[llvm] [IR] Truncate struct field offsets exceeding the pointer index width. (PR #213436)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vla` running on `linaro-g3-03` while building `llvm` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/17/builds/16711

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

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'SanitizerCommon-asan-aarch64-Linux :: compress_stack_depot.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/./bin/clang  --driver-mode=g++ -gline-tables-only -fsanitize=address   -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta  -funwind-tables  -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test -ldl /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp -fsanitize-memory-track-origins=1 -o /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# executed command: /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/./bin/clang --driver-mode=g++ -gline-tables-only -fsanitize=address -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -funwind-tables -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test -ldl /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp -fsanitize-memory-track-origins=1 -o /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# .---command stderr------------
# | clang: warning: argument unused during compilation: '-fsanitize-memory-track-origins=1' [-Wunused-command-line-argument]
# `-----------------------------
# RUN: at line 2
env ASAN_OPTIONS="compress_stack_depot=0:malloc_context_size=128:verbosity=1"  /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp 2>&1 | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --implicit-check-not="StackDepot released"
# executed command: env ASAN_OPTIONS=compress_stack_depot=0:malloc_context_size=128:verbosity=1 /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# executed command: FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp '--implicit-check-not=StackDepot released'
# RUN: at line 3
env ASAN_OPTIONS="compress_stack_depot=-1:malloc_context_size=128:verbosity=1"  /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp 2>&1 | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS
# executed command: env ASAN_OPTIONS=compress_stack_depot=-1:malloc_context_size=128:verbosity=1 /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# executed command: FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS
# RUN: at line 4
env ASAN_OPTIONS="compress_stack_depot=-2:malloc_context_size=128:verbosity=1"  /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp 2>&1 | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS
# executed command: env ASAN_OPTIONS=compress_stack_depot=-2:malloc_context_size=128:verbosity=1 /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# executed command: FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS
# RUN: at line 5
env ASAN_OPTIONS="compress_stack_depot=1:malloc_context_size=128:verbosity=1"  /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp 2>&1 | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS,THREAD
# executed command: env ASAN_OPTIONS=compress_stack_depot=1:malloc_context_size=128:verbosity=1 /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# executed command: FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS,THREAD
# RUN: at line 6
env ASAN_OPTIONS="compress_stack_depot=2:malloc_context_size=128:verbosity=1"  /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp 2>&1 | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS,THREAD
# executed command: env ASAN_OPTIONS=compress_stack_depot=2:malloc_context_size=128:verbosity=1 /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-aarch64-Linux/Output/compress_stack_depot.cpp.tmp
# executed command: FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp --check-prefixes=COMPRESS,THREAD
# .---command stderr------------
# | /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp:53:14: error: COMPRESS: expected string not found in input
# | // COMPRESS: StackDepot released {{[0-9]+}}
# |              ^
# | <stdin>:142:56: note: scanning from here
# | AddressSanitizer: StackDepot compression thread started
# |                                                        ^
# | <stdin>:143:19: note: possible intended match here
# | AddressSanitizer: StackDepot compression thread stopped
# |                   ^
# | 
# | Input file: <stdin>
# | Check file: /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/compiler-rt/test/sanitizer_common/TestCases/compress_stack_depot.cpp
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
...

```

</details>

https://github.com/llvm/llvm-project/pull/213436