[lld] [lld][WebAssembly] Drop llvm_cov sections when llvm_prf segments are discarded (PR #172023)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 3750 tests passed
* 69 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### lld
<details>
<summary>lld.wasm/malformed-prf.ll</summary>

```
Exit Code: 127

Command Output (stdout):
--
# RUN: at line 1
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -filetype=obj /home/gha/actions-runner/_work/llvm-project/llvm-project/lld/test/wasm/malformed-prf.ll -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.instr-prof.o
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -filetype=obj /home/gha/actions-runner/_work/llvm-project/llvm-project/lld/test/wasm/malformed-prf.ll -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.instr-prof.o
# note: command had no output on stdout or stderr
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -filetype=obj /home/gha/actions-runner/_work/llvm-project/llvm-project/lld/test/wasm/Inputs/malformed-prf1.ll -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf1.o
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -filetype=obj /home/gha/actions-runner/_work/llvm-project/llvm-project/lld/test/wasm/Inputs/malformed-prf1.ll -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf1.o
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -filetype=obj /home/gha/actions-runner/_work/llvm-project/llvm-project/lld/test/wasm/Inputs/malformed-prf2.ll -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf2.o
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -filetype=obj /home/gha/actions-runner/_work/llvm-project/llvm-project/lld/test/wasm/Inputs/malformed-prf2.ll -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf2.o
# note: command had no output on stdout or stderr
# RUN: at line 4
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/wasm-ld -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.wasm /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.instr-prof.o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf1.o --start-lib /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf2.o --end-lib --gc-sections --no-entry
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/wasm-ld -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.wasm /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.instr-prof.o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf1.o --start-lib /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.malformed-prf2.o --end-lib --gc-sections --no-entry
# note: command had no output on stdout or stderr
# RUN: at line 5
llvm-cov export --object /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.wasm --empty-profile
# executed command: llvm-cov export --object /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lld/test/wasm/Output/malformed-prf.ll.tmp.wasm --empty-profile
# .---command stderr------------
# | 'llvm-cov': command not found
# `-----------------------------
# error: command failed with exit status: 127

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/172023