[llvm] [SPIRV] Improve vector legalization and type deduction (PR #175067)

[Steven Perron via llvm-commits]

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@@ -818,6 +915,8 @@ bool SPIRVLegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
     return legalizeSpvInsertElt(Helper, MI, GR);
   case Intrinsic::spv_extractelt:
     return legalizeSpvExtractElt(Helper, MI, GR);
+  case Intrinsic::spv_const_composite:
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s-perron wrote:

The zeroinitializer does as well, and together they test both path in this case.

https://github.com/llvm/llvm-project/pull/175067