[llvm] [AMDGPU][GlobalISel] Add RegBankLegalize support for G_FLDEXP (PR #175072)

[Matt Arsenault via llvm-commits]

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@@ -978,6 +978,14 @@ RegBankLegalizeRules::RegBankLegalizeRules(const GCNSubtarget &_ST,
       .Uni(S32, {{UniInVgprS32}, {Vgpr32, Vgpr32, Vgpr32}})
       .Div(S32, {{Vgpr32}, {Vgpr32, Vgpr32, Vgpr32}});
 
+  addRulesForGOpcs({G_FLDEXP}, Standard)
+      .Uni(S16, {{UniInVgprS16}, {Vgpr16, Vgpr16}})
+      .Div(S16, {{Vgpr16}, {Vgpr16, Vgpr16}})
+      .Uni(S32, {{UniInVgprS32}, {Vgpr32, Vgpr32}})
+      .Div(S32, {{Vgpr32}, {Vgpr32, Vgpr32}})
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arsenm wrote:

Move the common 32-bit cases to the top 

https://github.com/llvm/llvm-project/pull/175072