[llvm] [RISCV][ISel] Add codegen support for the experimental zabha extension (PR #80192)

[James Y Knight via llvm-commits]

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@@ -19662,6 +19673,9 @@ Value *RISCVTargetLowering::emitMaskedAtomicCmpXchgIntrinsic(
       Intrinsic::getDeclaration(CI->getModule(), CmpXchgIntrID, Tys);
   Value *Result = Builder.CreateCall(
       MaskedCmpXchg, {AlignedAddr, CmpVal, NewVal, Mask, Ordering});
+
+  if (Subtarget.hasStdExtZabha())
+    return Builder.CreateTrunc(Result, CI->getCompareOperand()->getType());
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jyknight wrote:

Can also go away. 

https://github.com/llvm/llvm-project/pull/80192