[llvm] [llvm] Add support for llvm IR atomicrmw fminimum/fmaximum instructions (PR #136759)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/16899

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: TableGen/GlobalISelCombinerEmitter/match-table-cxx.td' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/llvm-tblgen -I /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/../../../include -gen-global-isel-combiner      -combiners=MyCombiner /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-cxx.td |  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-cxx.td # RUN: at line 1
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/llvm-tblgen -I /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/../../../include -gen-global-isel-combiner -combiners=MyCombiner /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-cxx.td
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-cxx.td
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-cxx.td:99:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: /* 0 */ GIM_SwitchOpcode, /*MI*/0, /*[*/GIMT_Encode2(99), GIMT_Encode2(205), /*)*//*default:*//*Label 5*/ GIMT_Encode4(500),
               ^
<stdin>:350:44: note: scanning from here
 constexpr static uint8_t MatchTable0[] = {
                                           ^
<stdin>:351:2: note: possible intended match here
 /* 0 */ GIM_SwitchOpcode, /*MI*/0, /*[*/GIMT_Encode2(99), GIMT_Encode2(207), /*)*//*default:*//*Label 5*/ GIMT_Encode4(508),
 ^

Input file: <stdin>
Check file: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-cxx.td

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: /*===- TableGen'erated file -------------------------------------*- C++ -*-===*\ 
           2: |* *| 
           3: |* GenMyCombiner Combiner Match Table *| 
           4: |* *| 
           5: |* Automatically generated file, do not edit! *| 
           6: |* *| 
           7: \*===----------------------------------------------------------------------===*/ 
           8:  
           9: #ifdef GET_GICOMBINER_DEPS 
          10: #include "llvm/ADT/SparseBitVector.h" 
          11: namespace llvm { 
          12: extern cl::OptionCategory GICombinerOptionCategory; 
          13: } // end namespace llvm 
          14: #endif // ifdef GET_GICOMBINER_DEPS 
          15:  
          16: #ifdef GET_GICOMBINER_TYPES 
          17: struct GenMyCombinerRuleConfig { 
          18:  SparseBitVector<> DisabledRules; 
          19:  
          20:  bool isRuleEnabled(unsigned RuleID) const; 
          21:  bool parseCommandLineOption(); 
          22:  bool setRuleEnabled(StringRef RuleIdentifier); 
          23:  bool setRuleDisabled(StringRef RuleIdentifier); 
          24: }; 
          25:  
...

```

</details>

https://github.com/llvm/llvm-project/pull/136759