DebugInfo: Rewrite atSameLineAs() as MDLocation::canDiscriminate()

Rewrite `DILocation::atSameLineAs()` as `MDLocation::canDiscriminate()`
with a doxygen comment explaining its purpose.  I've added a few FIXMEs
where I think this check is too weak; fixing that is tracked by PR23199.

llvm-svn: 234674

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/Utils/AddDiscriminators.cpp b/llvm/lib/Transforms/Utils/AddDiscriminators.cpp
index 0379736f15d..e8f1d5c83c6 100644
--- a/llvm/lib/Transforms/Utils/AddDiscriminators.cpp
+++ b/llvm/lib/Transforms/Utils/AddDiscriminators.cpp
@@ -189,7 +189,7 @@ bool AddDiscriminators::runOnFunction(Function &F) {
       // location as B's last instruction (Last), add a new
       // discriminator for First's location and all the instructions
       // in Succ that share the same location with First.
-      if (FirstDIL.atSameLineAs(LastDIL)) {
+      if (!FirstDIL->canDiscriminate(*LastDIL)) {
         // Create a new lexical scope and compute a new discriminator
         // number for it.
         StringRef Filename = FirstDIL.getFilename();