[llvm] [AMDGPU] Add regbankselect rules for G_ICMP/G_FCMP (PR #172048)

[Anshil Gandhi via llvm-commits]

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@@ -561,13 +561,16 @@ RegBankLegalizeRules::RegBankLegalizeRules(const GCNSubtarget &_ST,
   addRulesForGOpcs({G_FREEZE}).Any({{DivS1}, {{Vcc}, {Vcc}}});
 
   addRulesForGOpcs({G_ICMP})
+      .Any({{UniS1, _, S16}, {{Sgpr32Trunc}, {None, Sgpr32AExt, Sgpr32AExt}}})
+      .Any({{DivS1, _, S16}, {{Vcc}, {None, Vgpr16, Vgpr16}}})
       .Any({{UniS1, _, S32}, {{Sgpr32Trunc}, {None, Sgpr32, Sgpr32}}})
       .Any({{DivS1, _, S32}, {{Vcc}, {None, Vgpr32, Vgpr32}}})
-      .Any({{DivS1, _, S64}, {{Vcc}, {None, Vgpr64, Vgpr64}}});
-
-  addRulesForGOpcs({G_FCMP})
-      .Any({{UniS1, _, S32}, {{UniInVcc}, {None, Vgpr32, Vgpr32}}})
-      .Any({{DivS1, _, S32}, {{Vcc}, {None, Vgpr32, Vgpr32}}});
+      .Any({{UniS1, _, S64}, {{UniInVcc}, {None, Vgpr64, Vgpr64}}})
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gandhi56 wrote:

Added a rule to legalize uniform 64-bit compares on SALU.

https://github.com/llvm/llvm-project/pull/172048