[llvm] [GISel][RISCV] Legalize `G_FREM` to use fmod (PR #93063)

[Michael Maitland via llvm-commits]

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@@ -372,6 +372,11 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST)
                                G_FABS, G_FSQRT, G_FMAXNUM, G_FMINNUM})
       .legalIf(typeIsScalarFPArith(0, ST));
 
+  getActionDefinitionsBuilder(G_FREM)
+      .libcallFor({s32, s64})
+      .minScalar(0, s32)
+      .scalarize(0);
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michaelmaitland wrote:

Are there tests for the `scalarize` case? I don't think we should scalarize if we don't have test covereage for it. I would prefer legalizing to fail.

https://github.com/llvm/llvm-project/pull/93063