Remove MachineFunction's DefaultDebugLoc member, and make DwarfDebug.cpp
responsible for figuring out what that's supposed to be on its own.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101844 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 23f08f1..684a409 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2283,6 +2283,21 @@
}
}
+/// FindFirstDebugLoc - Find the first debug location in the function. This
+/// is intended to be an approximation for the source position of the
+/// beginning of the function.
+static DebugLoc FindFirstDebugLoc(const MachineFunction *MF) {
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ I != E; ++I)
+ for (MachineBasicBlock::const_iterator MBBI = I->begin(), MBBE = I->end();
+ MBBI != MBBE; ++MBBI) {
+ DebugLoc DL = MBBI->getDebugLoc();
+ if (!DL.isUnknown())
+ return DL;
+ }
+ return DebugLoc();
+}
+
/// beginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
void DwarfDebug::beginFunction(const MachineFunction *MF) {
@@ -2297,7 +2312,7 @@
// Emit label for the implicitly defined dbg.stoppoint at the start of the
// function.
- DebugLoc FDL = MF->getDefaultDebugLoc();
+ DebugLoc FDL = FindFirstDebugLoc(MF);
if (FDL.isUnknown()) return;
MDNode *Scope = FDL.getScope(MF->getFunction()->getContext());