[llvm] [aarch64][win] Add support for import call optimization (equivalent to MSVC /d2ImportCallOptimization) (PR #121516)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64-aix` running on `aix-ppc64` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/64/builds/1947

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
188.355 [1448/10/126] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineScheduler.cpp.o
190.547 [1447/10/127] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MBFIWrapper.cpp.o
191.798 [1446/10/128] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PatchableFunction.cpp.o
192.272 [1445/10/129] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MLRegAllocPriorityAdvisor.cpp.o
194.656 [1444/10/130] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePipeliner.cpp.o
195.740 [1443/10/131] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrintingPass.cpp.o
198.141 [1442/10/132] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/OptimizePHIs.cpp.o
198.926 [1441/10/133] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRSampleProfile.cpp.o
199.501 [1440/10/134] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineVerifier.cpp.o
199.770 [1439/10/135] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrinter.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrinter.cpp.o 
/usr/local/clang-17.0.2/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_LARGE_FILE_API -D_XOPEN_SOURCE=700 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/lib/CodeGen -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/lib/CodeGen -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/include -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/include -mcmodel=large -fPIC -Werror -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 -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrinter.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrinter.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrinter.cpp.o -c /home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/lib/CodeGen/MIRPrinter.cpp
/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/lib/CodeGen/MIRPrinter.cpp:607:19: error: loop variable '[CallInst, CG]' creates a copy from type 'const llvm::detail::DenseMapPair<const llvm::MachineInstr *, std::pair<const llvm::GlobalValue *, unsigned int>>' [-Werror,-Wrange-loop-construct]
  607 |   for (const auto [CallInst, CG] : MF.getCalledGlobals()) {
      |                   ^
/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/lib/CodeGen/MIRPrinter.cpp:607:8: note: use reference type 'const llvm::detail::DenseMapPair<const llvm::MachineInstr *, std::pair<const llvm::GlobalValue *, unsigned int>> &' to prevent copying
  607 |   for (const auto [CallInst, CG] : MF.getCalledGlobals()) {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                   &
1 error generated.
200.722 [1439/9/136] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MacroFusion.cpp.o
202.273 [1439/8/137] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PHIEliminationUtils.cpp.o
204.141 [1439/7/138] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PostRAHazardRecognizer.cpp.o
205.153 [1439/6/139] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PHIElimination.cpp.o
207.698 [1439/5/140] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/ModuloSchedule.cpp.o
208.453 [1439/4/141] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/ProcessImplicitDefs.cpp.o
209.022 [1439/3/142] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PeepholeOptimizer.cpp.o
212.686 [1439/2/143] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PostRASchedulerList.cpp.o
215.021 [1439/1/144] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PreISelIntrinsicLowering.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/121516