[CSSPGO] Exclude pseudo probes from slot index

Pseudo probe are currently given a slot index like other regular instructions. This affects register pressure and lifetime weight computation because of enlarged lifetime length with pseudo probe instructions. As a consequence, program could get different code generated w/ and w/o pseudo probes. I'm closing the gap by excluding pseudo probes from stack index and downstream register allocation related passes.

Reviewed By: wmi

Differential Revision: https://reviews.llvm.org/D100334

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/LiveVariables.cpp b/llvm/lib/CodeGen/LiveVariables.cpp
index e0ef38d..7181dbc 100644
--- a/llvm/lib/CodeGen/LiveVariables.cpp
+++ b/llvm/lib/CodeGen/LiveVariables.cpp
@@ -497,7 +497,7 @@ void LiveVariables::UpdatePhysRegDefs(MachineInstr &MI,
 
 void LiveVariables::runOnInstr(MachineInstr &MI,
                                SmallVectorImpl<unsigned> &Defs) {
-  assert(!MI.isDebugInstr());
+  assert(!MI.isDebugOrPseudoInstr());
   // Process all of the operands of the instruction...
   unsigned NumOperandsToProcess = MI.getNumOperands();
 
@@ -572,7 +572,7 @@ void LiveVariables::runOnBlock(MachineBasicBlock *MBB, const unsigned NumRegs) {
   DistanceMap.clear();
   unsigned Dist = 0;
   for (MachineInstr &MI : *MBB) {
-    if (MI.isDebugInstr())
+    if (MI.isDebugOrPseudoInstr())
       continue;
     DistanceMap.insert(std::make_pair(&MI, Dist++));