[llvm] [X86][GlobalISel] - Legalize And Select of G_FPTOSI/G_SITOFP in X87 mode (PR #137377)

[Matt Arsenault via llvm-commits]

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@@ -512,9 +522,18 @@ X86LegalizerInfo::X86LegalizerInfo(const X86Subtarget &STI,
                 (typePairInSet(0, 1, {{s32, s64}})(Query) ||
                  (Is64Bit && typePairInSet(0, 1, {{s64, s64}})(Query))));
       })
-      .clampScalar(1, s32, HasSSE2 ? s64 : s32)
+      .customIf([=](const LegalityQuery &Query) -> bool {
+        if (!UseX87)
+          return false;
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arsenm wrote:

Use the new format that pulls the predicate out of the legality query? 

https://github.com/llvm/llvm-project/pull/137377