[llvm] [RISCV][GISel] Lower G_FCONSTANT to constant pool load without F or D. (PR #73034)

[Michael Maitland via llvm-commits]

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@@ -273,7 +274,9 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST)
   getActionDefinitionsBuilder(G_IS_FPCLASS)
       .customIf(all(typeIs(0, s1), typeIsScalarFPArith(1, ST)));
 
-  getActionDefinitionsBuilder(G_FCONSTANT).legalIf(typeIsScalarFPArith(0, ST));
+  getActionDefinitionsBuilder(G_FCONSTANT)
+      .legalIf(typeIsScalarFPArith(0, ST))
+      .lowerFor({s32, s64});
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michaelmaitland wrote:

How do we know that the `GFConstantMI.getOperand(1).getFPImm()` is in the constant pool?

https://github.com/llvm/llvm-project/pull/73034