[llvm] [Mips] Add lowerConstantFP to optimize some floating load instrs to mtc1+mthc1 (PR #196226)

[Ying Huang via llvm-commits]

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@@ -272,6 +273,9 @@ MipsTargetLowering::MipsTargetLowering(const MipsTargetMachine &TM,
     setOperationAction(ISD::FCANONICALIZE, MVT::f64, Custom);
   }
 
+  if (Subtarget.hasMips32r2())
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yingopq wrote:

Done.

https://github.com/llvm/llvm-project/pull/196226