[clang] [clang][bytecode] Only implicitly start lifetime of trivially-default-constructible union members (PR #149835)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-bootstrap-asan` running on `sanitizer-buildbot2` while building `clang` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/52/builds/9882

<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-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:73: 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: 91463 tests, 88 workers --
Testing:  0.. 10
FAIL: Clang :: Interpreter/pretty-print.cpp (13728 of 91463)
******************** TEST 'Clang :: Interpreter/pretty-print.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl "int i = 10;" 'extern "C" int printf(const char*,...);'             'auto r1 = printf("i = %d\n", i);' | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck --check-prefix=CHECK-DRIVER /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp # RUN: at line 1
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl 'int i = 10;' 'extern "C" int printf(const char*,...);' 'auto r1 = printf("i = %d\n", i);'
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck --check-prefix=CHECK-DRIVER /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp
cat /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl -Xcc -std=c++11 -Xcc -fno-delayed-template-parsing | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp # RUN: at line 5
+ cat /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl -Xcc -std=c++11 -Xcc -fno-delayed-template-parsing
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp
JIT session error: In graph incr_module_24-jitted-objectbuffer, section .text.startup: relocation target 0x750a5e424044 (_ZN2S3D2Ev:0x750a5e424048 + 0xfffffffffffffffc) is out of range of Delta32 fixup at address 0x750a5e424048 (<anonymous block> @ 0x710a5d20d010 + 0x18)
error: Failed to materialize symbols: { (main, { s3, __orc_init_func.incr_module_24, $.incr_module_24.__inits.0 }) }
JIT session error: Failed to materialize symbols: { (main, { s3 }) }
error: Failed to materialize symbols: { (main, { $.incr_module_25.__inits.0, __orc_init_func.incr_module_25 }) }
error: Failed to materialize symbols: { (main, { __orc_init_func.incr_module_24 }) }
/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp:27:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: (S3 &) @0x{{[0-9a-f]+}}
               ^
<stdin>:6:21: note: scanning from here
(S3) @0x714a5d446ef0
                    ^
<stdin>:11:6: note: possible intended match here
((lambda) &) @0x710a5bd04000
     ^

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: (const char[3]) "ab" 
           2: (int) 123456 
           3: (char[2]) { '1', 'a' } 
           4: (char[3]) "1a" 
Step 11 (stage2/asan check) failure: stage2/asan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:73: 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: 91463 tests, 88 workers --
Testing:  0.. 10
FAIL: Clang :: Interpreter/pretty-print.cpp (13728 of 91463)
******************** TEST 'Clang :: Interpreter/pretty-print.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl "int i = 10;" 'extern "C" int printf(const char*,...);'             'auto r1 = printf("i = %d\n", i);' | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck --check-prefix=CHECK-DRIVER /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp # RUN: at line 1
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl 'int i = 10;' 'extern "C" int printf(const char*,...);' 'auto r1 = printf("i = %d\n", i);'
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck --check-prefix=CHECK-DRIVER /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp
cat /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl -Xcc -std=c++11 -Xcc -fno-delayed-template-parsing | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp # RUN: at line 5
+ cat /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/clang-repl -Xcc -std=c++11 -Xcc -fno-delayed-template-parsing
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp
JIT session error: In graph incr_module_24-jitted-objectbuffer, section .text.startup: relocation target 0x750a5e424044 (_ZN2S3D2Ev:0x750a5e424048 + 0xfffffffffffffffc) is out of range of Delta32 fixup at address 0x750a5e424048 (<anonymous block> @ 0x710a5d20d010 + 0x18)
error: Failed to materialize symbols: { (main, { s3, __orc_init_func.incr_module_24, $.incr_module_24.__inits.0 }) }
JIT session error: Failed to materialize symbols: { (main, { s3 }) }
error: Failed to materialize symbols: { (main, { $.incr_module_25.__inits.0, __orc_init_func.incr_module_25 }) }
error: Failed to materialize symbols: { (main, { __orc_init_func.incr_module_24 }) }
/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp:27:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: (S3 &) @0x{{[0-9a-f]+}}
               ^
<stdin>:6:21: note: scanning from here
(S3) @0x714a5d446ef0
                    ^
<stdin>:11:6: note: possible intended match here
((lambda) &) @0x710a5bd04000
     ^

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/clang/test/Interpreter/pretty-print.cpp

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: (const char[3]) "ab" 
           2: (int) 123456 
           3: (char[2]) { '1', 'a' } 
           4: (char[3]) "1a" 

```

</details>

https://github.com/llvm/llvm-project/pull/149835