diff --git a/llvm/unittests/Transforms/Utils/CodeExtractorTest.cpp b/llvm/unittests/Transforms/Utils/CodeExtractorTest.cpp
--- a/llvm/unittests/Transforms/Utils/CodeExtractorTest.cpp
+++ b/llvm/unittests/Transforms/Utils/CodeExtractorTest.cpp
@@ -8,6 +8,7 @@
 
 #include "llvm/Transforms/Utils/CodeExtractor.h"
 #include "llvm/AsmParser/Parser.h"
+#include "llvm/Analysis/AssumptionCache.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/Instructions.h"
@@ -225,4 +226,55 @@
   EXPECT_FALSE(verifyFunction(*Func));
 }
 
+TEST(CodeExtractor, ExtractAndInvalidateAssumptionCache) {
+  LLVMContext Ctx;
+  SMDiagnostic Err;
+  std::unique_ptr<Module> M(parseAssemblyString(
+        "target datalayout = \"e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128\" "
+        "target triple = \"aarch64\" "
+        " "
+        "%b = type { i64 } "
+        "declare void @g(i8*) "
+        " "
+        "declare void @llvm.assume(i1) #0 "
+        " "
+        "define void @test() { "
+        "entry: "
+        "  br label %label "
+        " "
+        "label: "
+        "  %0 = load %b*, %b** inttoptr (i64 8 to %b**), align 8 "
+        "  %1 = getelementptr inbounds %b, %b* %0, i64 undef, i32 0 "
+        "  %2 = load i64, i64* %1, align 8 "
+        "  %3 = icmp ugt i64 %2, 1 "
+        "  br i1 %3, label %if.then, label %if.else "
+        " "
+        "if.then: "
+        "  unreachable "
+        " "
+        "if.else: "
+        "  call void @g(i8* undef) "
+        "  store i64 undef, i64* null, align 536870912 "
+        "  %4 = icmp eq i64 %2, 0 "
+        "  call void @llvm.assume(i1 %4) "
+        "  unreachable "
+        "}"
+        " "
+        "attributes #0 = { nounwind willreturn } "
+        " ",
+        Err, Ctx));
+
+  assert(M && "Could not parse module?");
+  Function *Func = M->getFunction("test");
+  SmallVector<BasicBlock *, 1> Blocks{ getBlockByName(Func, "if.else") };
+  AssumptionCache AC(*Func);
+  CodeExtractor CE(Blocks, nullptr, false, nullptr, nullptr, &AC);
+  EXPECT_TRUE(CE.isEligible());
+
+  Function *Outlined = CE.extractCodeRegion();
+  EXPECT_TRUE(Outlined);
+  EXPECT_FALSE(verifyFunction(*Outlined));
+  EXPECT_FALSE(verifyFunction(*Func));
+  EXPECT_FALSE(CE.verifyAssumptionCache(*Func, &AC));
+}
 } // end anonymous namespace