[llvm] [Mips] Fix compiler crash when returning fp128 after calling a functi… (PR #117525)

[Matt Arsenault via llvm-commits]

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@@ -207,7 +207,7 @@ def RetCC_MipsN : CallingConv<[
       CCIfType<[i8, i16, i32, i64],
           CCIfInReg<CCPromoteToUpperBitsInType<i64>>>>,
 
-  // i64 are returned in registers V0_64, V1_64
+  // i64 are returned in registers V0_64, V1_64, A0_64
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arsenm wrote:

Unrelated change? 

https://github.com/llvm/llvm-project/pull/117525