[PATCH] D71120: [NFC][AIX][XCOFF] if the size of Csect is zero, the Csect do not need write any data into sections

[Digger via Phabricator via llvm-commits]

DiggerLin created this revision.
DiggerLin added reviewers: jasonliu, daltenty, sfertile, hubert.reinterpretcast.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

if the size of Csect is zero, the Csect do not need write any data into sections 
 for example, the TOC Csect has zero size, it do not need invoke a 
Asm.writeSectionData(W.OS, Csect.MCCsect, Layout);


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71120

Files:
  llvm/lib/MC/XCOFFObjectWriter.cpp


Index: llvm/lib/MC/XCOFFObjectWriter.cpp
===================================================================
--- llvm/lib/MC/XCOFFObjectWriter.cpp
+++ llvm/lib/MC/XCOFFObjectWriter.cpp
@@ -368,7 +368,8 @@
       for (const auto &Csect : *Group) {
         if (uint32_t PaddingSize = Csect.Address - CurrentAddressLocation)
           W.OS.write_zeros(PaddingSize);
-        Asm.writeSectionData(W.OS, Csect.MCCsect, Layout);
+        if (Csect.Size)
+          Asm.writeSectionData(W.OS, Csect.MCCsect, Layout);
         CurrentAddressLocation = Csect.Address + Csect.Size;
       }
     }


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