[llvm-branch-commits] [llvm] AMDGPU/GlobalISel: add RegBankLegalize rules for extends and trunc (PR #132383)

[Fabian Ritter via llvm-branch-commits]

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@@ -489,22 +489,61 @@ RegBankLegalizeRules::RegBankLegalizeRules(const GCNSubtarget &_ST,
       .Uni(B32, {{SgprB32}, {Sgpr32AExtBoolInReg, SgprB32, SgprB32}});
 
   addRulesForGOpcs({G_ANYEXT})
+      .Any({{UniS16, S1}, {{None}, {None}}}) // should be combined away
       .Any({{UniS32, S1}, {{None}, {None}}}) // should be combined away
-      .Any({{UniS32, S16}, {{Sgpr32}, {Sgpr16}}});
+      .Any({{UniS64, S1}, {{None}, {None}}}) // should be combined away
+      .Any({{{DivS16, S1}}, {{Vgpr16}, {Vcc}, VccExtToSel}})
+      .Any({{{DivS32, S1}}, {{Vgpr32}, {Vcc}, VccExtToSel}})
+      .Any({{{DivS64, S1}}, {{Vgpr64}, {Vcc}, VccExtToSel}})
+      .Any({{UniS64, S32}, {{Sgpr64}, {Sgpr32}, Ext32To64}})
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ritter-x2a wrote:

+1 on the need for documentation: It's hard to follow which of the parts serve, e.g., as patterns, replacements, or asserts.

https://github.com/llvm/llvm-project/pull/132383