Use the MachineBasicBlock symbol for a callbr target

Summary:
Inline asm doesn't use labels when compiled as an object file. Therefore, we
shouldn't create one for the (potential) callbr destination. Instead, use the
symbol for the MachineBasicBlock.

Reviewers: nickdesaulniers, craig.topper

Reviewed By: nickdesaulniers

Subscribers: xbolva00, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64888

llvm-svn: 366523

1 files changed, 7 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
index 7721e996aca..59d3b7c8e55 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
@@ -430,8 +430,13 @@ static void EmitGCCInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
           if (Modifier[0] == 'l') { // Labels are target independent.
             if (MI->getOperand(OpNo).isBlockAddress()) {
               const BlockAddress *BA = MI->getOperand(OpNo).getBlockAddress();
-              MCSymbol *Sym = AP->GetBlockAddressSymbol(BA);
-              Sym->print(OS, AP->MAI);
+              const BasicBlock *BB = BA->getBasicBlock();
+              const MachineFunction *MF = MI->getParent()->getParent();
+              for (const MachineBasicBlock &MBB : *MF)
+                if (BB == MBB.getBasicBlock()) {
+                  MBB.getSymbol()->print(OS, AP->MAI);
+                  break;
+                }
             } else if (MI->getOperand(OpNo).isMBB()) {
               const MCSymbol *Sym = MI->getOperand(OpNo).getMBB()->getSymbol();
               Sym->print(OS, AP->MAI);