[RISCV] Enable PrimaryKeyEarlyOut on RISCVVPseudosTable.
This table is queried in RISCVMCInstLower without knowing
whether the instruction is a vector pseudo. Due to the way the
binary search works, we have to do log2(tablesize) checks just
to determine a non-vector instruction isn't in the table.
Conveniently, all the vector pseudos are pretty tightly
packed within the internal instruction enum. By enabling the
PrimaryKeyEarlyOut, tablegen will emit a check against the
beginning and end of the table before doing the binary search.
This gives a quick early out on the search for the majority
of non-vector instructions.
Differential Revision: https://reviews.llvm.org/D97016
GitOrigin-RevId: cf34559104d3531e98e16ea242b777f18d5f95cf
diff --git a/lib/Target/RISCV/RISCVInstrInfoVPseudos.td b/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
index 4e3a261..20f3740 100644
--- a/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
+++ b/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
@@ -402,6 +402,7 @@
let Fields = [ "Pseudo", "BaseInstr" ];
let PrimaryKey = [ "Pseudo" ];
let PrimaryKeyName = "getPseudoInfo";
+ let PrimaryKeyEarlyOut = true;
}
def RISCVVIntrinsicsTable : GenericTable {
