commit 2a610c7387664bc557a35ce3bb4c0d4df56e4755
author Devang Patel <dpatel@apple.com> Tue Aug 25 05:24:07 2009 +0000
committer Devang Patel <dpatel@apple.com> Tue Aug 25 05:24:07 2009 +0000
tree 48270c87c6b683ff972a9e35651d27e620881118
parent 4bda11fbdafc1d4fa97b7539bdf5a0f62ecfc280

Update DebugInfo interface to use metadata, instead of special named llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well.

This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79977 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 10f7b32..8016d7b 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1593,9 +1593,9 @@
   bool useLABEL = TLI.isOperationLegalOrCustom(ISD::DBG_LABEL, MVT::Other);
 
   const DbgStopPointSDNode *DSP = cast<DbgStopPointSDNode>(Node);
-  GlobalVariable *CU_GV = cast<GlobalVariable>(DSP->getCompileUnit());
-  if (DW && (useDEBUG_LOC || useLABEL) && !CU_GV->isDeclaration()) {
-    DICompileUnit CU(cast<GlobalVariable>(DSP->getCompileUnit()));
+  MDNode *CU_Node = DSP->getCompileUnit();
+  if (DW && (useDEBUG_LOC || useLABEL)) {
+    DICompileUnit CU(CU_Node);
 
     unsigned Line = DSP->getLine();
     unsigned Col = DSP->getColumn();
@@ -1607,7 +1607,7 @@
         return DAG.getNode(ISD::DEBUG_LOC, dl, MVT::Other, Node->getOperand(0),
                            DAG.getConstant(Line, MVT::i32),
                            DAG.getConstant(Col, MVT::i32),
-                           DAG.getSrcValue(CU.getGV()));
+                           DAG.getSrcValue(CU.getNode()));
       } else {
         unsigned ID = DW->RecordSourceLine(Line, Col, CU);
         return DAG.getLabel(ISD::DBG_LABEL, dl, Node->getOperand(0), ID);