DebugInfo: Don't include locations for debug-having code inlined into nodebug functions

This produced 'strange' DWARF anyway - the CU would have no ranges (or
at least not a range including the inlined code) nor any subprogram or
inlined_subroutine - yet the line table would have entries for these
instructions.

(this actually becomes more relevant with changes coming after this,
where a CU without any contents will be omitted entirely - so there
would be no line table to put this on anyway)

llvm-svn: 304004

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index b696312fd28..3ea4c1c2775 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1036,6 +1036,10 @@ void DwarfDebug::beginInstruction(const MachineInstr *MI) {
   DebugHandlerBase::beginInstruction(MI);
   assert(CurMI);
 
+  const auto *SP = MI->getParent()->getParent()->getFunction()->getSubprogram();
+  if (!SP || SP->getUnit()->getEmissionKind() == DICompileUnit::NoDebug)
+    return;
+
   // Check if source location changes, but ignore DBG_VALUE and CFI locations.
   if (MI->isMetaInstruction())
     return;