[llvm] [AArch64] Simplify legalizer info for G_JUMP_TABLE and G_BRJT. (PR #71962)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-globalisel

@llvm/pr-subscribers-backend-aarch64

Author: Craig Topper (topperc)

<details>
<summary>Changes</summary>

Remove s64 as a valid type for G_JUMP_TABLE since I think it is always a pointer?

Replace custom predicate for G_BRJT with a legalFor that checks 2 types.

---
Full diff: https://github.com/llvm/llvm-project/pull/71962.diff


2 Files Affected:

- (modified) llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp (+2-4) 
- (modified) llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir (+2-2) 


``````````diff
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
index b197b416228bd21..000fd648595222b 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
@@ -930,11 +930,9 @@ AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
   getActionDefinitionsBuilder(G_CONCAT_VECTORS)
       .legalFor({{v4s32, v2s32}, {v8s16, v4s16}, {v16s8, v8s8}});
 
-  getActionDefinitionsBuilder(G_JUMP_TABLE).legalFor({{p0}, {s64}});
+  getActionDefinitionsBuilder(G_JUMP_TABLE).legalFor({p0});
 
-  getActionDefinitionsBuilder(G_BRJT).legalIf([=](const LegalityQuery &Query) {
-    return Query.Types[0] == p0 && Query.Types[1] == s64;
-  });
+  getActionDefinitionsBuilder(G_BRJT).legalFor({{p0, s64}});
 
   getActionDefinitionsBuilder({G_DYN_STACKALLOC,
                                G_STACKSAVE,
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir b/llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
index 2ea8cff5961b9b2..4fa6cd087988128 100644
--- a/llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
@@ -597,8 +597,8 @@
 # DEBUG-NEXT: .. type index coverage check SKIPPED: no rules defined
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: no rules defined
 # DEBUG-NEXT: G_BRJT (opcode {{[0-9]+}}): 2 type indices
-# DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
-# DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
+# DEBUG-NEXT: .. the first uncovered type index: 2, OK
+# DEBUG-NEXT: .. the first uncovered imm index: 0, OK
 # DEBUG-NEXT: G_INSERT_VECTOR_ELT (opcode {{[0-9]+}}): 3 type indices, 0 imm indices
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected

``````````

</details>


https://github.com/llvm/llvm-project/pull/71962