[llvm] [SandboxIR] Add ShuffleVectorInst (PR #104891)

[via llvm-commits]

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@@ -739,6 +740,401 @@ define void @foo(i8 %v0, i8 %v1, <2 x i8> %vec) {
       llvm::InsertElementInst::isValidOperands(LLVMArg0, LLVMArgVec, LLVMZero));
 }
 
+TEST_F(SandboxIRTest, ShuffleVectorInst) {
+  parseIR(C, R"IR(
+define void @foo(<2 x i8> %v1, <2 x i8> %v2) {
+  %ins0 = shufflevector <2 x i8> %v1, <2 x i8> %v2, <2 x i32> <i32 0, i32 2>
+  ret void
+}
+)IR");
+  Function &LLVMF = *M->getFunction("foo");
+  sandboxir::Context Ctx(C);
+  auto &F = *Ctx.createFunction(&LLVMF);
+  auto *ArgV1 = F.getArg(0);
+  auto *ArgV2 = F.getArg(1);
+  auto *BB = &*F.begin();
+  auto It = BB->begin();
+  auto *SI = cast<sandboxir::ShuffleVectorInst>(&*It++);
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vporpo wrote:

nit: `SI` is commonly used for `StoreInst`. Perhaps something like `Shuf` would be better?

https://github.com/llvm/llvm-project/pull/104891