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Author SHA1 Message Date
Chris Lattner
eab20b58b1 Rearrange and comment code better. No functionality changes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10808 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 22:07:24 +00:00
Chris Lattner
cbfd406541 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10807 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 21:13:12 +00:00
Chris Lattner
8b0f0cb908 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10806 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 21:02:29 +00:00
Chris Lattner
6b7b91ab03 Move ConstantHandling.h into lib/VMCore and out of include/llvm 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10805 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 20:48:11 +00:00
Chris Lattner
302753863d Move this file to lib/VMCore 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10804 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 20:47:29 +00:00
Chris Lattner
731ba7f032 Eliminate a lot of out-of-date comments, and all of the wierd overloaded 
operator constant folding stuff.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10803 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 20:43:44 +00:00
Chris Lattner
4a0ecc8c0c Eliminate usage of the wierd overloaded operator constant folders 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10802 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 20:41:05 +00:00
Chris Lattner
d4403b4c3a Eliminate ConstantFoldShiftInstruction reference 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10801 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 20:40:42 +00:00
Chris Lattner
67bb7603ea Remove use of ConstantHandling itf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10800 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 20:13:04 +00:00
Chris Lattner
7822c2ae07 Clean up #includes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10799 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:56:36 +00:00
Chris Lattner
76f7fe25d9 Fix bug in previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10798 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:47:05 +00:00
Chris Lattner
7e208904ae The getShift method is no obsolete 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10797 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:37:26 +00:00
Chris Lattner
7c4049c5a0 Eliminate use of ConstantHandling and ConstantExpr::getShift interfaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10796 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:35:11 +00:00
Chris Lattner
b6ac8bc586 Add header file I accidentally removed in teh shuffle 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10795 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:15:20 +00:00
Chris Lattner
69b9e892b6 Fix out of date comment, remove use of ConstantExpr::getShift 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10794 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:12:58 +00:00
Chris Lattner
5585b335e5 Remove use of the ConstantHandling interfaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10793 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:12:50 +00:00
Chris Lattner
c6646ebdb9 Remove use of ConstantExpr::getShift 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10792 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:10:58 +00:00
Chris Lattner
b16689b647 Don't use ConstantExpr::getShift anymore 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10791 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:08:43 +00:00
Chris Lattner
3edd3979e1 Make ConstantExpr::get work for shifts as well 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10790 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 19:04:55 +00:00
Chris Lattner
81ebc30089 Remove use of ConstantHandling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10789 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:35:03 +00:00
Chris Lattner
e5d4f1b9e7 Remove unneeded #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10788 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:33:54 +00:00
Chris Lattner
77ab3f1c89 llvm::ConstantFoldInstruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10787 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:25:56 +00:00
Chris Lattner
c4a1509829 Move prototype of llvm::ConstantFoldInstruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10786 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:25:44 +00:00
Chris Lattner
8f90b005d6 Move llvm::ConstantFoldInstruction from VMCore to here, next to ConstantFoldTerminator 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10785 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:25:22 +00:00
Chris Lattner
28aabc34f7 Move llvm::ConstantFoldInstruction from here to Transforms/Utils 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10784 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:25:03 +00:00
Chris Lattner
ccd3a878d0 Remove uses of ConstantHandling itf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10783 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:12:44 +00:00
Chris Lattner
d4d4ab58ef Eliminate use of ConstantHandling itf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10782 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:08:18 +00:00
Chris Lattner
e9028638bf Remove use of ConstantHandling itf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10781 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 18:02:15 +00:00
Chris Lattner
6eb88d44c9 Eliminate use of ConstantHandling itf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10780 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 17:57:32 +00:00
Chris Lattner
b7a5d3edee Use constantexprs for casts. Eliminate use of the ConstantHandling interfaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10779 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 17:43:40 +00:00
Chris Lattner
84831642e4 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10778 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 17:40:36 +00:00
Chris Lattner
d56147dc72 Eliminate annoying warnings from the tester, hopefully for real this time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10777 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 16:55:30 +00:00
John Criswell
12e9b4f1e5 Modified the configure script so that it defines BISON as the bison 
binary and YACC as bison -y.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10776 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 16:18:21 +00:00
John Criswell
b8b80c455f 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10774 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 16:14:54 +00:00
Alkis Evlogimenos
f998a7e671 Output mov %REG = 0 instead of xor %REG, %REG, %REG to clear a 
register so that LiveVariable analysis is not confused.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10773 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 07:22:45 +00:00
Chris Lattner
c43f91fb49 Bug fixed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10770 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 05:15:04 +00:00
Chris Lattner
20cd43b2f6 Testcase for PR204 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10769 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 05:01:48 +00:00
Chris Lattner
e845b1aa79 Add support for %llvmgcc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10768 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 05:01:13 +00:00
Chris Lattner
c6a4d6a066 * 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10767 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 04:29:41 +00:00
Chris Lattner
debcbd0a46 Test to make sure we can SCCP load instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10766 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 04:28:32 +00:00
Chris Lattner
5f16a13896 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10765 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 04:13:56 +00:00
Chris Lattner
1daee8b010 Implement SCCP/phitest.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10763 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 03:57:30 +00:00
Chris Lattner
ff2ab4db20 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10762 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 03:57:00 +00:00
Chris Lattner
2d11f167e6 Implement Transforms/ScalarRepl/phinodepromote.ll, which is an important 
case that the C/C++ front-end generates.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10761 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 01:18:32 +00:00
Chris Lattner
33a79d73bd New testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10760 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-12 01:17:42 +00:00
Chris Lattner
952454dbff Implement: Assembler/2004-01-11-getelementptrfolding.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10759 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-11 23:56:33 +00:00
Chris Lattner
c9f75b5700 This isn't really an assembler test. This tests to make sure the 
ConstantExpr::getGetElementPtr method folds two getelementptr instructions
when possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10758 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-11 23:56:03 +00:00
Chris Lattner
92fa44c1cf Urg, remove testing code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10757 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-11 23:30:03 +00:00
Chris Lattner
9380297bc0 Fix a regression that I introduced yesterday. :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10756 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-11 23:29:26 +00:00
Alkis Evlogimenos
b08bdc4a16 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10755 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-11 09:18:45 +00:00