[PATCH] D77429: [AsmPrinter] Do not define local aliases for global objects in a comdat

[Leonard Chan via Phabricator via llvm-commits]

leonardchan updated this revision to Diff 255452.
leonardchan marked an inline comment as done.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77429/new/

https://reviews.llvm.org/D77429

Files:
  llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  llvm/test/CodeGen/X86/semantic-interposition-comdat.ll


Index: llvm/test/CodeGen/X86/semantic-interposition-comdat.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/X86/semantic-interposition-comdat.ll
@@ -0,0 +1,23 @@
+; RUN: llc -mtriple x86_64-unknown-linux-gnu %s -o - | FileCheck %s
+
+$comdat_func = comdat any
+
+; CHECK-LABEL: func2:
+; CHECK-NEXT: .Lfunc2$local
+
+declare void @func()
+
+define hidden void @func2() {
+entry:
+  call void @func()
+  ret void
+}
+
+; CHECK: comdat_func:
+; CHECK-NOT: .Lcomdat_func$local
+
+define hidden void @comdat_func() comdat {
+entry:
+  call void @func()
+  ret void
+}
Index: llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
===================================================================
--- llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -460,7 +460,7 @@
   // assumed it.
   if (TM.getTargetTriple().isOSBinFormatELF() &&
       GlobalObject::isExternalLinkage(GV.getLinkage()) && GV.isDSOLocal() &&
-      !GV.isDeclaration() && !isa<GlobalIFunc>(GV))
+      !GV.isDeclaration() && !isa<GlobalIFunc>(GV) && !GV.hasComdat())
     return getSymbolWithGlobalValueBase(&GV, "$local");
   return TM.getSymbol(&GV);
 }


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