Chris Lattner 7259df3ab8 implement Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll. ... We used to emit this code for it: _test: li r2, 1 ;; Value tying up a register for the whole loop li r5, 0 LBB_test_1: ; no_exit.2 or r6, r5, r5 li r5, 0 stw r5, 0(r3) addi r5, r6, 1 addi r3, r3, 4 add r7, r2, r5 ;; should be addi r7, r5, 1 cmpwi cr0, r7, 701 blt cr0, LBB_test_1 ; no_exit.2 LBB_test_2: ; loopexit.2.loopexit addi r2, r6, 2 stw r2, 0(r4) blr now we emit this: _test: li r2, 0 LBB_test_1: ; no_exit.2 or r5, r2, r2 li r2, 0 stw r2, 0(r3) addi r3, r3, 4 addi r2, r5, 1 addi r6, r5, 2 ;; whoa, fold those adds! cmpwi cr0, r6, 701 blt cr0, LBB_test_1 ; no_exit.2 LBB_test_2: ; loopexit.2.loopexit addi r2, r5, 2 stw r2, 0(r4) blr more improvement coming. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23306 91177308-0d34-0410-b5e6-96231b3b80d8		2005-09-10 01:18:45 +00:00
..
ADCE.cpp	preserve calling conventions when hacking on code	2005-05-14 12:25:32 +00:00
BasicBlockPlacement.cpp
CondPropagate.cpp	Fix a fixme in CondPropagate.cpp by moving a PhiNode optimization into	2005-08-04 23:24:19 +00:00
ConstantProp.cpp
CorrelatedExprs.cpp
DCE.cpp	clean up and modernize this pass.	2005-05-08 18:45:26 +00:00
DeadStoreElimination.cpp
GCSE.cpp
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	implement Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll.	2005-09-10 01:18:45 +00:00
LoopUnroll.cpp
LoopUnswitch.cpp
LowerConstantExprs.cpp
LowerGC.cpp
LowerPacked.cpp
Makefile
PRE.cpp
Reassociate.cpp	Fix a problem that Dan Berlin noticed, where reassociation would not succeed	2005-09-02 07:07:58 +00:00
ScalarReplAggregates.cpp
SCCP.cpp
SimplifyCFG.cpp
TailDuplication.cpp
TailRecursionElimination.cpp	Use the new 'moveBefore' method to simplify some code. Really, which is	2005-08-08 19:11:57 +00:00