[llvm] [SPIR-V] Add missing read_imageh builtin mapping (PR #222549)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -12,10 +12,13 @@
 
 ; CHECK-SPIRV: %[[#IntTy:]] = OpTypeInt
 ; CHECK-SPIRV: %[[#IVecTy:]] = OpTypeVector %[[#IntTy]]
-; CHECK-SPIRV: %[[#FloatTy:]] = OpTypeFloat
+; CHECK-SPIRV: %[[#FloatTy:]] = OpTypeFloat 32
 ; CHECK-SPIRV: %[[#FVecTy:]] = OpTypeVector %[[#FloatTy]]
+; CHECK-SPIRV: %[[#HalfTy:]] = OpTypeFloat 16
+; CHECK-SPIRV: %[[#HVecTy:]] = OpTypeVector %[[#HalfTy]]
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jmmartinez wrote:

Nit: Can we match for the 4 in the `OpTypeVector` too?

https://github.com/llvm/llvm-project/pull/222549