[llvm] [SandboxVec] Tag insts in a Region with metadata. (PR #109353)

[Sriraman Tallam via llvm-commits]

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@@ -79,3 +78,31 @@ define i8 @foo(i8 %v0, i8 %v1) {
   EXPECT_EQ(Rgn, Other);
 #endif
 }
+
+TEST_F(RegionTest, MetadataRoundTrip) {
+  parseIR(C, R"IR(
+define i8 @foo(i8 %v0, i8 %v1) {
+  %t0 = add i8 %v0, 1
+  %t1 = add i8 %t0, %v1
+  ret i8 %t1
+}
+)IR");
+  llvm::Function *LLVMF = &*M->getFunction("foo");
+  sandboxir::Context Ctx(C);
+  auto *F = Ctx.createFunction(LLVMF);
+  auto *BB = &*F->begin();
+  auto It = BB->begin();
+  auto *T0 = cast<sandboxir::Instruction>(&*It++);
+  auto *T1 = cast<sandboxir::Instruction>(&*It++);
+
+  sandboxir::Region Rgn(Ctx);
+  Rgn.add(T0);
+  Rgn.add(T1);
+
+  SmallVector<std::unique_ptr<sandboxir::Region>> Regions =
+      sandboxir::Region::createRegionsFromMD(*F);
+  ASSERT_EQ(1U, Regions.size());
+#ifndef NDEBUG
+  EXPECT_EQ(Rgn, *Regions[0].get());
+#endif
+}
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tmsri wrote:

+1 Another test with explicit metadata being converted to regions?

https://github.com/llvm/llvm-project/pull/109353