[llvm] [CodeGen] Use temp symbol for MBBs (PR #95031)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-x86_64-debian` running on `lldb-x86_64-debian` while building `llvm` at step 4 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/162/builds/405

Here is the relevant piece of the build log for the reference:
```
Step 4 (build) failure: build (failure)
...
3.886 [593/72/31] Building CXX object lib/MC/CMakeFiles/LLVMMC.dir/ConstantPools.cpp.o
3.887 [592/72/32] Building CXX object lib/MC/MCParser/CMakeFiles/LLVMMCParser.dir/COFFMasmParser.cpp.o
3.934 [591/72/33] Building CXX object lib/MC/MCParser/CMakeFiles/LLVMMCParser.dir/WasmAsmParser.cpp.o
3.983 [590/72/34] Building CXX object lib/MC/CMakeFiles/LLVMMC.dir/MCWinCOFFStreamer.cpp.o
4.020 [589/72/35] Building CXX object lib/MC/CMakeFiles/LLVMMC.dir/MCExpr.cpp.o
4.067 [588/72/36] Building CXX object lib/MC/MCDisassembler/CMakeFiles/LLVMMCDisassembler.dir/Disassembler.cpp.o
4.068 [587/72/37] Building CXX object lib/Target/BPF/MCTargetDesc/CMakeFiles/LLVMBPFDesc.dir/BPFMCTargetDesc.cpp.o
4.077 [586/72/38] Building CXX object lib/Target/Hexagon/MCTargetDesc/CMakeFiles/LLVMHexagonDesc.dir/HexagonMCInstrInfo.cpp.o
4.130 [585/72/39] Building CXX object lib/MC/CMakeFiles/LLVMMC.dir/MCAsmInfo.cpp.o
4.268 [584/72/40] Building CXX object lib/MC/CMakeFiles/LLVMMC.dir/MCContext.cpp.o
FAILED: lib/MC/CMakeFiles/LLVMMC.dir/MCContext.cpp.o 
/usr/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/worker/2.0.1/lldb-x86_64-debian/build/lib/MC -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/MC -I/home/worker/2.0.1/lldb-x86_64-debian/build/include -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include -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 -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/MC/CMakeFiles/LLVMMC.dir/MCContext.cpp.o -MF lib/MC/CMakeFiles/LLVMMC.dir/MCContext.cpp.o.d -o lib/MC/CMakeFiles/LLVMMC.dir/MCContext.cpp.o -c /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/MC/MCContext.cpp
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/MC/MCContext.cpp:328:61: error: invalid operands to binary expression ('llvm::StringRef' and 'const llvm::Twine')
  return createRenamableSymbol(MAI->getPrivateLabelPrefix() << Name,
                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^  ~~~~
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/ADT/Twine.h:572:23: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
  inline raw_ostream &operator<<(raw_ostream &OS, const Twine &RHS) {
                      ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/Support/raw_ostream.h:783:14: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
raw_ostream &operator<<(raw_ostream &OS, std::nullopt_t);
             ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/Support/VersionTuple.h:191:14: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
raw_ostream &operator<<(raw_ostream &Out, const VersionTuple &V);
             ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/ADT/APInt.h:2128:21: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
inline raw_ostream &operator<<(raw_ostream &OS, const APInt &I) {
                    ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/MC/MCInst.h:241:21: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
inline raw_ostream& operator<<(raw_ostream &OS, const MCOperand &MO) {
                    ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/MC/MCInst.h:246:21: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
inline raw_ostream& operator<<(raw_ostream &OS, const MCInst &MI) {
                    ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/MC/MCExpr.h:138:21: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
                    ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/MC/MCLabel.h:49:21: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) {
                    ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/MC/MCSymbol.h:437:21: note: candidate function not viable: no known conversion from 'llvm::StringRef' to 'llvm::raw_ostream &' for 1st argument
inline raw_ostream &operator<<(raw_ostream &OS, const MCSymbol &Sym) {
                    ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/Support/raw_ostream.h:437:1: note: candidate template ignored: requirement 'std::is_base_of_v<llvm::raw_ostream, llvm::StringRef>' was not satisfied [with OStream = llvm::StringRef, T = llvm::Twine]
operator<<(OStream &&OS, const T &Value) {
^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/Support/raw_ostream.h:787:14: note: candidate template ignored: could not match 'const std::optional<T>' against 'const llvm::Twine'
raw_ostream &operator<<(raw_ostream &OS, const std::optional<T> &O) {
             ^
1 error generated.

```

https://github.com/llvm/llvm-project/pull/95031