make sure to handle dbg_value instructions in the middle of the block, not

just at the head, when doing diamond if-conversion. rdar://7797940

llvm-svn: 106907

1 files changed, 10 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/IfConversion.cpp b/llvm/lib/CodeGen/IfConversion.cpp
index ea4e68dbdaf..51fea7f94e5 100644
--- a/llvm/lib/CodeGen/IfConversion.cpp
+++ b/llvm/lib/CodeGen/IfConversion.cpp
@@ -1228,10 +1228,18 @@ bool IfConverter::IfConvertDiamond(BBInfo &BBI, IfcvtKind Kind,
     ++DI2;
   BBI1->NonPredSize -= NumDups1;
   BBI2->NonPredSize -= NumDups1;
-  while (NumDups1 != 0) {
+  
+  // Skip past the dups on each side separately since there may be
+  // differing dbg_value entries.
+  for (unsigned i = 0; i < NumDups1; ++i) {
     ++DI1;
+    if (!DI1->isDebugValue())
+      ++i;
+  }
+  while (NumDups1 != 0) {
     ++DI2;
-    --NumDups1;
+    if (!DI2->isDebugValue())
+      --NumDups1;
   }
 
   UpdatePredRedefs(BBI1->BB->begin(), DI1, Redefs, TRI);