Don't instrument that! (#3176)

Co-authored-by: Jeff Noyle <[email protected]>
microsoft · Oct 1, 2020 · b0c029e · b0c029e
1 parent 7b5d547
commit b0c029e
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/lib/DxilPIXPasses/DxilDebugInstrumentation.cpp b/lib/DxilPIXPasses/DxilDebugInstrumentation.cpp
@@ -833,6 +833,18 @@ void DxilDebugInstrumentation::addStepDebugEntry(BuilderContext &BC,
     return;
   }
 
+  if (Inst->getOpcode() == Instruction::OtherOps::Call) {
+    if (Inst->getNumOperands() > 0) {
+      if (auto *asInt =
+              llvm::cast_or_null<llvm::ConstantInt>(Inst->getOperand(0))) {
+        if (asInt->getZExtValue() == (uint64_t)DXIL::OpCode::AllocateRayQuery) {
+          // Ray query handles should not be stored in the debug trace UAV
+          return;
+        }
+      }
+    }
+  }
+
   if (auto *St = llvm::dyn_cast<llvm::StoreInst>(Inst)) {
     addStoreStepDebugEntry(BC, St);
     return;