[llvm] [RISCV][GlobalISel] Fold large constant offsets in selectAddrRegImm (PR #219161)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

The build failed before running any tests. Click on a failure below to see the details.

<details>
<summary>[code=1] lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVInstructionSelector.cpp.obj</summary>

```
FAILED: [code=1] lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVInstructionSelector.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\lib\Target\RISCV -IC:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include -imsvc"C:\BuildTools\DIA SDK\include" /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -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 /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Folib\Target\RISCV\CMakeFiles\LLVMRISCVCodeGen.dir\GISel\RISCVInstructionSelector.cpp.obj /Fdlib\Target\RISCV\CMakeFiles\LLVMRISCVCodeGen.dir\LLVMRISCVCodeGen.pdb -c -- C:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV\GISel\RISCVInstructionSelector.cpp
C:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV\GISel\RISCVInstructionSelector.cpp(1718,11): error: variable 'LdSt' with type 'auto *' has incompatible initializer of type 'const llvm::GLoadStore'
1718 |     auto *LdSt = dyn_cast<GLoadStore>(User);
|           ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV\GISel\RISCVInstructionSelector.cpp(1727,31): error: member reference type 'const MachineInstr' is not a pointer; did you mean to use '.'?
1727 |     LLT Ty = MRI->getType(User->getOperand(0).getReg());
|                           ~~~~^~
|                               .
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV\GISel\RISCVInstructionSelector.cpp:16:
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV\RISCVSubtarget.h:18:
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Target\RISCV\RISCVFrameLowering.h:16:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/CodeGen/TargetFrameLowering.h:17:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/CodeGen/MachineBasicBlock.h:21:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/CodeGen/MachineFunctionAnalysisManager.h:16:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/IR/PassManager.h:44:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/ADT/TinyPtrVector.h:13:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/ADT/PointerUnion.h:21:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Support/Casting.h(490,54): error: functional-style cast from rvalue to reference type 'CastReturnType' (aka 'const llvm::GLoadStore &')
490 |   static inline CastReturnType castFailed() { return CastReturnType(nullptr); }
|                                                      ^~~~~~~~~~~~~~~~~~~~~~~
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Support/Casting.h(494,14): note: in instantiation of member function 'llvm::CastInfo<llvm::GLoadStore, const llvm::MachineInstr>::castFailed' requested here
494 |       return castFailed();
|              ^
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Support/Casting.h(645,36): note: in instantiation of member function 'llvm::CastInfo<llvm::GLoadStore, const llvm::MachineInstr>::doCastIfPossible' requested here
645 |   return CastInfo<To, const From>::doCastIfPossible(Val);
|                                    ^
3 errors generated.
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/219161