[NFC][llvm-exegesis] Improve `getOpcodesOrDie()`
authorRoman Lebedev <lebedev.ri@gmail.com>
Sun, 18 Dec 2022 16:54:42 +0000 (19:54 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Sun, 18 Dec 2022 17:07:02 +0000 (20:07 +0300)
commit3ebfc88637bc34dc6ae292057203b31133b376c6
tree3494a75ae585b0461fa4507df88af547dd24eb7e
parentf95ddf0ee7377f6677461b791199c6ffdb489027
[NFC][llvm-exegesis] Improve `getOpcodesOrDie()`

We already have opcode name -> opcode index map, use it.
Reserve memory where appropriate.
llvm/tools/llvm-exegesis/llvm-exegesis.cpp