[llvm] [SDAG] Honor signed arguments in floating point libcalls (PR #109134)

[Nikita Popov via llvm-commits]

================
@@ -2205,7 +2205,24 @@ void SelectionDAGLegalize::ExpandFPLibCall(SDNode* Node,
     Results.push_back(Tmp.first);
     Results.push_back(Tmp.second);
   } else {
-    SDValue Tmp = ExpandLibCall(LC, Node, false).first;
+    bool isSignedArgument = false;
----------------
nikic wrote:

```suggestion
    bool IsSignedArgument = false;
```

https://github.com/llvm/llvm-project/pull/109134