[llvm] [SDAG] Fix/add more legalization cases for FMODF (PR #127976)

[Benjamin Maxwell via llvm-commits]

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@@ -608,6 +609,7 @@ class LLVM_LIBRARY_VISIBILITY DAGTypeLegalizer {
   SDValue SoftenFloatRes_ExpOp(SDNode *N);
   SDValue SoftenFloatRes_FFREXP(SDNode *N);
   SDValue SoftenFloatRes_FSINCOS(SDNode *N);
+  SDValue SoftenFloatRes_FMODF(SDNode *N);
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MacDue wrote:

Note: `SoftenFloatRes_FMODF` and `SoftenFloatRes_FFREXP` are implicitly assuming the "missing pop" issue does not apply them (and do not attempt to implement the workaround). I think this is likely true, since these lower floats to integers, but I thought I'd point this out. 

https://github.com/llvm/llvm-project/pull/127976