[DebugInfo] Only handle DBG_VALUE in InlineSpiller.

The instructions using registers should be DBG_VALUE and normal
instructions. Use isDebugValue() to filter out DBG_VALUE and add
an assert to ensure there is no other kind of debug instructions
using the registers.

Differential Revision: https://reviews.llvm.org/D46739

Patch by Hsiangkai Wang.

llvm-svn: 332427

1 files changed, 8 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/InlineSpiller.cpp b/llvm/lib/CodeGen/InlineSpiller.cpp
index 478ea9b2bc5..007e9283d83 100644
--- a/llvm/lib/CodeGen/InlineSpiller.cpp
+++ b/llvm/lib/CodeGen/InlineSpiller.cpp
@@ -617,9 +617,12 @@ void InlineSpiller::reMaterializeAll() {
       MachineInstr &MI = *RegI++;
 
       // Debug values are not allowed to affect codegen.
-      if (MI.isDebugInstr())
+      if (MI.isDebugValue())
         continue;
 
+      assert(!MI.isDebugInstr() && "Did not expect to find a use in debug "
+             "instruction that isn't a DBG_VALUE");
+
       anyRemat |= reMaterializeFor(LI, MI);
     }
   }
@@ -933,7 +936,7 @@ void InlineSpiller::spillAroundUses(unsigned Reg) {
     MachineInstr *MI = &*(RegI++);
 
     // Debug values are not allowed to affect codegen.
-    if (MI->isDebugInstr()) {
+    if (MI->isDebugValue()) {
       // Modify DBG_VALUE now that the value is in a spill slot.
       MachineBasicBlock *MBB = MI->getParent();
       LLVM_DEBUG(dbgs() << "Modifying debug info due to spill:\t" << *MI);
@@ -942,6 +945,9 @@ void InlineSpiller::spillAroundUses(unsigned Reg) {
       continue;
     }
 
+    assert(!MI->isDebugInstr() && "Did not expect to find a use in debug "
+           "instruction that isn't a DBG_VALUE");
+
     // Ignore copies to/from snippets. We'll delete them.
     if (SnippetCopies.count(MI))
       continue;