[memprof] Update YAML traits for writer purposes (#118720)

For Frames, we prefer the inline notation for the brevity.

For PortableMemInfoBlock, we go through all member fields and print
out those that are populated.

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/unittests/ProfileData/MemProfTest.cpp b/llvm/unittests/ProfileData/MemProfTest.cpp
index 2f8589b..83383ee 100644
--- a/llvm/unittests/ProfileData/MemProfTest.cpp
+++ b/llvm/unittests/ProfileData/MemProfTest.cpp
@@ -807,4 +807,40 @@ HeapProfileRecords:
   EXPECT_THAT(Record.CallSiteIds,
               ElementsAre(hashCallStack(CS3), hashCallStack(CS4)));
 }
+
+template <typename T> std::string serializeInYAML(T &Val) {
+  std::string Out;
+  llvm::raw_string_ostream OS(Out);
+  llvm::yaml::Output Yout(OS);
+  Yout << Val;
+  return Out;
+}
+
+TEST(MemProf, YAMLWriterFrame) {
+  Frame F(11, 22, 33, true);
+
+  std::string Out = serializeInYAML(F);
+  EXPECT_EQ(Out, R"YAML(---
+{ Function: 11, LineOffset: 22, Column: 33, Inline: true }
+...
+)YAML");
+}
+
+TEST(MemProf, YAMLWriterMIB) {
+  MemInfoBlock MIB;
+  MIB.AllocCount = 111;
+  MIB.TotalSize = 222;
+  MIB.TotalLifetime = 333;
+  MIB.TotalLifetimeAccessDensity = 444;
+  PortableMemInfoBlock PMIB(MIB, llvm::memprof::getHotColdSchema());
+
+  std::string Out = serializeInYAML(PMIB);
+  EXPECT_EQ(Out, R"YAML(---
+AllocCount:      111
+TotalSize:       222
+TotalLifetime:   333
+TotalLifetimeAccessDensity: 444
+...
+)YAML");
+}
 } // namespace