[gn build] Port b4ba3fe

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn

@@ -138,6 +138,7 @@ static_library("LLVMAMDGPUCodeGen") {
     "AMDGPUAtomicOptimizer.cpp",
     "AMDGPUAttributor.cpp",
     "AMDGPUCallLowering.cpp",
+    "AMDGPUCodeGenPassBuilder.cpp",
     "AMDGPUCodeGenPrepare.cpp",
     "AMDGPUCombinerHelper.cpp",
     "AMDGPUCtorDtorLowering.cpp",
@@ -206,6 +207,7 @@ static_library("LLVMAMDGPUCodeGen") {
     "GCNVOPDUtils.cpp",
     "R600AsmPrinter.cpp",
     "R600ClauseMergePass.cpp",
+    "R600CodeGenPassBuilder.cpp",
     "R600ControlFlowFinalizer.cpp",
     "R600EmitClauseMarkers.cpp",
     "R600ExpandSpecialInstrs.cpp",