Verifier: Verify that each inlinable callsite of a debug-info-bearing function

in a debug-info-bearing function has a debug location attached to it. Failure to
do so causes an "!dbg attachment points at wrong subprogram for function"
assertion failure when the inliner sets up inline scope info.

rdar://problem/25878916

This reaplies r267320 without changes after fixing an issue in the OpenMP IR
generator in clang.

llvm-svn: 267370

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 30f3715b08e..f8dd0823902 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -2579,6 +2579,15 @@ void Verifier::verifyCallSite(CallSite CS) {
     }
   }
 
+  // Verify that each inlinable callsite of a debug-info-bearing function in a
+  // debug-info-bearing function has a debug location attached to it. Failure to
+  // do so causes assertion failures when the inliner sets up inline scope info.
+  if (I->getFunction()->getSubprogram() && CS.getCalledFunction() &&
+      CS.getCalledFunction()->getSubprogram())
+    Assert(I->getDebugLoc(), "inlinable function call in a function with debug "
+                             "info must have a !dbg location",
+           I);
+
   visitInstruction(*I);
 }