Fangrui Song 9a24488cb6 [CodeGen] Move fentry-insert, xray-instrumentation and patchable-function before addPreEmitPass() ...

This intention is to move patchable-function before aarch64-branch-targets
(configured in AArch64PassConfig::addPreEmitPass) so that we emit BTI before NOPs
(see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92424).

This also allows addPreEmitPass() passes to know the precise instruction sizes if they want.

Tried x86-64 Debug/Release builds of ccls with -fxray-instrument -fxray-instruction-threshold=1.
No output difference with this commit and the previous commit.

2020-01-19 00:09:46 -08:00

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