[llvm] Put legal action first for G_ATOMIC_CMPXCHG (PR #74613)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-aarch64

Author: Thomas Preud'homme (RoboTux)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/74613.diff


1 Files Affected:

- (modified) llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp (+3-3) 


``````````diff
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
index 21a412e9360dc..7df49d188c332 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
@@ -758,11 +758,11 @@ AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
           all(typeInSet(0, {s8, s16, s32, s64, s128}), typeIs(2, p0)));
 
   getActionDefinitionsBuilder(G_ATOMIC_CMPXCHG)
+      .clampScalar(0, s32, s128)
+      .legalIf(all(typeInSet(0, {s32, s64}), typeIs(1, p0)))
       .customIf([](const LegalityQuery &Query) {
         return Query.Types[0].getSizeInBits() == 128;
-      })
-      .clampScalar(0, s32, s64)
-      .legalIf(all(typeInSet(0, {s32, s64}), typeIs(1, p0)));
+      });
 
   getActionDefinitionsBuilder(
       {G_ATOMICRMW_XCHG, G_ATOMICRMW_ADD, G_ATOMICRMW_SUB, G_ATOMICRMW_AND,

``````````

</details>


https://github.com/llvm/llvm-project/pull/74613