[CodeGen][NPM] Account inserted passes for -start/stop options

Author: vikramRH

llvm/include/llvm/Passes/CodeGenPassBuilder.h

@@ -579,8 +579,10 @@ template <typename DerivedT, typename TargetMachineT> class CodeGenPassBuilder {
   void insertPass(InsertedPassT &&Pass) const {
     AfterCallbacks.emplace_back(
         [&](StringRef Name, MachineFunctionPassManager &MFPM) mutable {
-          if (Name == TargetPassT::name())
-            MFPM.addPass(std::forward<InsertedPassT>(Pass));
+          if (Name == TargetPassT::name()) {
+            if (runBeforeAdding(InsertedPassT::name()))
+              MFPM.addPass(std::forward<InsertedPassT>(Pass));
+          }
         });
   }
 

llvm/test/tools/llc/new-pm/start-stop-inserted.ll

@@ -0,0 +1,15 @@
+; REQUIRES: amdgpu-registered-target
+
+; AMDGPU inserts the fourth instance of dead-mi-elimination pass after detect-dead-lanes
+; This checks that the pipeline stops before that.
+
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -O3 -enable-new-pm -stop-before=dead-mi-elimination,4 --print-pipeline-passes -filetype=null %s | FileCheck %s
+
+; There is no way to -start-after an inserted pass right now.
+; RUN: not llc -mtriple=amdgcn-amd-amdhsa -O3 -enable-new-pm -start-after=dead-mi-elimination,4 --print-pipeline-passes -filetype=null %s
+
+
+; CHECK: dead-mi-elimination
+; CHECK: dead-mi-elimination
+; CHECK: dead-mi-elimination
+; CHECK-NOT: dead-mi-elimination