[DO NOT MERGE] what if we don't allow unused filecheck prefixes?

[jieyouxu]

I'm fairly sure this is load-bearing, checking to identify examples where this is necessary.

r? @ghost

try-job: aarch64-gnu
try-job: aarch64-apple
try-job: test-various
try-job: armhf-gnu
try-job: i686-mingw-1
try-job: i686-msvc-1

[jieyouxu]

@bors try

[bors]

⌛ Trying commit 810d509 with merge 9862d24...

[rust-log-analyzer]

The job x86_64-gnu-llvm-18 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

#22 exporting to docker image format
#22 sending tarball 28.1s done
#22 DONE 33.6s
##[endgroup]
Setting extra environment values for docker:  --env ENABLE_GCC_CODEGEN=1 --env GCC_EXEC_PREFIX=/usr/lib/gcc/
[CI_JOB_NAME=x86_64-gnu-llvm-18]
debug: `DISABLE_CI_RUSTC_IF_INCOMPATIBLE` configured.
---
sccache: Starting the server...
##[group]Configure the build
configure: processing command line
configure: 
configure: build.configure-args := ['--build=x86_64-unknown-linux-gnu', '--llvm-root=/usr/lib/llvm-18', '--enable-llvm-link-shared', '--set', 'rust.randomize-layout=true', '--set', 'rust.thin-lto-import-instr-limit=10', '--enable-verbose-configure', '--enable-sccache', '--disable-manage-submodules', '--enable-locked-deps', '--enable-cargo-native-static', '--set', 'rust.codegen-units-std=1', '--set', 'dist.compression-profile=balanced', '--dist-compression-formats=xz', '--set', 'rust.lld=false', '--disable-dist-src', '--release-channel=nightly', '--enable-debug-assertions', '--enable-overflow-checks', '--enable-llvm-assertions', '--set', 'rust.verify-llvm-ir', '--set', 'rust.codegen-backends=llvm,cranelift,gcc', '--set', 'llvm.static-libstdcpp', '--enable-new-symbol-mangling']
configure: target.x86_64-unknown-linux-gnu.llvm-config := /usr/lib/llvm-18/bin/llvm-config
configure: llvm.link-shared     := True
configure: rust.randomize-layout := True
configure: rust.thin-lto-import-instr-limit := 10
---
failures:

---- [mir-opt] tests/mir-opt/optimize_none.rs#NO-OPT stdout ----

error in revision `NO-OPT`: verification with 'FileCheck' failed
status: exit status: 2
command: "/usr/lib/llvm-18/bin/FileCheck" "--input-file" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/mir-opt/optimize_none.NO-OPT/optimize_none.mir" "/checkout/tests/mir-opt/optimize_none.rs" "--check-prefix=CHECK" "--check-prefix" "NO-OPT" "--dump-input-context" "100"
--- stderr -------------------------------
--- stderr -------------------------------
error: no check strings found with prefix 'NO-OPT:'


---- [mir-opt] tests/mir-opt/optimize_none.rs#SPEED-OPT stdout ----


error in revision `SPEED-OPT`: verification with 'FileCheck' failed
status: exit status: 2
command: "/usr/lib/llvm-18/bin/FileCheck" "--input-file" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/mir-opt/optimize_none.SPEED-OPT/optimize_none.mir" "/checkout/tests/mir-opt/optimize_none.rs" "--check-prefix=CHECK" "--check-prefix" "SPEED-OPT" "--dump-input-context" "100"
--- stderr -------------------------------
--- stderr -------------------------------
error: no check strings found with prefix 'SPEED-OPT:'



failures:

[jieyouxu]

Yeah, as expected. They declare a revision but isn't actually used as filecheck annotations.

[rust-log-analyzer]

The job aarch64-apple failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

Updating files:  98% (50983/52023)
Updating files:  99% (51503/52023)
Updating files: 100% (52023/52023)
Updating files: 100% (52023/52023), done.
Switched to a new branch 'try'
branch 'try' set up to track 'origin/try'.
[command]/opt/homebrew/bin/git log -1 --format=%H
9862d245c00a164f6673ffba98150c16512972ac
##[group]Run src/ci/scripts/setup-environment.sh
src/ci/scripts/setup-environment.sh
---
file:.git/config remote.origin.url=https://github.com/rust-lang-ci/rust
file:.git/config remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
file:.git/config gc.auto=0
file:.git/config http.https://github.com/.extraheader=AUTHORIZATION: basic ***
file:.git/config branch.try.remote=origin
file:.git/config branch.try.merge=refs/heads/try
file:.git/config remote.upstream.fetch=+refs/heads/*:refs/remotes/upstream/*
file:.git/config submodule.library/backtrace.active=true
file:.git/config submodule.library/backtrace.url=https://github.com/rust-lang/backtrace-rs.git
file:.git/config submodule.library/stdarch.active=true
---
failures:

---- [mir-opt] tests/mir-opt/optimize_none.rs#SPEED-OPT stdout ----

error in revision `SPEED-OPT`: verification with 'FileCheck' failed
status: exit status: 2
command: "/Users/runner/work/rust/rust/build/aarch64-apple-darwin/ci-llvm/bin/FileCheck" "--input-file" "/Users/runner/work/rust/rust/build/aarch64-apple-darwin/test/mir-opt/optimize_none.SPEED-OPT/optimize_none.mir" "/Users/runner/work/rust/rust/tests/mir-opt/optimize_none.rs" "--check-prefix=CHECK" "--check-prefix" "SPEED-OPT" "--dump-input-context" "100"
--- stderr -------------------------------
--- stderr -------------------------------
error: no check strings found with prefix 'SPEED-OPT:'


---- [mir-opt] tests/mir-opt/optimize_none.rs#NO-OPT stdout ----


error in revision `NO-OPT`: verification with 'FileCheck' failed
status: exit status: 2
command: "/Users/runner/work/rust/rust/build/aarch64-apple-darwin/ci-llvm/bin/FileCheck" "--input-file" "/Users/runner/work/rust/rust/build/aarch64-apple-darwin/test/mir-opt/optimize_none.NO-OPT/optimize_none.mir" "/Users/runner/work/rust/rust/tests/mir-opt/optimize_none.rs" "--check-prefix=CHECK" "--check-prefix" "NO-OPT" "--dump-input-context" "100"
--- stderr -------------------------------
--- stderr -------------------------------
error: no check strings found with prefix 'NO-OPT:'



failures: