[llvm] [AArch64][GlobalISel] Add `G_FMODF` instruction (PR #160061)

[Matt Arsenault via llvm-commits]

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@@ -702,6 +704,46 @@ LegalizerHelper::LegalizeResult LegalizerHelper::emitSincosLibcall(
   return LegalizerHelper::Legalized;
 }
 
+LegalizerHelper::LegalizeResult
+LegalizerHelper::emitModfLibcall(MachineInstr &MI, MachineIRBuilder &MIRBuilder,
+                                 unsigned Size, Type *OpType,
+                                 LostDebugLocObserver &LocObserver) {
+  MachineFunction &MF = *MI.getMF();
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arsenm wrote:

The MIRBuilder is the home of the context you're working in. Getting it through the MachineInstr is more levels of indirection, it has to query the parent block and then the block's parent 

https://github.com/llvm/llvm-project/pull/160061