[clang] [Clang][CodeGen] Use ptrtoaddr for pointer diff (PR #210729)

Mon Aug 17 12:50:41 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `intel-sycl-gpu` running on `intel-sycl-gpu-01` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/225/builds/15674

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
...
PASS: AddressSanitizer-x86_64-linux :: TestCases/printf-5.c (918 of 111530)
UNSUPPORTED: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/dlopen-mixed-c-cxx.c (919 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/free_aligned_sized_mismatch.cpp (920 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/memmem_test.cpp (921 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/mincore.cpp (922 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/deep_tail_call.cpp (923 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/default_ignorelist.cpp (924 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/stack-overflow-recovery-mode.cpp (925 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/stack-overflow-sigbus.cpp (926 of 111530)
XPASS: AddressSanitizer-x86_64-linux :: TestCases/invalid-pointer-pairs-vector-extract.cpp (927 of 111530)
******************** TEST 'AddressSanitizer-x86_64-linux :: TestCases/invalid-pointer-pairs-vector-extract.cpp' FAILED ********************
Exit Code: 0

Command Output (stdout):
--
# RUN: at line 2
/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./bin/clang  --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O2 /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/compiler-rt/test/asan/TestCases/invalid-pointer-pairs-vector-extract.cpp -o /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/invalid-pointer-pairs-vector-extract.cpp.tmp -mllvm -asan-detect-invalid-pointer-pair
# executed command: /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O2 /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/compiler-rt/test/asan/TestCases/invalid-pointer-pairs-vector-extract.cpp -o /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/invalid-pointer-pairs-vector-extract.cpp.tmp -mllvm -asan-detect-invalid-pointer-pair
# RUN: at line 3
env ASAN_OPTIONS=detect_invalid_pointer_pairs=1:halt_on_error=0  /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/invalid-pointer-pairs-vector-extract.cpp.tmp 2>&1 | FileCheck /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/compiler-rt/test/asan/TestCases/invalid-pointer-pairs-vector-extract.cpp
# executed command: env ASAN_OPTIONS=detect_invalid_pointer_pairs=1:halt_on_error=0 /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/invalid-pointer-pairs-vector-extract.cpp.tmp
# executed command: FileCheck /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/compiler-rt/test/asan/TestCases/invalid-pointer-pairs-vector-extract.cpp
# RUN: at line 4
env ASAN_OPTIONS=detect_invalid_pointer_pairs=2:halt_on_error=0  /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/invalid-pointer-pairs-vector-extract.cpp.tmp 2>&1 | FileCheck /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/compiler-rt/test/asan/TestCases/invalid-pointer-pairs-vector-extract.cpp
# executed command: env ASAN_OPTIONS=detect_invalid_pointer_pairs=2:halt_on_error=0 /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/invalid-pointer-pairs-vector-extract.cpp.tmp
# executed command: FileCheck /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/compiler-rt/test/asan/TestCases/invalid-pointer-pairs-vector-extract.cpp

--

********************
PASS: AddressSanitizer-x86_64-linux :: TestCases/invalid-pointer-pairs.cpp (928 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/asan_dlopen_test.cpp (929 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Linux/asan_preload_test-1.cpp (930 of 111530)
PASS: AddressSanitizer-Unit :: ./Asan-x86_64-inline-Dynamic-Test/95/99 (931 of 111530)
PASS: AddressSanitizer-Unit :: ./Asan-x86_64-inline-Dynamic-Test/96/99 (932 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/malloc-size-too-big.cpp (933 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/malloc_context_size.cpp (934 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Posix/asan_symbolize_script/plugin_no_op_help_output.cpp (935 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Posix/asan_symbolize_script/plugin_no_op_symbolicate.cpp (936 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Posix/free_hook_realloc.cpp (937 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/Posix/freopen.cpp (938 of 111530)
PASS: AddressSanitizer-x86_64-linux-dynamic :: TestCases/asan_and_llvm_coverage_test.cpp (939 of 111530)
UNSUPPORTED: AddressSanitizer-x86_64-linux-dynamic :: TestCases/asan_lsan_deadlock.cpp (940 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/Posix/coverage-reset.cpp (941 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/Posix/coverage.cpp (942 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/Posix/gc-test.cpp (943 of 111530)
PASS: AddressSanitizer-x86_64-linux :: TestCases/Posix/glob.cpp (944 of 111530)
PASS: AddressSanitizer-Unit :: ./Asan-x86_64-calls-Dynamic-Test/30/99 (945 of 111530)
PASS: AddressSanitizer-Unit :: ./Asan-x86_64-calls-Dynamic-Test/31/99 (946 of 111530)

```

</details>

https://github.com/llvm/llvm-project/pull/210729