[llvm] [SPIR-V] Emit ceil(Bitwidth / 32) words during OpConstant creation (PR #180218)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -21,3 +27,10 @@ entry:
   store i128 0, ptr addrspace(4) %p, align 16
   ret void
 }
+
+define spir_func void @test_i96_const(ptr addrspace(4) %p) addrspace(4) {
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jmmartinez wrote:

Would it be possible to have an i97 or i104 or something with a bitwidth not a multiple of 32?

I'm think that for the last word maybe we have to mask it such that we do not consider extra bits in the APInt's raw data. (I suppose APInt sets everything to 0 though and it may be safe).

https://github.com/llvm/llvm-project/pull/180218