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79590b8edf
llvm-6502/test/Transforms
History
Evan Cheng 79590b8edf Instcombine was transforming: 
%shr = lshr i64 %key, 3
  %0 = load i64* %val, align 8
  %sub = add i64 %0, -1
  %and = and i64 %sub, %shr
  ret i64 %and

to:
  %shr = lshr i64 %key, 3
  %0 = load i64* %val, align 8
  %sub = add i64 %0, 2305843009213693951
  %and = and i64 %sub, %shr
  ret i64 %and

The demanded bit optimization is actually a pessimization because add -1 would
be codegen'ed as a sub 1. Teach the demanded constant shrinking optimization
to check for negated constant to make sure it is actually reducing the width
of the constant.

rdar://11793464


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160101 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-12 01:45:35 +00:00
..
ADCE
ArgumentPromotion Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
BBVectorize Allow BBVectorize to form non-2^n-length vectors. 2012-06-28 05:42:42 +00:00
BlockPlacement
BoundsChecking BoundsChecking: optimize out the check for offset < 0 if size is known to be >= 0 (signed). 2012-07-03 17:30:18 +00:00
BranchFolding
CodeExtractor
CodeGenPrepare
ConstantMerge
ConstProp Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
CorrelatedValuePropagation make LazyValueInfo analyze the default case of switch statements (we know that in the default branch the value cannot be any of the switch cases) 2012-06-28 16:13:37 +00:00
DeadArgElim Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
DeadStoreElimination Teach DeadStoreElimination to eliminate exit-block stores with phi addresses. 2012-05-10 18:57:38 +00:00
EarlyCSE
FunctionAttrs Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
GlobalDCE
GlobalOpt GlobalOpt forgot to handle bitcast when analyzing globals. Found by inspection. 2012-07-02 18:55:39 +00:00
GVN Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
IndVarSimplify Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
Inline Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
InstCombine Instcombine was transforming: 2012-07-12 01:45:35 +00:00
InstSimplify
Internalize
IPConstantProp Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
JumpThreading Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
LCSSA Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
LICM Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
LoopDeletion
LoopIdiom
LoopRotate Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
LoopSimplify Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
LoopStrengthReduce Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
LoopUnroll
LoopUnswitch Convert the uses of '|&' to use '2>&1 |' instead, which works on old 2012-07-02 18:37:59 +00:00
LowerAtomic
LowerExpectIntrinsic
LowerInvoke
LowerSwitch PR1255 related changes (case ranges): 2012-05-24 09:33:20 +00:00
Mem2Reg
MemCpyOpt Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
MergeFunc Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
ObjCARC Fix the objc_autoreleasedReturnValue optimization code to locate 2012-06-25 19:47:37 +00:00
PhaseOrdering
PruneEH Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
Reassociate Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
ScalarRepl Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
SCCP Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
SimplifyCFG Revert "IntRange:" as it appears to be breaking self hosting. 2012-07-02 23:22:21 +00:00
SimplifyLibCalls Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
Sink Enhance the sinking code to handle diamond patterns. Patch by 2012-05-31 08:09:49 +00:00
StripSymbols
TailCallElim Convert the uses of '|&' to use '2>&1 |' instead, which works on old 2012-07-02 18:37:59 +00:00
TailDup Convert the uses of '|&' to use '2>&1 |' instead, which works on old 2012-07-02 18:37:59 +00:00