[llvm] [RISCV][GlobalISel] Legalize and select G_ATOMICRMW_ADD instruction (PR #153791)

[Craig Topper via llvm-commits]

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@@ -729,6 +736,21 @@ bool RISCVLegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
     MI.eraseFromParent();
     return true;
   }
+
+  case Intrinsic::riscv_masked_atomicrmw_add_i32:
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topperc wrote:

I decided to do https://github.com/llvm/llvm-project/pull/154845 instead of https://github.com/llvm/llvm-project/pull/154805. So now there is only one set of intrinsics shared for i32 and i64.

> should the cases for riscv_masked_atomicrmw_*_i32/i64 in RISCVLegalizerInfo::legalizeIntrinsic simply return true?

Yes

https://github.com/llvm/llvm-project/pull/153791