[clang] [llvm] [sancov] add -fsanitize-coverage=trace-pc-entry-exit (PR #185972)

[Jann Horn via cfe-commits]

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+; RUN: opt < %s -passes='module(sancov-module)' -sanitizer-coverage-level=2 -sanitizer-coverage-trace-pc-entry-exit -S | FileCheck %s --check-prefix=CHECK_EE_ONLY
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thejh wrote:

Ack, I've reworked the test to be more thorough and check for these things.

https://github.com/llvm/llvm-project/pull/185972