Chris Lattner ee4ea92358 Use the new TargetLowering::ComputeNumSignBits method to eliminate ... sign_extend_inreg operations. Though ComputeNumSignBits is still rudimentary, this is enough to compile this: short test(short X, short x) { int Y = X+x; return (Y >> 1); } short test2(short X, short x) { int Y = (short)(X+x); return Y >> 1; } into: _test: add r2, r3, r4 srawi r3, r2, 1 blr _test2: add r2, r3, r4 extsh r2, r2 srawi r3, r2, 1 blr instead of: _test: add r2, r3, r4 srawi r2, r2, 1 extsh r3, r2 blr _test2: add r2, r3, r4 extsh r2, r2 srawi r2, r2, 1 extsh r3, r2 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28146 91177308-0d34-0410-b5e6-96231b3b80d8		2006-05-06 09:30:03 +00:00
..
DAGCombiner.cpp	Use the new TargetLowering::ComputeNumSignBits method to eliminate	2006-05-06 09:30:03 +00:00
LegalizeDAG.cpp	Refactor TargetMachine, pushing handling of TargetData into the target-specific subclasses. This has one caller-visible change: getTargetData() now returns a pointer instead of a reference.	2006-05-03 01:29:57 +00:00
Makefile
ScheduleDAG.cpp	Remove and simplify some more machineinstr/machineoperand stuff.	2006-05-04 18:16:01 +00:00
ScheduleDAGList.cpp	Fix VC++ compilation error.	2006-05-05 01:47:05 +00:00
ScheduleDAGSimple.cpp
SelectionDAG.cpp
SelectionDAGISel.cpp	When inserting casts, be careful of where we put them. We cannot insert	2006-05-06 09:10:37 +00:00
SelectionDAGPrinter.cpp
TargetLowering.cpp	Add some really really simple code for computing sign-bit propagation.	2006-05-06 09:27:13 +00:00