[llvm] [SCEVExp] Use SCEVPtrToAddr in tryToReuseLCSSAPhi if possible. (PR #178727)

[Florian Hahn via llvm-commits]

fhahn wrote:

@qinkunbao I think that should be fixed on current `main` already.

The latest build appears to be failing with the error blelow. It is missing the stack trace, without the actual failure reason it is difficult to tell what the actual issue is

```
[4798/8399] Building CXX object lib/Target/AMDGPU/MCTargetDesc/CMakeFiles/LLVMAMDGPUDesc.dir/AMDGPUMCCodeEmitter.cpp.o
FAILED: lib/Target/AMDGPU/MCTargetDesc/CMakeFiles/LLVMAMDGPUDesc.dir/AMDGPUMCCodeEmitter.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/clang++ -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/lib/Target/AMDGPU/MCTargetDesc -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Target/AMDGPU/MCTargetDesc -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Target/AMDGPU -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/lib/Target/AMDGPU -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -nostdinc++ -isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_install_msan/include -isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_install_msan/include/c++/v1 -fsanitize=memory -Wl,--rpath=/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_install_msan/lib -L/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_install_msan/lib -w -stdlib=libc++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fno-omit-frame-pointer -gline-tables-only -fsanitize=memory -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fvisibility=hidden -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Target/AMDGPU/MCTargetDesc/CMakeFiles/LLVMAMDGPUDesc.dir/AMDGPUMCCodeEmitter.cpp.o -MF lib/Target/AMDGPU/MCTargetDesc/CMakeFiles/LLVMAMDGPUDesc.dir/AMDGPUMCCodeEmitter.cpp.o.d -o lib/Target/AMDGPU/MCTargetDesc/CMakeFiles/LLVMAMDGPUDesc.dir/AMDGPUMCCodeEmitter.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCCodeEmitter.cpp
[4799/8399] Building CXX object lib/Target/LoongArch/MCTargetDesc/CMakeFiles/LLVMLoongArchDesc.dir/LoongArchMCAsmInfo.cpp.o
```

https://github.com/llvm/llvm-project/pull/178727