[clang] Reapply "[C++20][Modules] Implement P1857R3 Modules Dependency Discovery" (PR #173130)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-hwasan` running on `sanitizer-buildbot11` while building `clang` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/55/builds/21886

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 93603 tests, 72 workers --
Testing:  0.. 
FAIL: Clang :: CodeGenCXX/optnone-pragma-optimize-off.cpp (10585 of 93603)
******************** TEST 'Clang :: CodeGenCXX/optnone-pragma-optimize-off.cpp' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 1
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/22/include -nostdsysteminc /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp -triple aarch64-unknown-linux-gnu -O1 -disable-llvm-passes -emit-llvm -o - | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/22/include -nostdsysteminc /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp -triple aarch64-unknown-linux-gnu -O1 -disable-llvm-passes -emit-llvm -o -
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
# | Stack dump:
# | 0.	Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/22/include -nostdsysteminc /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp -triple aarch64-unknown-linux-gnu -O1 -disable-llvm-passes -emit-llvm -o -
# | 1.	<eof> parser at end of file
# | 2.	/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp:8:17: parsing function body 'foo'
# | 3.	/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp:8:17: in compound statement ('{}')
# |  #0 0x0000c9c42eeee474 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:842:13
# |  #1 0x0000c9c42eee8a28 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Signals.cpp:109:18
# |  #2 0x0000c9c42eef0834 SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:429:38
# |  #3 0x0000e35494a3c9c0 (linux-vdso.so.1+0x9c0)
# |  #4 0x0000e3549434a460 (/lib/aarch64-linux-gnu/libc.so.6+0x8a460)
# |  #5 0x0000e354942f76c0 raise (/lib/aarch64-linux-gnu/libc.so.6+0x376c0)
# |  #6 0x0000e354942e1ac8 abort (/lib/aarch64-linux-gnu/libc.so.6+0x21ac8)
# |  #7 0x0000c9c427d9b74c __sanitizer::Atexit(void (*)()) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:170:10
# |  #8 0x0000c9c427d99e4c __sanitizer::Die() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:52:5
# |  #9 0x0000c9c427d8c550 Unlock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_mutex.h:250:16
# | #10 0x0000c9c427d8c550 ~GenericScopedLock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_mutex.h:386:51
# | #11 0x0000c9c427d8c550 __hwasan::ScopedReport::~ScopedReport() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:54:5
# | #12 0x0000c9c427d8bcd8 __hwasan::(anonymous namespace)::BaseReport::~BaseReport() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:477:7
# | #13 0x0000c9c427d89a88 __hwasan::ReportTagMismatch(__sanitizer::StackTrace*, unsigned long, unsigned long, bool, bool, unsigned long*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:1094:1
# | #14 0x0000c9c427d75760 Destroy /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_common.h:542:31
# | #15 0x0000c9c427d75760 ~InternalMmapVector /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_common.h:652:56
# | #16 0x0000c9c427d75760 __hwasan::HandleTagMismatch(__hwasan::AccessInfo, unsigned long, unsigned long, void*, unsigned long*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan.cpp:245:1
# | #17 0x0000c9c427d77ca8 __hwasan_tag_mismatch4 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan.cpp:764:1
# | #18 0x0000c9c427d8d574 __interception::InterceptFunction(char const*, unsigned long*, unsigned long, unsigned long) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/interception/interception_linux.cpp:60:0
# | #19 0x0000c9c4371dd644 clang::Lexer::LexTokenInternal(clang::Token&, bool) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Lex/Lexer.cpp:4045:27
# | #20 0x0000c9c4371d507c clang::Lexer::Lex(clang::Token&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Lex/Lexer.cpp:3742:25
# | #21 0x0000c9c4372f6ca4 clang::Preprocessor::Lex(clang::Token&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Lex/Preprocessor.cpp:905:3
# | #22 0x0000c9c433f830c0 clang::Parser::ConsumeBrace() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/Parse/Parser.h:671:12
Step 11 (stage2/hwasan check) failure: stage2/hwasan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 93603 tests, 72 workers --
Testing:  0.. 
FAIL: Clang :: CodeGenCXX/optnone-pragma-optimize-off.cpp (10585 of 93603)
******************** TEST 'Clang :: CodeGenCXX/optnone-pragma-optimize-off.cpp' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 1
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/22/include -nostdsysteminc /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp -triple aarch64-unknown-linux-gnu -O1 -disable-llvm-passes -emit-llvm -o - | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/22/include -nostdsysteminc /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp -triple aarch64-unknown-linux-gnu -O1 -disable-llvm-passes -emit-llvm -o -
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
# | Stack dump:
# | 0.	Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/22/include -nostdsysteminc /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp -triple aarch64-unknown-linux-gnu -O1 -disable-llvm-passes -emit-llvm -o -
# | 1.	<eof> parser at end of file
# | 2.	/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp:8:17: parsing function body 'foo'
# | 3.	/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/CodeGenCXX/optnone-pragma-optimize-off.cpp:8:17: in compound statement ('{}')
# |  #0 0x0000c9c42eeee474 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:842:13
# |  #1 0x0000c9c42eee8a28 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Signals.cpp:109:18
# |  #2 0x0000c9c42eef0834 SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:429:38
# |  #3 0x0000e35494a3c9c0 (linux-vdso.so.1+0x9c0)
# |  #4 0x0000e3549434a460 (/lib/aarch64-linux-gnu/libc.so.6+0x8a460)
# |  #5 0x0000e354942f76c0 raise (/lib/aarch64-linux-gnu/libc.so.6+0x376c0)
# |  #6 0x0000e354942e1ac8 abort (/lib/aarch64-linux-gnu/libc.so.6+0x21ac8)
# |  #7 0x0000c9c427d9b74c __sanitizer::Atexit(void (*)()) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:170:10
# |  #8 0x0000c9c427d99e4c __sanitizer::Die() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:52:5
# |  #9 0x0000c9c427d8c550 Unlock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_mutex.h:250:16
# | #10 0x0000c9c427d8c550 ~GenericScopedLock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_mutex.h:386:51
# | #11 0x0000c9c427d8c550 __hwasan::ScopedReport::~ScopedReport() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:54:5
# | #12 0x0000c9c427d8bcd8 __hwasan::(anonymous namespace)::BaseReport::~BaseReport() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:477:7
# | #13 0x0000c9c427d89a88 __hwasan::ReportTagMismatch(__sanitizer::StackTrace*, unsigned long, unsigned long, bool, bool, unsigned long*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:1094:1
# | #14 0x0000c9c427d75760 Destroy /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_common.h:542:31
# | #15 0x0000c9c427d75760 ~InternalMmapVector /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_common.h:652:56
# | #16 0x0000c9c427d75760 __hwasan::HandleTagMismatch(__hwasan::AccessInfo, unsigned long, unsigned long, void*, unsigned long*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan.cpp:245:1
# | #17 0x0000c9c427d77ca8 __hwasan_tag_mismatch4 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan.cpp:764:1
# | #18 0x0000c9c427d8d574 __interception::InterceptFunction(char const*, unsigned long*, unsigned long, unsigned long) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/interception/interception_linux.cpp:60:0
# | #19 0x0000c9c4371dd644 clang::Lexer::LexTokenInternal(clang::Token&, bool) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Lex/Lexer.cpp:4045:27
# | #20 0x0000c9c4371d507c clang::Lexer::Lex(clang::Token&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Lex/Lexer.cpp:3742:25
# | #21 0x0000c9c4372f6ca4 clang::Preprocessor::Lex(clang::Token&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Lex/Preprocessor.cpp:905:3
# | #22 0x0000c9c433f830c0 clang::Parser::ConsumeBrace() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/Parse/Parser.h:671:12

```

</details>

https://github.com/llvm/llvm-project/pull/173130