Zig standard library pow function causes enzyme to fail

Hi, I've got some basic functionality working with Zig using the C API/ABI, but I've noticed that using Zig's `std.math.pow` function emits some IR that seems to break Enzyme. `std.math.cos` works fine, as do basic math operations.

This is on an M2 mac, and Enzyme installed via homebrew. I believe the install brought llvm-19 with it, so I'm running Enzyme with that. The error message is huge, so I'll just post the last bit here and attach the input.ll which produced it.

[input.txt](https://github.com/user-attachments/files/21338581/input.txt)

```
constantinst[ %common.ret.op.i = phi float [ %29, %26 ], [ %48, %47 ], [ %53, %51 ], [ %65, %62 ], [ 0x7FF0000000000000, %24 ], [ 1.000000e+00, %30 ], [ %.1.i, %35 ], [ 0.000000e+00, %43 ], [ 0x7FF0000000000000, %45 ], [ 0x7FF8000000000000, %54 ], [ %163, %160 ], [ %141, %139 ], [ %149, %145 ], [ %159, %152 ], [ %169, %167 ], [ %191, %172 ], [ %171, %170 ], [ %.sroa.09.3.i, %118 ], [ %.sroa.09.3.i, %123 ], [ 0x7FF0000000000000, %.thread ], [ 0.000000e+00, %math.pow.isOddInteger.exit.thread ], [ %spec.select, %25 ], [ %common.ret.op.i.ph, %math.pow.pow__anon_3229.exit.loopexit ]] = 0 val:0 type: {[-1]:Float@float}
constantinst[ ret float %common.ret.op.i] = 1 val:1 type: {}
cannot handle unknown binary operator: %74 = and i32 %68, -2139095041
```

A full repro can be found here (https://github.com/Copper280z/Enzyme-Zig/blob/ef1b186aa42e3cd33ffbfe217708b26a0fd5a37f/src/main.zig#L67), enzyme is run from the buid system, so you can just `zig build` and it'll build the source, run enzyme, and compile the output to an executable. Uncomment these lines and the enzyme step fails. Everything works as I'd expect with them commented out.