1 files changed, 16 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 5859937..941e6a2 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -1889,11 +1889,24 @@ static MCSectionCOFF *getCOFFStaticStructorSection(MCContext &Ctx,
     // string that sorts between .CRT$XCA and .CRT$XCU. In the general case, we
     // make a name like ".CRT$XCT12345", since that runs before .CRT$XCU. Really
     // low priorities need to sort before 'L', since the CRT uses that
-    // internally, so we use ".CRT$XCA00001" for them.
+    // internally, so we use ".CRT$XCA00001" for them. We have a contract with
+    // the frontend that "init_seg(compiler)" corresponds to priority 200 and
+    // "init_seg(lib)" corresponds to priority 400, and those respectively use
+    // 'C' and 'L' without the priority suffix. Priorities between 200 and 400
+    // use 'C' with the priority as a suffix.
     SmallString<24> Name;
+    char LastLetter = 'T';
+    bool AddPrioritySuffix = Priority != 200 && Priority != 400;
+    if (Priority < 200)
+      LastLetter = 'A';
+    else if (Priority < 400)
+      LastLetter = 'C';
+    else if (Priority == 400)
+      LastLetter = 'L';
     raw_svector_ostream OS(Name);
-    OS << ".CRT$X" << (IsCtor ? "C" : "T") <<
-        (Priority < 200 ? 'A' : 'T') << format("%05u", Priority);
+    OS << ".CRT$X" << (IsCtor ? "C" : "T") << LastLetter;
+    if (AddPrioritySuffix)
+      OS << format("%05u", Priority);
     MCSectionCOFF *Sec = Ctx.getCOFFSection(
         Name, COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
         SectionKind::getReadOnly());