dcb5377 eliminate RegisterOpt. It does the same thing as RegisterPass. 
llvm-svn: 29925
 2006-08-27 22:42:52 +00:00
Misha Brukman
53e199440e Remove trailing whitespace 
llvm-svn: 21427
 2005-04-21 23:48:37 +00:00
Chris Lattner
4b688a1c70 This mega patch converts us from using Function::a{iterator|begin|end} to 
using Function::arg_{iterator|begin|end}.  Likewise Module::g* -> Module::global_*.

This patch is contributed by Gabor Greif, thanks!

llvm-svn: 20597
 2005-03-15 04:54:21 +00:00
Chris Lattner
59ce936426 Only cound if we actually made a change. 
llvm-svn: 18800
 2004-12-11 17:00:14 +00:00
Chris Lattner
d6d9a04344 Remove note to self 
llvm-svn: 17734
 2004-11-14 06:57:47 +00:00
Chris Lattner
363e78c357 If a function always returns a constant, replace all calls sites with that 
constant value.  This makes the return value dead and allows for
simplification in the caller.

This implements IPConstantProp/return-constant.ll

This triggers several dozen times throughout SPEC.

llvm-svn: 17730
 2004-11-14 06:10:11 +00:00
Chris Lattner
1a469385bd Actually, leave the check in. This prevents us from counting dead arguments 
as IPCP opportunities.

llvm-svn: 17680
 2004-11-11 07:47:54 +00:00
Chris Lattner
dba9c2b0ef Fix bug: IPConstantProp/deadarg.ll 
llvm-svn: 17679
 2004-11-11 07:46:29 +00:00
Chris Lattner
d920b5b770 Make IP Constant prop more aggressive about handling self recursive calls. 
This implements IPConstantProp/recursion.ll

llvm-svn: 17666
 2004-11-10 19:43:59 +00:00
Chris Lattner
b214a04a16 Do not let dead constant expressions hanging off of functions prevent IPCP. 
This allows to elimination of a bunch of global pool descriptor args from
programs being pool allocated (and is also generally useful!)

llvm-svn: 17657
 2004-11-09 20:47:30 +00:00
Chris Lattner
43c0372c0b 'Pass' should now not be derived from by clients. Instead, they should derive 
from ModulePass.  Instead of implementing Pass::run, then should implement
ModulePass::runOnModule.

llvm-svn: 16436
 2004-09-20 04:48:05 +00:00
Reid Spencer
c4abcbefb1 Changes For Bug 352 
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.

llvm-svn: 16137
 2004-09-01 22:55:40 +00:00
Reid Spencer
90795f0825 Avoid an unnecessary isa<Constant>. 
llvm-svn: 14963
 2004-07-18 08:31:18 +00:00
Reid Spencer
51149979ce bug 122: 
- Minimize redundant isa<GlobalValue> usage

llvm-svn: 14948
 2004-07-18 00:32:14 +00:00
Chris Lattner
9ae9c45d43 Finegrainify namespacification 
llvm-svn: 10138
 2003-11-21 21:54:22 +00:00
Brian Gaeke
d25f86d683 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
Chris Lattner
bbca4bb7a6 Propagating constants to arguments can make other arguments constant. For now 
do something dumb, and inefficient, but more complete.

llvm-svn: 9542
 2003-10-27 21:09:00 +00:00
Chris Lattner
0683439f74 We might as well strip off any CPRs before propagation 
llvm-svn: 9437
 2003-10-23 18:49:23 +00:00
Chris Lattner
ab282af103 Check in initial version of ipcp 
llvm-svn: 9423
 2003-10-23 16:52:27 +00:00