'spirv.Bitcast' op result #0 must be 8/16/32/64-bit... got a 'vector<1xf32>' -- Shark on MacOS(Vulkan gpu)

[Ranvirsv]

What happened?

Trying to run shark on MacOS(Mac with M2 pro chip) with vulkan gpu, it runs into the issue:

<eval_with_key>.25:146:17: error: 'spirv.Bitcast' op result #0 must be 8/16/32/64-bit integer or 16/32/64-bit float or bool or vector of bool or 8/16/32/64-bit integer or 16/32/64-bit float values of length 2/3/4/8/16 or any SPIR-V pointer type, but got 'vector<1xf32>'
<eval_with_key>.25:146:17: note: see current operation: %119 = "spirv.Bitcast"(%114) : (vector<2xf16>) -> vector<1xf32>

I have attached the error.log file
error.log

Steps to reproduce your issue

1. cd SHARK

2. Get the input mlir
   Set the location for IREE_SAVE_TEMPS
   export IREE_SAVE_TEMPS=/path/to/some/directory

   Run the command to get the inpur mlir
   python3 apps/stable_diffusion/scripts/txt2img.py -p "a photograph of an astronaut riding a horse" --save_vmfb

3. Compile the core-input.mlir
   iree-compile-binary path\to\core-input.mlir --iree-vulkan-target-triple=m1-unknown-macos --iree-stream-resource-index-bits=64 --iree-vm-target-index-bits=64 --iree-hal-target-backends=vulkan -o core.vmfb 2> error.log