Chris Lattner 5d461d20ae Implement a fixme. The helps loops that have induction variables of different ... types in them. Instead of creating an induction variable for all types, it creates a single induction variable and casts to the other sizes. This generates this code: no_exit: ; preds = %entry, %no_exit %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ] ; <uint> [#uses=4] *** %j.0.0 = cast uint %indvar to short ; <short> [#uses=1] %indvar = cast uint %indvar to int ; <int> [#uses=1] %tmp.7 = getelementptr short* %P, uint %indvar ; <short*> [#uses=1] store short %j.0.0, short* %tmp.7 %inc.0 = add int %indvar, 1 ; <int> [#uses=2] %tmp.2 = setlt int %inc.0, %N ; <bool> [#uses=1] %indvar.next = add uint %indvar, 1 ; <uint> [#uses=1] br bool %tmp.2, label %no_exit, label %loopexit instead of: no_exit: ; preds = %entry, %no_exit %indvar = phi ushort [ %indvar.next, %no_exit ], [ 0, %entry ] ; <ushort> [#uses=2] *** %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ] ; <uint> [#uses=3] %indvar = cast uint %indvar to int ; <int> [#uses=1] %indvar = cast ushort %indvar to short ; <short> [#uses=1] %tmp.7 = getelementptr short* %P, uint %indvar ; <short*> [#uses=1] store short %indvar, short* %tmp.7 %inc.0 = add int %indvar, 1 ; <int> [#uses=2] %tmp.2 = setlt int %inc.0, %N ; <bool> [#uses=1] %indvar.next = add uint %indvar, 1 *** %indvar.next = add ushort %indvar, 1 br bool %tmp.2, label %no_exit, label %loopexit This is an improvement in register pressure, but probably doesn't happen that often. The more important fix will be to get rid of the redundant add. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13101 91177308-0d34-0410-b5e6-96231b3b80d8		2004-04-21 22:22:01 +00:00
..
ADCE.cpp	Simplify code a bit, and fix a bug that was breaking perlbmk	2004-04-10 18:06:21 +00:00
BasicBlockPlacement.cpp	Remove obsolete comment. Unreachable blocks will automatically be left at the	2004-02-11 05:20:50 +00:00
ConstantProp.cpp	Constant propagation should remove the dead instructions	2004-04-13 19:28:20 +00:00
CorrelatedExprs.cpp	Remove use of the ConstantHandling interfaces	2004-01-12 19:12:50 +00:00
DCE.cpp	Finegrainify namespacification	2004-01-09 06:02:20 +00:00
DecomposeMultiDimRefs.cpp	Finegrainify namespacification	2004-01-09 06:02:20 +00:00
GCSE.cpp	Add support for removing invoke instructions	2004-04-12 05:15:13 +00:00
IndVarSimplify.cpp	Implement a fixme. The helps loops that have induction variables of different	2004-04-21 22:22:01 +00:00
InstructionCombining.cpp	Fix a HUGE pessimization on X86. The indvars pass was taking this	2004-04-17 18:16:10 +00:00
LICM.cpp	Move isLoopInvariant to the Loop class	2004-04-18 22:46:08 +00:00
LoopUnroll.cpp	Fix PR325	2004-04-20 20:26:03 +00:00
LoopUnswitch.cpp	Initial checkin of a simple loop unswitching pass. It still needs work,	2004-04-19 18:07:02 +00:00
Makefile	Added LLVM copyright notice to Makefiles.	2003-10-20 22:26:57 +00:00
PiNodeInsertion.cpp	Finegrainify namespacification	2004-01-09 06:02:20 +00:00
PRE.cpp	Finegrainify namespacification	2004-01-09 06:02:20 +00:00
Reassociate.cpp	Finegrainify namespacification	2004-01-09 06:02:20 +00:00
ScalarReplAggregates.cpp	Support getelementptr instructions which use uint's to index into structure	2004-04-05 01:30:19 +00:00
SCCP.cpp	Add SCCP support for constant folding calls, implementing:	2004-04-13 19:43:54 +00:00
SimplifyCFG.cpp	Finegrainify namespacification	2004-01-09 06:02:20 +00:00
SymbolStripping.cpp	Update obsolete comments	2004-01-10 21:36:49 +00:00
TailDuplication.cpp	Make the tail duplication threshold accessible from the command line instead of hardcoded	2004-04-18 00:52:43 +00:00
TailRecursionElimination.cpp	Adjust to the new BasicBlock ctor, which requires a function parameter	2004-02-04 03:58:28 +00:00