[XCOFF] Enable available_externally linkage for functions.

Summary: D80642 added support for emitting AvailableExternally Linkage on AIX. However, an assertion of "Trying to get csect representation of this symbol but none was set." occurred when a function is declared as available_externally. This is due to we missing to generate a csect for the function. This patch fixes it.

Reviewed By: hubert.reinterpretcast, shchenz

Differential Revision: https://reviews.llvm.org/D156213

Signed-off-by: Esme Yi <esme.yi@ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 3994552..647f570 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -2628,12 +2628,12 @@ MCSymbol *TargetLoweringObjectFileXCOFF::getFunctionEntryPointSymbol(
   // function entry point csect instead. And for function delcarations, the
   // undefined symbols gets treated as csect with XTY_ER property.
   if (((TM.getFunctionSections() && !Func->hasSection()) ||
-       Func->isDeclaration()) &&
+       Func->isDeclarationForLinker()) &&
       isa<Function>(Func)) {
     return getContext()
         .getXCOFFSection(
             NameStr, SectionKind::getText(),
-            XCOFF::CsectProperties(XCOFF::XMC_PR, Func->isDeclaration()
+            XCOFF::CsectProperties(XCOFF::XMC_PR, Func->isDeclarationForLinker()
                                                       ? XCOFF::XTY_ER
                                                       : XCOFF::XTY_SD))
         ->getQualNameSymbol();