Chris Lattner c6bae65b49 _test: ... li r2, 0 LBB_test_1: ; no_exit.2 li r5, 0 stw r5, 0(r3) addi r2, r2, 1 addi r3, r3, 4 cmpwi cr0, r2, 701 blt cr0, LBB_test_1 ; no_exit.2 LBB_test_2: ; loopexit.2.loopexit addi r2, r2, 1 stw r2, 0(r4) blr [zion ~/llvm]$ cat > ~/xx Uses of IV's outside of the loop should use hte post-incremented version of the IV, not the preincremented version. This helps many loops (e.g. in sixtrack) which used to generate code like this (this is the code from the dont-hoist-simple-loop-constants.ll testcase): _test: li r2, 0 **** IV starts at 0 LBB_test_1: ; no_exit.2 or r5, r2, r2 **** Copy for loop exit li r2, 0 stw r2, 0(r3) addi r3, r3, 4 addi r2, r5, 1 addi r6, r5, 2 **** IV+2 cmpwi cr0, r6, 701 blt cr0, LBB_test_1 ; no_exit.2 LBB_test_2: ; loopexit.2.loopexit addi r2, r5, 2 **** IV+2 stw r2, 0(r4) blr And now generated code like this: _test: li r2, 1 *** IV starts at 1 LBB_test_1: ; no_exit.2 li r5, 0 stw r5, 0(r3) addi r2, r2, 1 addi r3, r3, 4 cmpwi cr0, r2, 701 *** IV.postinc + 0 blt cr0, LBB_test_1 LBB_test_2: ; loopexit.2.loopexit stw r2, 0(r4) *** IV.postinc + 0 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23313 91177308-0d34-0410-b5e6-96231b3b80d8		2005-09-12 06:04:47 +00:00
..
ADCE.cpp	preserve calling conventions when hacking on code	2005-05-14 12:25:32 +00:00
BasicBlockPlacement.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
CondPropagate.cpp	Fix a fixme in CondPropagate.cpp by moving a PhiNode optimization into	2005-08-04 23:24:19 +00:00
ConstantProp.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
CorrelatedExprs.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
DCE.cpp	clean up and modernize this pass.	2005-05-08 18:45:26 +00:00
DeadStoreElimination.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
GCSE.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
IndVarSimplify.cpp	Allow indvar simplify to canonicalize ANY affine IV, not just affine IVs with	2005-08-10 01:12:06 +00:00
InstructionCombining.cpp	Use the new 'moveBefore' method to simplify some code. Really, which is	2005-08-08 19:11:57 +00:00
LICM.cpp	prevent va_arg from being hoisted from a loop	2005-06-20 13:36:33 +00:00
LoopStrengthReduce.cpp	_test:	2005-09-12 06:04:47 +00:00
LoopUnroll.cpp	Eliminate tabs and trailing spaces	2005-04-23 21:38:35 +00:00
LoopUnswitch.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
LowerConstantExprs.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
LowerGC.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
LowerPacked.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
PRE.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
Reassociate.cpp	Fix a problem that Dan Berlin noticed, where reassociation would not succeed	2005-09-02 07:07:58 +00:00
ScalarReplAggregates.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
SCCP.cpp	Eliminate tabs and trailing spaces	2005-04-23 21:38:35 +00:00
SimplifyCFG.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
TailDuplication.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
TailRecursionElimination.cpp	Use the new 'moveBefore' method to simplify some code. Really, which is	2005-08-08 19:11:57 +00:00