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Author SHA1 Message Date
Chris Lattner
3e9e5b7db4 Rearrange and comment code better. No functionality changes 
llvm-svn: 10808
 2004-01-12 22:07:24 +00:00
Chris Lattner
b4e121c364 Rename ConstantHandling.* -> ConstantFolding.* 
Move a bunch of (now) private stuff from ConstantFolding.h into
ConstantFolding.cpp.

This _finally_ gets us to a place where we have a sane constant folder.  The
rules are:

1. LLVM clients now use ConstantExpr::get* methods to fold constants.  If they
   cannot be folded, a constantexpr is created, so these methods always return
   valid Constant*'s.
2. The implementation of ConstantExpr::get* uses the functions exposed by
   ConstantFolding.h to try to fold constants.  If they cannot be folded,
   they should return a null pointer.
3. The implementation of ConstantFolding can do whatever it wants, and only
   has one client (Constants.cpp)

This cuts down on the wierd dependencies, and eliminates the two interfaces.
The old constanthandling interface was especially bad for clients to use
because almost none of them took the failure condition into consideration,
thus leading to obscure problems.

llvm-svn: 10807
 2004-01-12 21:13:12 +00:00
Chris Lattner
7285258cc0 Remove a whole bunch more ugliness. This is actually getting to the point of 
this whole refactoring: allow constant folding methods to return something
other than predefined classes, allow them to return generic Constant*'s.

llvm-svn: 10806
 2004-01-12 21:02:29 +00:00
Chris Lattner
d757923e11 Move ConstantHandling.h into lib/VMCore and out of include/llvm 
llvm-svn: 10805
 2004-01-12 20:48:11 +00:00
Chris Lattner
f6f9aafee4 Move this file to lib/VMCore 
llvm-svn: 10804
 2004-01-12 20:47:29 +00:00
Chris Lattner
0c243f5c04 Eliminate a lot of out-of-date comments, and all of the wierd overloaded 
operator constant folding stuff.

llvm-svn: 10803
 2004-01-12 20:43:44 +00:00
Chris Lattner
abdd592bb1 Eliminate usage of the wierd overloaded operator constant folders 
llvm-svn: 10802
 2004-01-12 20:41:05 +00:00
Chris Lattner
b420886171 Eliminate ConstantFoldShiftInstruction reference 
llvm-svn: 10801
 2004-01-12 20:40:42 +00:00
Chris Lattner
2ff33e72ba Remove use of ConstantHandling itf 
llvm-svn: 10800
 2004-01-12 20:13:04 +00:00
Chris Lattner
7bfaf8bba8 Clean up #includes 
llvm-svn: 10799
 2004-01-12 19:56:36 +00:00
Chris Lattner
68c5d9e0d6 Fix bug in previous checkin 
llvm-svn: 10798
 2004-01-12 19:47:05 +00:00
Chris Lattner
cf1d9df549 The getShift method is no obsolete 
llvm-svn: 10797
 2004-01-12 19:37:26 +00:00
Chris Lattner
7d2328f69c Eliminate use of ConstantHandling and ConstantExpr::getShift interfaces 
llvm-svn: 10796
 2004-01-12 19:35:11 +00:00
Chris Lattner
f4c2dcbe21 Add header file I accidentally removed in teh shuffle 
llvm-svn: 10795
 2004-01-12 19:15:20 +00:00
Chris Lattner
35771f4fd2 Fix out of date comment, remove use of ConstantExpr::getShift 
llvm-svn: 10794
 2004-01-12 19:12:58 +00:00
Chris Lattner
de401bbd4b Remove use of the ConstantHandling interfaces 
llvm-svn: 10793
 2004-01-12 19:12:50 +00:00
Chris Lattner
47e9056669 Remove use of ConstantExpr::getShift 
llvm-svn: 10792
 2004-01-12 19:10:58 +00:00
Chris Lattner
758109ce2e Don't use ConstantExpr::getShift anymore 
llvm-svn: 10791
 2004-01-12 19:08:43 +00:00
Chris Lattner
52759f5c5e Make ConstantExpr::get work for shifts as well 
llvm-svn: 10790
 2004-01-12 19:04:55 +00:00
Chris Lattner
23da5dbed6 Remove use of ConstantHandling 
llvm-svn: 10789
 2004-01-12 18:35:03 +00:00
Chris Lattner
4db788b6c5 Remove unneeded #include 
llvm-svn: 10788
 2004-01-12 18:33:54 +00:00
Chris Lattner
98a45667fb llvm::ConstantFoldInstruction 
llvm-svn: 10787
 2004-01-12 18:25:56 +00:00
Chris Lattner
28e5347635 Move prototype of llvm::ConstantFoldInstruction 
llvm-svn: 10786
 2004-01-12 18:25:44 +00:00
Chris Lattner
7242f6af5f Move llvm::ConstantFoldInstruction from VMCore to here, next to ConstantFoldTerminator 
llvm-svn: 10785
 2004-01-12 18:25:22 +00:00
Chris Lattner
e6b9c1001b Move llvm::ConstantFoldInstruction from here to Transforms/Utils 
llvm-svn: 10784
 2004-01-12 18:25:03 +00:00
Chris Lattner
a5101c4743 Remove uses of ConstantHandling itf 
llvm-svn: 10783
 2004-01-12 18:12:44 +00:00
Chris Lattner
41ac9c82f9 Eliminate use of ConstantHandling itf 
llvm-svn: 10782
 2004-01-12 18:08:18 +00:00
Chris Lattner
c290310e9f Remove use of ConstantHandling itf 
llvm-svn: 10781
 2004-01-12 18:02:15 +00:00
Chris Lattner
a2612e417c Eliminate use of ConstantHandling itf 
llvm-svn: 10780
 2004-01-12 17:57:32 +00:00
Chris Lattner
5a9246fb56 Use constantexprs for casts. Eliminate use of the ConstantHandling interfaces 
llvm-svn: 10779
 2004-01-12 17:43:40 +00:00
Chris Lattner
8e3cb82d12 Fix fairly severe bug in my last checking where we treated all unfoldable 
constants as being "true" when evaluating branches.  This was introduced
because we now create constantexprs for the constants instead of failing the
fold.

llvm-svn: 10778
 2004-01-12 17:40:36 +00:00
Chris Lattner
91b68d6a5a Eliminate annoying warnings from the tester, hopefully for real this time. 
llvm-svn: 10777
 2004-01-12 16:55:30 +00:00
John Criswell
572ea1a080 Modified the configure script so that it defines BISON as the bison 
binary and YACC as bison -y.

llvm-svn: 10776
 2004-01-12 16:18:21 +00:00
John Criswell
e6439708ea The configure script now defines BISON as the name of the bison program and 
YACC as bison -y.  In this way, we ensure that bison is being used, but
the Makefiles have macros for using bison itself and for getting bison to
act like it is traditional yacc.

llvm-svn: 10774
 2004-01-12 16:14:54 +00:00
Alkis Evlogimenos
44747c570a Output mov %REG = 0 instead of xor %REG, %REG, %REG to clear a 
register so that LiveVariable analysis is not confused.

llvm-svn: 10773
 2004-01-12 07:22:45 +00:00
Chris Lattner
88ea3eff8c Bug fixed 
llvm-svn: 10770
 2004-01-12 05:15:04 +00:00
Chris Lattner
c45c2bdbad Testcase for PR204 
llvm-svn: 10769
 2004-01-12 05:01:48 +00:00
Chris Lattner
6c47632b4d Add support for %llvmgcc 
llvm-svn: 10768
 2004-01-12 05:01:13 +00:00
Chris Lattner
a523d45c39 * Implement minor performance optimization for the getelementptr case 
* Implement SCCP of load instructions, implementing Transforms/SCCP/loadtest.ll
  This allows us to fold expressions like "foo"[2], even if the pointer is only
  a conditional constant.

llvm-svn: 10767
 2004-01-12 04:29:41 +00:00
Chris Lattner
fec681ed7c Test to make sure we can SCCP load instructions 
llvm-svn: 10766
 2004-01-12 04:28:32 +00:00
Chris Lattner
cb0fc1ce41 Do not hack on volatile loads. I'm not sure what the point of a volatile load 
from constant memory is, but lets not take chances.

llvm-svn: 10765
 2004-01-12 04:13:56 +00:00
Chris Lattner
1269b71517 Implement SCCP/phitest.ll 
llvm-svn: 10763
 2004-01-12 03:57:30 +00:00
Chris Lattner
4bfeceb15a New testcase, allow folding of binary operators that use PHI nodes, as long 
as the result of the binary operator is always constant.  This does not require
the PHI itself to be constant though.

llvm-svn: 10762
 2004-01-12 03:57:00 +00:00
Chris Lattner
40c667e0bc Implement Transforms/ScalarRepl/phinodepromote.ll, which is an important 
case that the C/C++ front-end generates.

llvm-svn: 10761
 2004-01-12 01:18:32 +00:00
Chris Lattner
f4af28db0c New testcase 
llvm-svn: 10760
 2004-01-12 01:17:42 +00:00
Chris Lattner
a4f199b80c Implement: Assembler/2004-01-11-getelementptrfolding.llx 
llvm-svn: 10759
 2004-01-11 23:56:33 +00:00
Chris Lattner
68bae4ff19 This isn't really an assembler test. This tests to make sure the 
ConstantExpr::getGetElementPtr method folds two getelementptr instructions
when possible.

llvm-svn: 10758
 2004-01-11 23:56:03 +00:00
Chris Lattner
1e781891a5 Urg, remove testing code. 
llvm-svn: 10757
 2004-01-11 23:30:03 +00:00
Chris Lattner
7fb38d32a0 Fix a regression that I introduced yesterday. :( 
llvm-svn: 10756
 2004-01-11 23:29:26 +00:00
Alkis Evlogimenos
ef7c077e63 Make LiveVariables::HandlePhysRegUse and 
LiveVariables::HandlePhysRegDef private they use information that is
not in memory when LiveVariables finishes the analysis.

Also update the TwoAddressInstructionPass to not use this interface.

llvm-svn: 10755
 2004-01-11 09:18:45 +00:00