diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/BUILD.gn
index 055f2ae5aaae0..d030c5e040098 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/BUILD.gn
@@ -30,6 +30,15 @@ tablegen("MipsGenMCPseudoLowering") {
   td_file = "Mips.td"
 }
 
+tablegen("MipsGenPostLegalizeGICombiner") {
+  visibility = [ ":LLVMMipsCodeGen" ]
+  args = [
+    "-gen-global-isel-combiner",
+    "-combiners=MipsPostLegalizerCombinerHelper",
+  ]
+  td_file = "Mips.td"
+}
+
 tablegen("MipsGenRegisterBank") {
   visibility = [ ":LLVMMipsCodeGen" ]
   args = [ "-gen-register-bank" ]
@@ -43,6 +52,7 @@ static_library("LLVMMipsCodeGen") {
     ":MipsGenFastISel",
     ":MipsGenGlobalISel",
     ":MipsGenMCPseudoLowering",
+    ":MipsGenPostLegalizeGICombiner",
     ":MipsGenRegisterBank",
     "MCTargetDesc",
     "TargetInfo",
@@ -88,6 +98,7 @@ static_library("LLVMMipsCodeGen") {
     "MipsMulMulBugPass.cpp",
     "MipsOptimizePICCall.cpp",
     "MipsOs16.cpp",
+    "MipsPostLegalizerCombiner.cpp",
     "MipsPreLegalizerCombiner.cpp",
     "MipsRegisterBankInfo.cpp",
     "MipsRegisterInfo.cpp",