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Chris Lattner a106725fc5 Land the long talked about "type system rewrite" patch. This 
patch brings numerous advantages to LLVM.  One way to look at it
is through diffstat:
 109 files changed, 3005 insertions(+), 5906 deletions(-)

Removing almost 3K lines of code is a good thing.  Other advantages
include:

1. Value::getType() is a simple load that can be CSE'd, not a mutating
   union-find operation.
2. Types a uniqued and never move once created, defining away PATypeHolder.
3. Structs can be "named" now, and their name is part of the identity that
   uniques them.  This means that the compiler doesn't merge them structurally
   which makes the IR much less confusing.
4. Now that there is no way to get a cycle in a type graph without a named
   struct type, "upreferences" go away.
5. Type refinement is completely gone, which should make LTO much MUCH faster
   in some common cases with C++ code.
6. Types are now generally immutable, so we can use "Type *" instead 
   "const Type *" everywhere.

Downsides of this patch are that it removes some functions from the C API,
so people using those will have to upgrade to (not yet added) new API.  
"LLVM 3.0" is the right time to do this.

There are still some cleanups pending after this, this patch is large enough
as-is.

llvm-svn: 134829
2011-07-09 17:41:24 +00:00
..
2002-03-08-NameCollision2.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-03-08-NameCollision.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-04-07-HexFloatConstants.ll Use opt -S instead of piping bitcode output through llvm-dis. 2009-09-08 22:34:10 +00:00
2002-04-07-InfConstant.ll
2002-04-29-NameBinding.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2002-05-02-InvalidForwardRef.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-07-14-OpaqueType.ll
2002-07-25-QuoteInString.ll
2002-07-25-ReturnPtrFunction.ll Land the long talked about "type system rewrite" patch. This 2011-07-09 17:41:24 +00:00
2002-07-31-SlashInString.ll
2002-08-15-CastAmbiguity.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-08-15-ConstantExprProblem.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-08-15-UnresolvedGlobalReference.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-08-16-ConstExprInlined.ll
2002-08-19-BytecodeReader.ll Fix this test to test what it was originally intended to test. 2009-09-11 18:16:43 +00:00
2002-08-22-DominanceProblem.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-10-08-LargeArrayPerformance.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2002-10-13-ConstantEncodingProblem.ll
2002-12-15-GlobalResolve.ll Land the long talked about "type system rewrite" patch. This 2011-07-09 17:41:24 +00:00
2003-01-30-UnsignedString.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2003-04-15-ConstantInitAssertion.ll Land the long talked about "type system rewrite" patch. This 2011-07-09 17:41:24 +00:00
2003-04-25-UnresolvedGlobalReference.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2003-05-03-BytecodeReaderProblem.ll
2003-05-12-MinIntProblem.ll
2003-05-15-AssemblerProblem.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2003-05-15-SwitchBug.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2003-05-21-ConstantShiftExpr.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2003-05-21-EmptyStructTest.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2003-05-21-MalformedShiftCrash.ll implement .ll and .bc support for nsw/nuw on shl and exact on lshr/ashr. 2011-02-07 16:40:21 +00:00
2003-05-21-MalformedStructCrash.ll Land the long talked about "type system rewrite" patch. This 2011-07-09 17:41:24 +00:00
2003-06-17-InvokeDisassemble.ll
2003-08-20-ConstantExprGEP-Fold.ll fix test to not get a moduleid that matches 'br' 2009-09-11 16:47:41 +00:00
2003-08-21-ConstantExprCast-Fold.ll
2003-11-05-ConstantExprShift.ll
2003-11-11-ImplicitRename.ll
2003-11-12-ConstantExprCast.ll
2003-11-24-SymbolTableCrash.ll
2004-01-11-getelementptrfolding.ll
2004-01-20-MaxLongLong.ll
2004-02-01-NegativeZero.ll
2004-02-27-SelfUseAssertError.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2004-03-07-FunctionAddressAlignment.ll
2004-03-30-UnclosedFunctionCrash.ll
2004-04-04-GetElementPtrIndexTypes.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2004-06-07-VerifierBug.ll
2004-10-22-BCWriterUndefBug.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2004-11-28-InvalidTypeCrash.ll Land the long talked about "type system rewrite" patch. This 2011-07-09 17:41:24 +00:00
2005-01-03-FPConstantDisassembly.ll
2005-01-31-CallingAggregateFunction.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2005-05-05-OpaqueUndefValues.ll
2005-12-21-ZeroInitVector.ll
2006-09-28-CrashOnInvalid.ll
2006-12-09-Cast-To-Bool.ll
2007-01-02-Undefined-Arg-Type.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2007-01-05-Cmp-ConstExpr.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2007-01-16-CrashOnBadCast2.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2007-01-16-CrashOnBadCast.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2007-03-18-InvalidNumberedVar.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2007-03-19-NegValue.ll
2007-04-20-AlignedLoad.ll
2007-04-20-AlignedStore.ll
2007-04-25-AssemblerFoldExternWeak.ll
2007-05-21-Escape.ll
2007-07-19-ParamAttrAmbiguity.ll
2007-08-06-AliasInvalid.ll
2007-09-10-AliasFwdRef.ll
2007-09-29-GC.ll
2007-11-26-AttributeOverload.ll
2007-12-11-AddressSpaces.ll
2008-01-11-VarargAttrs.ll
2008-02-18-IntPointerCrash.ll
2008-07-10-APInt.ll
2008-09-02-FunctionNotes2.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2008-09-02-FunctionNotes.ll
2008-09-29-RetAttr.ll
2008-10-14-QuoteInName.ll
2009-02-01-UnnamedForwardRef.ll
2009-02-28-CastOpc.ll Remove support for parsing the "type i32" syntax for defining a numbered 2011-06-19 00:03:46 +00:00
2009-02-28-StripOpaqueName.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2009-03-24-ZextConstantExpr.ll
2009-04-25-AliasGEP.ll
2009-07-24-ZeroArgGEP.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
2010-02-05-FunctionLocalMetadataBecomesNull.ll Function-local metadata whose operands had been optimized to no longer refer to function-local IR were not getting written by BitcodeWriter; solution is for these metadata to be enumerated just like global metadata. 2010-02-06 01:21:09 +00:00
aggregate-constant-values.ll
aggregate-return-single-value.ll Remove some support for ReturnInsts with multiple operands, and for 2011-04-04 07:44:02 +00:00
align-inst-alloca.ll Define a maximum supported alignment value for load, store, and 2010-07-28 20:12:04 +00:00
align-inst-load.ll Define a maximum supported alignment value for load, store, and 2010-07-28 20:12:04 +00:00
align-inst-store.ll Define a maximum supported alignment value for load, store, and 2010-07-28 20:12:04 +00:00
align-inst.ll Make GlobalValue alignment consistent with load, store, and alloca 2010-07-28 20:56:48 +00:00
alignstack.ll Adjust testcases for msasm -> alignstack. 2009-10-21 23:29:12 +00:00
anon-functions.ll Fix spacing. 2009-09-06 00:00:13 +00:00
AutoUpgradeIntrinsics.ll rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is 2011-06-18 06:05:24 +00:00
bcwrap.ll
comment.ll Reapply: Add type output to llvm-dis annotations. Patch by Yuri! 2011-03-17 19:50:04 +00:00
ConstantExprFold.ll Clean up the usage of evaluateICmpRelation's return value. 2009-09-20 04:27:06 +00:00
ConstantExprFoldCast.ll
dg.exp
extractvalue-invalid-idx.ll Fix PR 4170 by having ExtractValueInst::getIndexedType() reject out-of-bounds indexing. 2010-12-05 20:50:26 +00:00
flags.ll implement .ll and .bc support for nsw/nuw on shl and exact on lshr/ashr. 2011-02-07 16:40:21 +00:00
functionlocal-metadata.ll Fix (and test) function-local metadata that occurs before the instruction that it refers to; fix is to not enumerate operands of function-local metadata until after all instructions have been enumerated 2010-02-04 01:13:08 +00:00
getelementptr_struct.ll
getelementptr.ll Land the long talked about "type system rewrite" patch. This 2011-07-09 17:41:24 +00:00
huge-array.ll
insertextractvalue.ll fix PR4963: folding insertvalue would sometimes turn a packed struct into 2009-09-15 06:28:12 +00:00
insertvalue-invalid-idx.ll Fix PR 4170 by having ExtractValueInst::getIndexedType() reject out-of-bounds indexing. 2010-12-05 20:50:26 +00:00
invalid_cast2.ll Tighten up checking of the validity of casts. (1) The IR parser would 2011-05-18 09:21:57 +00:00
invalid_cast.ll Tighten up checking of the validity of casts. (1) The IR parser would 2011-05-18 09:21:57 +00:00
metadata.ll add newlines at the end of files. 2010-04-07 22:53:17 +00:00
MultipleReturnValueType.ll
named-metadata.ll Add testcase for r133050 which added support for printing and parsing escaped 2011-06-16 17:14:38 +00:00
numbered-values.ll
select.ll Remove obsolete -f flags. 2009-08-25 15:38:29 +00:00
unnamed-addr.ll Move unnamed_addr after the function arguments on Sabre's request. 2011-01-25 19:09:56 +00:00
unnamed.ll Various AsmWriter output cleanups. Use WriteAsOperand instead of 2009-08-13 01:36:44 +00:00
vbool-cmp.ll
vector-cmp.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
vector-select.ll
vector-shift.ll
x86mmx.ll Basic smoke test for new x86mmx type. 2010-09-13 21:01:36 +00:00