fixup! Fixup compile warning and test failure

Author: jthackray

llvm/lib/Target/AMDGPU/AMDGPULowerBufferFatPointers.cpp

@@ -1765,6 +1765,16 @@ Value *SplitPtrStructs::handleMemoryInst(Instruction *I, Value *Arg, Value *Ptr,
                          "buffer resources and should've been expanded away");
       break;
     }
+    case AtomicRMWInst::FMaximum: {
+      report_fatal_error("atomic floating point fmaximum not supported for "
+                         "buffer resources and should've been expanded away");
+      break;
+    }
+    case AtomicRMWInst::FMinimum: {
+      report_fatal_error("atomic floating point fminimum not supported for "
+                         "buffer resources and should've been expanded away");
+      break;
+    }
     case AtomicRMWInst::Nand:
       report_fatal_error("atomic nand not supported for buffer resources and "
                          "should've been expanded away");

llvm/test/CodeGen/RISCV/GlobalISel/legalizer-info-validation.mir

@@ -263,6 +263,12 @@
 # DEBUG-NEXT: G_ATOMICRMW_FMIN (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
 # DEBUG-NEXT: .. type index coverage check SKIPPED: no rules defined
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: no rules defined
+# DEBUG-NEXT: G_ATOMICRMW_FMAXIMUM (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
+# DEBUG-NEXT: .. type index coverage check SKIPPED: no rules defined
+# DEBUG-NEXT: .. imm index coverage check SKIPPED: no rules defined
+# DEBUG-NEXT: G_ATOMICRMW_FMINIMUM (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
+# DEBUG-NEXT: .. type index coverage check SKIPPED: no rules defined
+# DEBUG-NEXT: .. imm index coverage check SKIPPED: no rules defined
 # DEBUG-NEXT: G_ATOMICRMW_UINC_WRAP (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
 # DEBUG-NEXT: .. type index coverage check SKIPPED: no rules defined
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: no rules defined