Accept getelementptr starting at GV with all 0 indices as a

legitimate way of representing global variable GV in debug info.

llvm-svn: 46565

1 files changed, 14 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineModuleInfo.cpp b/llvm/lib/CodeGen/MachineModuleInfo.cpp
index 8aa4c4456ac..c1823947b1d 100644
--- a/llvm/lib/CodeGen/MachineModuleInfo.cpp
+++ b/llvm/lib/CodeGen/MachineModuleInfo.cpp
@@ -104,6 +104,13 @@ static GlobalVariable *getGlobalVariable(Value *V) {
   } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
     if (CE->getOpcode() == Instruction::BitCast) {
       return dyn_cast<GlobalVariable>(CE->getOperand(0));
+    } else if (CE->getOpcode() == Instruction::GetElementPtr) {
+      for (unsigned int i=1; i<CE->getNumOperands(); i++) {
+        Constant* CI = cast<Constant>(CE->getOperand(i));
+        if (!CI || !CI->isNullValue())
+          return NULL;
+      }
+      return dyn_cast<GlobalVariable>(CE->getOperand(0));
     }
   }
   return NULL;
@@ -117,6 +124,13 @@ static bool isGlobalVariable(Value *V) {
   } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
     if (CE->getOpcode() == Instruction::BitCast) {
       return isa<GlobalVariable>(CE->getOperand(0));
+    } else if (CE->getOpcode() == Instruction::GetElementPtr) {
+      for (unsigned int i=1; i<CE->getNumOperands(); i++) {
+        Constant* CI = cast<Constant>(CE->getOperand(i));
+        if (!CI || !CI->isNullValue())
+          return false;
+      }
+      return isa<GlobalVariable>(CE->getOperand(0));
     }
   }
   return false;