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use a SUB instruction instead of an ADD, because -128 can be encoded in an 8-bit signed immediate field, while +128 can't be. This avoids the need for a 32-bit immediate field in this case. A similar optimization applies to 64-bit adds with 0x80000000, with the 32-bit signed immediate field. To support this, teach tablegen how to handle 64-bit constants. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57663 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
2003-08-03-PassCode.td | ||
2006-09-18-LargeInt.td | ||
AnonDefinitionOnDemand.td | ||
BitsInitOverflow.td | ||
CStyleComment.td | ||
DagDefSubst.ll | ||
DagIntSubst.ll | ||
dg.exp | ||
ForwardRef.td | ||
GeneralList.td | ||
Include.inc | ||
Include.td | ||
IntBitInit.td | ||
LazyChange.td | ||
ListConversion.td | ||
ListSlices.td | ||
MultiClass.td | ||
nested-comment.td | ||
strconcat.td | ||
SuperSubclassSameName.td | ||
TargetInstrInfo.td | ||
TemplateArgRename.td | ||
Tree.td | ||
TreeNames.td | ||
UnterminatedComment.td |