[llvm] [GISel] Add more FP opcodes to CSE (PR #123624)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-x86_64-debian-dylib` running on `gribozavr4` while building `llvm` at step 7 "test-build-unified-tree-check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/60/builds/17654

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

```
Step 7 (test-build-unified-tree-check-llvm) failure: test (failure)
...
2.030 [2/10/725] Linking CXX executable unittests/Target/WebAssembly/WebAssemblyTests
2.076 [2/9/726] Linking CXX executable unittests/Target/LoongArch/LoongArchTests
2.122 [2/8/727] Linking CXX executable unittests/Target/ARM/ARMTests
2.207 [2/7/728] Linking CXX executable unittests/Target/SPIRV/SPIRVTests
2.249 [2/6/729] Linking CXX executable unittests/Target/RISCV/RISCVTests
2.263 [2/5/730] Linking CXX executable unittests/Target/AArch64/AArch64Tests
2.354 [2/4/731] Linking CXX executable unittests/tools/llvm-mca/LLVMMCATests
3.038 [2/3/732] Linking CXX executable unittests/Target/AMDGPU/AMDGPUTests
3.065 [2/2/733] Linking CXX executable unittests/tools/llvm-exegesis/LLVMExegesisTests
7.795 [2/1/734] Building CXX object unittests/CodeGen/GlobalISel/CMakeFiles/GlobalISelTests.dir/CSETest.cpp.o
FAILED: unittests/CodeGen/GlobalISel/CMakeFiles/GlobalISelTests.dir/CSETest.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /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/b/1/llvm-x86_64-debian-dylib/build/unittests/CodeGen/GlobalISel -I/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel -I/b/1/llvm-x86_64-debian-dylib/build/include -I/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include -I/b/1/llvm-x86_64-debian-dylib/llvm-project/third-party/unittest/googletest/include -I/b/1/llvm-x86_64-debian-dylib/llvm-project/third-party/unittest/googlemock/include -fPIC -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  -Wno-variadic-macros -Wno-gnu-zero-variadic-macro-arguments -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -std=c++17 -MD -MT unittests/CodeGen/GlobalISel/CMakeFiles/GlobalISelTests.dir/CSETest.cpp.o -MF unittests/CodeGen/GlobalISel/CMakeFiles/GlobalISelTests.dir/CSETest.cpp.o.d -o unittests/CodeGen/GlobalISel/CMakeFiles/GlobalISelTests.dir/CSETest.cpp.o -c /b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:84:14: error: no member named 'setFlag' in 'llvm::MachineInstrBuilder'; did you mean 'setMIFlag'?
    MIBFAdd2.setFlag(MachineInstr::FmNsz);
             ^~~~~~~
             setMIFlag
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/CodeGen/MachineInstrBuilder.h:280:30: note: 'setMIFlag' declared here
  const MachineInstrBuilder &setMIFlag(MachineInstr::MIFlag Flag) const {
                             ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:87:13: error: no member named 'clearFlag' in 'llvm::MachineInstrBuilder'; did you mean to use '->' instead of '.'?
    MIBFAdd2.clearFlag(MachineInstr::FmNsz);
            ^
            ->
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:97:14: error: no member named 'setFlag' in 'llvm::MachineInstrBuilder'; did you mean 'setMIFlag'?
    MIBFSub2.setFlag(MachineInstr::FmNoNans);
             ^~~~~~~
             setMIFlag
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/CodeGen/MachineInstrBuilder.h:280:30: note: 'setMIFlag' declared here
  const MachineInstrBuilder &setMIFlag(MachineInstr::MIFlag Flag) const {
                             ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:100:13: error: no member named 'clearFlag' in 'llvm::MachineInstrBuilder'; did you mean to use '->' instead of '.'?
    MIBFSub2.clearFlag(MachineInstr::FmNoNans);
            ^
            ->
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:110:14: error: no member named 'setFlag' in 'llvm::MachineInstrBuilder'; did you mean 'setMIFlag'?
    MIBFMul2.setFlag(MachineInstr::FmNoNans);
             ^~~~~~~
             setMIFlag
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/CodeGen/MachineInstrBuilder.h:280:30: note: 'setMIFlag' declared here
  const MachineInstrBuilder &setMIFlag(MachineInstr::MIFlag Flag) const {
                             ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:113:13: error: no member named 'clearFlag' in 'llvm::MachineInstrBuilder'; did you mean to use '->' instead of '.'?
    MIBFMul2.clearFlag(MachineInstr::FmNoNans);
            ^
            ->
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/unittests/CodeGen/GlobalISel/CSETest.cpp:123:14: error: no member named 'setFlag' in 'llvm::MachineInstrBuilder'; did you mean 'setMIFlag'?
    MIBFDiv2.setFlag(MachineInstr::FmNoNans);
             ^~~~~~~
             setMIFlag

```

</details>

https://github.com/llvm/llvm-project/pull/123624