[llvm-bugs] [Bug 38664] New: wasm32: Typo in wasm.memory.grow intrinsics opcode #

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https://bugs.llvm.org/show_bug.cgi?id=38664

            Bug ID: 38664
           Summary: wasm32: Typo in wasm.memory.grow intrinsics opcode #
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: WebAssembly
          Assignee: unassignedbugs at nondot.org
          Reporter: alex at crichton.co
                CC: dan433584 at gmail.com, llvm-bugs at lists.llvm.org

When using the `llvm.wasm.memory.grow.i32` intrinsics I've noticed that the
resulting wasm file fails to run through `wasm2wat`, apparently because it's
being codegened as the `memory.size` instruction (oh dear!).

Upon looking at the various definitions [1] it looks like the grow intrinsic is
defined with the 0x3f opcode (same as current_memory above), but it looks like
0x40 is needed instead?

[1]:
https://github.com/llvm-mirror/llvm/blob/5249baad0eaf2909da62f28252b05993263608f5/lib/Target/WebAssembly/WebAssemblyInstrMemory.td#L471-L492

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