[llvm-exegesis] Update doc.
authorClement Courbet <courbet@google.com>
Wed, 28 Oct 2020 07:15:58 +0000 (08:15 +0100)
committerClement Courbet <courbet@google.com>
Wed, 28 Oct 2020 07:42:38 +0000 (08:42 +0100)
commit992da89450d6080db3a23ca3e3df09f1ebecb0af
tree4090f558aab1ca7195b78608f2dd8f2aa58b501d
parentd1b9c0fd1dce19c566008d9b4128551d4116d0c0
[llvm-exegesis] Update doc.

We don't need an external script to scan all opcodes anymore, just use
`-opcode-index=-1`.
llvm/docs/CommandGuide/llvm-exegesis.rst