[clang] [llvm] [InstrPGO] Instrument sampling profile based cold function (PR #109837)

[Ellis Hoag via cfe-commits]

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+// Test -fprofile-generate-cold-function-coverage 
+// RUN: %clang -O2 -fprofile-generate-cold-function-coverage=/xxx/yyy/ -fprofile-sample-accurate -fprofile-sample-use=%S/Inputs/pgo-cold-func.prof  -S -emit-llvm -o - %s | FileCheck %s
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ellishg wrote:

You can use `split-file` to avoid needing to checkin a separate test file in `Inputs/`.
https://llvm.org/docs/TestingGuide.html#extra-files

https://github.com/llvm/llvm-project/pull/109837