[CodeGenPrepare] Handle all debug calls in dupRetToEnableTailCallOpts()
This patch makes sure that a debug value that is after the bitcast in
dupRetToEnableTailCallOpts() is also skipped.
The reduced test case is from SPEC-2006 on SystemZ.
Review: Vedant Kumar, Wolfgang Pieb
https://reviews.llvm.org/D57050
llvm-svn: 352462
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 067f708..486290d 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -1845,10 +1845,8 @@
// return is the first instruction in the block.
if (PN) {
BasicBlock::iterator BI = BB->begin();
- do { ++BI; } while (isa<DbgInfoIntrinsic>(BI));
- if (&*BI == BCI)
- // Also skip over the bitcast.
- ++BI;
+ // Skip over debug and the bitcast.
+ do { ++BI; } while (isa<DbgInfoIntrinsic>(BI) || &*BI == BCI);
if (&*BI != RetI)
return false;
} else {