Add some const_compare_raw_pointers-related regression tests

[JohnTitor]

Closes #71381
Closes #71382
Closes #71611
Closes #72352

r? @oli-obk, the author of #73398

[rust-highfive]

The job x86_64-gnu-llvm-8 of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

##[section]Starting: Linux x86_64-gnu-llvm-8
##[section]Starting: Initialize job
Agent name: 'Azure Pipelines 8'
Agent machine name: 'fv-az578'
Current agent version: '2.171.1'
##[group]Operating System
16.04.6
LTS
LTS
##[endgroup]
##[group]Virtual Environment
Environment: ubuntu-16.04
Version: 20200621.1
Included Software: https://github.com/actions/virtual-environments/blob/ubuntu16/20200621.1/images/linux/Ubuntu1604-README.md
##[endgroup]
Agent running as: 'vsts'
Prepare build directory.
Set build variables.
Download all required tasks.
Download all required tasks.
Downloading task: Bash (3.171.1)
Checking job knob settings.
   Knob: AgentToolsDirectory = /opt/hostedtoolcache Source: ${AGENT_TOOLSDIRECTORY} 
   Knob: AgentPerflog = /home/vsts/perflog Source: ${VSTS_AGENT_PERFLOG} 
Start tracking orphan processes.
##[section]Finishing: Initialize job
##[section]Starting: Configure Job Name
==============================================================================
---
========================== Starting Command Output ===========================
[command]/bin/bash --noprofile --norc /home/vsts/work/_temp/8ce0c823-d715-43b8-9089-d1edcac78ce0.sh

##[section]Finishing: Disable git automatic line ending conversion
##[section]Starting: Checkout rust-lang/rust@refs/pull/73795/merge to s
Task         : Get sources
Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
Version      : 1.0.0
Author       : Microsoft
---
##[command]git remote add origin https://github.com/rust-lang/rust
##[command]git config gc.auto 0
##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
##[command]git config --get-all http.proxy
##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/73795/merge:refs/remotes/pull/73795/merge
---
 ---> 31fea614d2f3
Step 5/8 : ENV RUST_CONFIGURE_ARGS       --build=x86_64-unknown-linux-gnu       --llvm-root=/usr/lib/llvm-8       --enable-llvm-link-shared       --set rust.thin-lto-import-instr-limit=10
 ---> Using cache
 ---> 4195cadf126d
Step 6/8 : ENV SCRIPT python2.7 ../x.py test --exclude src/tools/tidy &&            python2.7 ../x.py test src/test/mir-opt --pass=build                                   --target=armv5te-unknown-linux-gnueabi &&            python2.7 ../x.py test src/tools/tidy
 ---> 4e90f6b48f05
Step 7/8 : ENV NO_DEBUG_ASSERTIONS=1
 ---> Using cache
 ---> dfa0a356d899
---
Set({"src/librustc_parse_format"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_passes"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_plugin_impl"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_privacy"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_query_system"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_save_analysis"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_serialize"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_session"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_span"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
---
Set({"src/librustc_parse_format"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_passes"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_plugin_impl"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_privacy"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_query_system"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_save_analysis"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_serialize"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_session"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
Set({"src/librustc_span"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
---
   Compiling rustc_parse_format v0.0.0 (/checkout/src/librustc_parse_format)
   Compiling tracing v0.1.15
   Compiling rustc_ast_pretty v0.0.0 (/checkout/src/librustc_ast_pretty)
   Compiling rustc_hir v0.0.0 (/checkout/src/librustc_hir)
   Compiling rustc_query_system v0.0.0 (/checkout/src/librustc_query_system)
   Compiling chalk-engine v0.14.0
   Compiling rustc_hir_pretty v0.0.0 (/checkout/src/librustc_hir_pretty)
   Compiling rustc_parse v0.0.0 (/checkout/src/librustc_parse)
   Compiling rustc_ast_lowering v0.0.0 (/checkout/src/librustc_ast_lowering)
---
   Compiling rustc_parse_format v0.0.0 (/checkout/src/librustc_parse_format)
   Compiling tracing v0.1.15
   Compiling rustc_ast_pretty v0.0.0 (/checkout/src/librustc_ast_pretty)
   Compiling rustc_hir v0.0.0 (/checkout/src/librustc_hir)
   Compiling rustc_query_system v0.0.0 (/checkout/src/librustc_query_system)
   Compiling chalk-engine v0.14.0
   Compiling rustc_hir_pretty v0.0.0 (/checkout/src/librustc_hir_pretty)
   Compiling rustc_parse v0.0.0 (/checkout/src/librustc_parse)
   Compiling rustc_ast_lowering v0.0.0 (/checkout/src/librustc_ast_lowering)
---
...............................i.................................................................... 1900/10413
.................................................................................................... 2000/10413
..........................................................i..i...................................... 2100/10413
.................................................................................................... 2200/10413
................................................iiiii............................................... 2300/10413
.................................................................................................... 2500/10413
.................................................................................................... 2600/10413
.................................................................................................... 2700/10413
.................................................................................................... 2800/10413
---
.......i............................................................................................ 5300/10413
.................................................................................................... 5400/10413
........................................i........................................................... 5500/10413
..................................i................................................................. 5600/10413
......................................................ii.ii........i...i............................ 5700/10413
...................................................................................................i 5800/10413
....................i............................................................................... 6000/10413
..............................................................................ii.................... 6100/10413
.................i.................................................................................. 6200/10413
.................................................................................................... 6300/10413
.................................................................................................... 6300/10413
.................................................................................................... 6400/10413
.........................................ii...i..ii...........i..................................... 6500/10413
.................................................................................................... 6700/10413
.................................................................................................... 6800/10413
.................................................................................................... 6800/10413
............................................................................i..ii................... 6900/10413
.................................................................................................... 7100/10413
.................................................................................................... 7200/10413
................................i................................................................... 7300/10413
.................................................................................................... 7400/10413
---
.................................................................................................... 8300/10413
.................................................................................................... 8400/10413
...................................................................................i................ 8500/10413
.................................................................................................... 8600/10413
.....................................iiiiii..iiiiii.i............................................... 8700/10413
.................................................................................................... 8900/10413
.................................................................................................... 9000/10413
.................................................................................................... 9100/10413
.................................................................................................... 9200/10413
---
1 error: using function pointers as const generic parameters is forbidden
-   --> $DIR/issue-71382.rs:16:23
+   --> $DIR/issue-71382.rs:15:23
3    |
4 LL |     fn test<const FN: fn()>(&self) {


The actual stderr differed from the expected stderr.
Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/const-generics/issues/issue-71382/issue-71382.stderr
Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/const-generics/issues/issue-71382/issue-71382.stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args const-generics/issues/issue-71382.rs`
error: 1 errors occurred comparing output.
status: exit code: 1
status: exit code: 1
command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/const-generics/issues/issue-71382.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/const-generics/issues/issue-71382" "-A" "unused" "-Crpath" "-O" "-Cdebuginfo=0" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/const-generics/issues/issue-71382/auxiliary"
------------------------------------------

------------------------------------------
stderr:
stderr:
------------------------------------------
error: using function pointers as const generic parameters is forbidden
  --> /checkout/src/test/ui/const-generics/issues/issue-71382.rs:15:23
   |
LL |     fn test<const FN: fn()>(&self) {

error: aborting due to previous error


---
thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:344:22
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-8/bin/FileCheck" "--nodejs" "/usr/bin/node" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "8.0.0" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"


failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test --exclude src/tools/tidy
Build completed unsuccessfully in 1:08:38
Build completed unsuccessfully in 1:08:38
== clock drift check ==
  local time: Sat Jun 27 12:52:11 UTC 2020
  network time: Sat, 27 Jun 2020 12:52:11 GMT
== end clock drift check ==

##[error]Bash exited with code '1'.
##[section]Finishing: Run build
##[section]Starting: Checkout rust-lang/rust@refs/pull/73795/merge to s
Task         : Get sources
Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
Version      : 1.0.0
Author       : Microsoft
Author       : Microsoft
Help         : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
==============================================================================
Cleaning any cached credential from repository: rust-lang/rust (GitHub)
##[section]Finishing: Checkout rust-lang/rust@refs/pull/73795/merge to s
Cleaning up task key
Start cleaning up orphan processes.
Terminate orphan process: pid (4216) (python)
##[section]Finishing: Finalize Job

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @rust-lang/infra. (Feature Requests)

[oli-obk]

@bors r+ rollup

[bors]

📌 Commit 1d16aed has been approved by oli-obk