[llvm] [PGO] Instrument modules with at least a single function definition (PR #93421)

[Teresa Johnson via llvm-commits]

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+; RUN: opt < %s -passes=pgo-instr-gen -S | FileCheck %s --check-prefix=GEN-COMDAT
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teresajohnson wrote:

How does this test behave different than the current status quo?

https://github.com/llvm/llvm-project/pull/93421