Avoid symbol name clash when filling TOC.

Patch by Adhemerval Zanella.

llvm-svn: 164141

1 files changed, 8 insertions, 3 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
index ee35ee5a5bc..a66677fa0fe 100644
--- a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -368,9 +368,14 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
     else if (MO.isJTI())
       MOSymbol = GetJTISymbol(MO.getIndex());
     MCSymbol *&TOCEntry = TOC[MOSymbol];
-    if (TOCEntry == 0)
-      TOCEntry = GetTempSymbol("C", TOCLabelID++);
-    
+    // To avoid name clash check if the name already exists.
+    while (TOCEntry == 0) {
+      if (OutContext.LookupSymbol(Twine(MAI->getPrivateGlobalPrefix()) +
+                                  "C" + Twine(TOCLabelID++)) == 0) {
+        TOCEntry = GetTempSymbol("C", TOCLabelID);
+      }
+    }
+
     const MCExpr *Exp =
       MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC_ENTRY,
                               OutContext);