[WebAssembly] Move checking of InputSegment comdat group earlier

This should also fixe an unused varaible warning in the realeae
build.

llvm-svn: 322440

1 files changed, 7 insertions, 0 deletions

diff --git a/lld/wasm/OutputSegment.h b/lld/wasm/OutputSegment.h
index 9825ce8e697..420d9744165 100644
--- a/lld/wasm/OutputSegment.h
+++ b/lld/wasm/OutputSegment.h
@@ -25,12 +25,18 @@ public:
 
   void addInputSegment(InputSegment *Segment) {
     Alignment = std::max(Alignment, Segment->getAlignment());
+    if (InputSegments.empty())
+      Comdat = Segment->getComdat();
+    else
+      assert(Comdat == Segment->getComdat());
     InputSegments.push_back(Segment);
     Size = llvm::alignTo(Size, Segment->getAlignment());
     Segment->setOutputSegment(this, Size);
     Size += Segment->getSize();
   }
 
+  StringRef getComdat() const { return Comdat; }
+
   uint32_t getSectionOffset() const { return SectionOffset; }
 
   void setSectionOffset(uint32_t Offset) { SectionOffset = Offset; }
@@ -47,6 +53,7 @@ public:
   std::string Header;
 
 private:
+  StringRef Comdat;
   uint32_t SectionOffset = 0;
 };