[CodeGen] Fix bugs in BranchFolderPass when debug labels are generated.

Skip DBG_VALUE and DBG_LABEL in branch folding algorithms.

The bug is reported in
https://bugs.chromium.org/p/chromium/issues/detail?id=898160.

Differential Revision: https://reviews.llvm.org/D54199

llvm-svn: 347964

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/lib/CodeGen/BranchFolding.cpp b/llvm/lib/CodeGen/BranchFolding.cpp
index fa027eedd4d..efbfd5f4ab2 100644
--- a/llvm/lib/CodeGen/BranchFolding.cpp
+++ b/llvm/lib/CodeGen/BranchFolding.cpp
@@ -298,7 +298,7 @@ static unsigned HashEndOfMBB(const MachineBasicBlock &MBB) {
 
 ///  Whether MI should be counted as an instruction when calculating common tail.
 static bool countsAsInstruction(const MachineInstr &MI) {
-  return !(MI.isDebugValue() || MI.isCFIInstruction());
+  return !(MI.isDebugInstr() || MI.isCFIInstruction());
 }
 
 /// ComputeCommonTailLength - Given two machine basic blocks, compute the number
@@ -1363,9 +1363,9 @@ static void copyDebugInfoToPredecessor(const TargetInstrInfo *TII,
                                        MachineBasicBlock &PredMBB) {
   auto InsertBefore = PredMBB.getFirstTerminator();
   for (MachineInstr &MI : MBB.instrs())
-    if (MI.isDebugValue()) {
+    if (MI.isDebugInstr()) {
       TII->duplicate(PredMBB, InsertBefore, MI);
-      LLVM_DEBUG(dbgs() << "Copied debug value from empty block to pred: "
+      LLVM_DEBUG(dbgs() << "Copied debug entity from empty block to pred: "
                         << MI);
     }
 }
@@ -1375,9 +1375,9 @@ static void copyDebugInfoToSuccessor(const TargetInstrInfo *TII,
                                      MachineBasicBlock &SuccMBB) {
   auto InsertBefore = SuccMBB.SkipPHIsAndLabels(SuccMBB.begin());
   for (MachineInstr &MI : MBB.instrs())
-    if (MI.isDebugValue()) {
+    if (MI.isDebugInstr()) {
       TII->duplicate(SuccMBB, InsertBefore, MI);
-      LLVM_DEBUG(dbgs() << "Copied debug value from empty block to succ: "
+      LLVM_DEBUG(dbgs() << "Copied debug entity from empty block to succ: "
                         << MI);
     }
 }