[DebugInfo] Examine all uses of isDebugValue() for debug instructions.

Because we create a new kind of debug instruction, DBG_LABEL, we need to
check all passes which use isDebugValue() to check MachineInstr is debug
instruction or not. When expelling debug instructions, we should expel
both DBG_VALUE and DBG_LABEL. So, I create a new function,
isDebugInstr(), in MachineInstr to check whether the MachineInstr is
debug instruction or not.

This patch has no new test case. I have run regression test and there is
no difference in regression test.

Differential Revision: https://reviews.llvm.org/D45342

Patch by Hsiangkai Wang.

llvm-svn: 331844

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/RegisterScavenging.cpp b/llvm/lib/CodeGen/RegisterScavenging.cpp
index 97967124add..9fa14c9dc5e 100644
--- a/llvm/lib/CodeGen/RegisterScavenging.cpp
+++ b/llvm/lib/CodeGen/RegisterScavenging.cpp
@@ -111,7 +111,7 @@ void RegScavenger::determineKillsAndDefs() {
   assert(Tracking && "Must be tracking to determine kills and defs");
 
   MachineInstr &MI = *MBBI;
-  assert(!MI.isDebugValue() && "Debug values have no kills or defs");
+  assert(!MI.isDebugInstr() && "Debug values have no kills or defs");
 
   // Find out which registers are early clobbered, killed, defined, and marked
   // def-dead in this instruction.
@@ -158,7 +158,7 @@ void RegScavenger::unprocess() {
   assert(Tracking && "Cannot unprocess because we're not tracking");
 
   MachineInstr &MI = *MBBI;
-  if (!MI.isDebugValue()) {
+  if (!MI.isDebugInstr()) {
     determineKillsAndDefs();
 
     // Commit the changes.
@@ -195,7 +195,7 @@ void RegScavenger::forward() {
     I->Restore = nullptr;
   }
 
-  if (MI.isDebugValue())
+  if (MI.isDebugInstr())
     return;
 
   determineKillsAndDefs();
@@ -318,7 +318,7 @@ unsigned RegScavenger::findSurvivorReg(MachineBasicBlock::iterator StartMI,
 
   bool inVirtLiveRange = false;
   for (++MI; InstrLimit > 0 && MI != ME; ++MI, --InstrLimit) {
-    if (MI->isDebugValue()) {
+    if (MI->isDebugInstr()) {
       ++InstrLimit; // Don't count debug instructions
       continue;
     }