diff --git a/lib/Target/WebAssembly/CMakeLists.txt b/lib/Target/WebAssembly/CMakeLists.txt
index 549229a..c814287 100644
--- a/lib/Target/WebAssembly/CMakeLists.txt
+++ b/lib/Target/WebAssembly/CMakeLists.txt
@@ -47,7 +47,7 @@
   WebAssemblyRuntimeLibcallSignatures.cpp
   WebAssemblySelectionDAGInfo.cpp
   WebAssemblySetP2AlignOperands.cpp
-  WebAssemblyStoreResults.cpp
+  WebAssemblyMemIntrinsicResults.cpp
   WebAssemblySubtarget.cpp
   WebAssemblyTargetMachine.cpp
   WebAssemblyTargetObjectFile.cpp
diff --git a/lib/Target/WebAssembly/README.txt b/lib/Target/WebAssembly/README.txt
index 51f341e..a154b4b 100644
--- a/lib/Target/WebAssembly/README.txt
+++ b/lib/Target/WebAssembly/README.txt
@@ -94,10 +94,10 @@
 //===---------------------------------------------------------------------===//
 
 Instead of the OptimizeReturned pass, which should consider preserving the
-"returned" attribute through to MachineInstrs and extending the StoreResults
-pass to do this optimization on calls too. That would also let the
-WebAssemblyPeephole pass clean up dead defs for such calls, as it does for
-stores.
+"returned" attribute through to MachineInstrs and extending the
+MemIntrinsicResults pass to do this optimization on calls too. That would also
+let the WebAssemblyPeephole pass clean up dead defs for such calls, as it does
+for stores.
 
 //===---------------------------------------------------------------------===//
 
diff --git a/lib/Target/WebAssembly/WebAssembly.h b/lib/Target/WebAssembly/WebAssembly.h
index 87975ca..45145c0 100644
--- a/lib/Target/WebAssembly/WebAssembly.h
+++ b/lib/Target/WebAssembly/WebAssembly.h
@@ -43,7 +43,7 @@
 FunctionPass *createWebAssemblyReplacePhysRegs();
 FunctionPass *createWebAssemblyPrepareForLiveIntervals();
 FunctionPass *createWebAssemblyOptimizeLiveIntervals();
-FunctionPass *createWebAssemblyStoreResults();
+FunctionPass *createWebAssemblyMemIntrinsicResults();
 FunctionPass *createWebAssemblyRegStackify();
 FunctionPass *createWebAssemblyRegColoring();
 FunctionPass *createWebAssemblyExplicitLocals();
@@ -68,7 +68,7 @@
 void initializeWebAssemblyReplacePhysRegsPass(PassRegistry &);
 void initializeWebAssemblyPrepareForLiveIntervalsPass(PassRegistry &);
 void initializeWebAssemblyOptimizeLiveIntervalsPass(PassRegistry &);
-void initializeWebAssemblyStoreResultsPass(PassRegistry &);
+void initializeWebAssemblyMemIntrinsicResultsPass(PassRegistry &);
 void initializeWebAssemblyRegStackifyPass(PassRegistry &);
 void initializeWebAssemblyRegColoringPass(PassRegistry &);
 void initializeWebAssemblyExplicitLocalsPass(PassRegistry &);
diff --git a/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp b/lib/Target/WebAssembly/WebAssemblyMemIntrinsicResults.cpp
similarity index 74%
rename from lib/Target/WebAssembly/WebAssemblyStoreResults.cpp
rename to lib/Target/WebAssembly/WebAssemblyMemIntrinsicResults.cpp
index fba1735..c4b5e96 100644
--- a/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyMemIntrinsicResults.cpp
@@ -1,4 +1,4 @@
-//===-- WebAssemblyStoreResults.cpp - Optimize using store result values --===//
+//== WebAssemblyMemIntrinsicResults.cpp - Optimize memory intrinsic results ==//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -8,19 +8,22 @@
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// This file implements an optimization pass using store result values.
+/// This file implements an optimization pass using memory intrinsic results.
 ///
-/// WebAssembly's store instructions return the stored value. This is to enable
-/// an optimization wherein uses of the stored value can be replaced by uses of
-/// the store's result value, making the stored value register more likely to
-/// be single-use, thus more likely to be useful to register stackifying, and
-/// potentially also exposing the store to register stackifying. These both can
-/// reduce local.get/local.set traffic.
+/// Calls to memory intrinsics (memcpy, memmove, memset) return the destination
+/// address. They are in the form of
+///   %dst_new = call @memcpy %dst, %src, %len
+/// where %dst and %dst_new registers contain the same value.
 ///
-/// This pass also performs this optimization for memcpy, memmove, and memset
-/// calls, since the LLVM intrinsics for these return void so they can't use the
-/// returned attribute and consequently aren't handled by the OptimizeReturned
-/// pass.
+/// This is to enable an optimization wherein uses of the %dst register used in
+/// the parameter can be replaced by uses of the %dst_new register used in the
+/// result, making the %dst register more likely to be single-use, thus more
+/// likely to be useful to register stackifying, and potentially also exposing
+/// the call instruction itself to register stackifying. These both can reduce
+/// local.get/local.set traffic.
+///
+/// The LLVM intrinsics for these return void so they can't use the returned
+/// attribute and consequently aren't handled by the OptimizeReturned pass.
 ///
 //===----------------------------------------------------------------------===//
 
@@ -38,15 +41,17 @@
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
-#define DEBUG_TYPE "wasm-store-results"
+#define DEBUG_TYPE "wasm-mem-intrinsic-results"
 
 namespace {
-class WebAssemblyStoreResults final : public MachineFunctionPass {
+class WebAssemblyMemIntrinsicResults final : public MachineFunctionPass {
 public:
   static char ID; // Pass identification, replacement for typeid
-  WebAssemblyStoreResults() : MachineFunctionPass(ID) {}
+  WebAssemblyMemIntrinsicResults() : MachineFunctionPass(ID) {}
 
-  StringRef getPassName() const override { return "WebAssembly Store Results"; }
+  StringRef getPassName() const override {
+    return "WebAssembly Memory Intrinsic Results";
+  }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.setPreservesCFG();
@@ -67,12 +72,13 @@
 };
 } // end anonymous namespace
 
-char WebAssemblyStoreResults::ID = 0;
-INITIALIZE_PASS(WebAssemblyStoreResults, DEBUG_TYPE,
-                "Optimize store result values for WebAssembly", false, false)
+char WebAssemblyMemIntrinsicResults::ID = 0;
+INITIALIZE_PASS(WebAssemblyMemIntrinsicResults, DEBUG_TYPE,
+                "Optimize memory intrinsic result values for WebAssembly",
+                false, false)
 
-FunctionPass *llvm::createWebAssemblyStoreResults() {
-  return new WebAssemblyStoreResults();
+FunctionPass *llvm::createWebAssemblyMemIntrinsicResults() {
+  return new WebAssemblyMemIntrinsicResults();
 }
 
 // Replace uses of FromReg with ToReg if they are dominated by MI.
@@ -164,14 +170,14 @@
   unsigned FromReg = MI.getOperand(2).getReg();
   unsigned ToReg = MI.getOperand(0).getReg();
   if (MRI.getRegClass(FromReg) != MRI.getRegClass(ToReg))
-    report_fatal_error("Store results: call to builtin function with wrong "
-                       "signature, from/to mismatch");
+    report_fatal_error("Memory Intrinsic results: call to builtin function "
+                       "with wrong signature, from/to mismatch");
   return ReplaceDominatedUses(MBB, MI, FromReg, ToReg, MRI, MDT, LIS);
 }
 
-bool WebAssemblyStoreResults::runOnMachineFunction(MachineFunction &MF) {
+bool WebAssemblyMemIntrinsicResults::runOnMachineFunction(MachineFunction &MF) {
   LLVM_DEBUG({
-    dbgs() << "********** Store Results **********\n"
+    dbgs() << "********** Memory Intrinsic Results **********\n"
            << "********** Function: " << MF.getName() << '\n';
   });
 
@@ -186,7 +192,8 @@
   // We don't preserve SSA form.
   MRI.leaveSSA();
 
-  assert(MRI.tracksLiveness() && "StoreResults expects liveness tracking");
+  assert(MRI.tracksLiveness() &&
+         "MemIntrinsicResults expects liveness tracking");
 
   for (auto &MBB : MF) {
     LLVM_DEBUG(dbgs() << "Basic Block: " << MBB.getName() << '\n');
diff --git a/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index db8cd81..3bf8dd4 100644
--- a/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -62,7 +62,7 @@
   initializeWebAssemblyReplacePhysRegsPass(PR);
   initializeWebAssemblyPrepareForLiveIntervalsPass(PR);
   initializeWebAssemblyOptimizeLiveIntervalsPass(PR);
-  initializeWebAssemblyStoreResultsPass(PR);
+  initializeWebAssemblyMemIntrinsicResultsPass(PR);
   initializeWebAssemblyRegStackifyPass(PR);
   initializeWebAssemblyRegColoringPass(PR);
   initializeWebAssemblyExplicitLocalsPass(PR);
@@ -311,13 +311,14 @@
     // Depend on LiveIntervals and perform some optimizations on it.
     addPass(createWebAssemblyOptimizeLiveIntervals());
 
-    // Prepare store instructions for register stackifying.
-    addPass(createWebAssemblyStoreResults());
+    // Prepare memory intrinsic calls for register stackifying.
+    addPass(createWebAssemblyMemIntrinsicResults());
 
     // Mark registers as representing wasm's value stack. This is a key
     // code-compression technique in WebAssembly. We run this pass (and
-    // StoreResults above) very late, so that it sees as much code as possible,
-    // including code emitted by PEI and expanded by late tail duplication.
+    // MemIntrinsicResults above) very late, so that it sees as much code as
+    // possible, including code emitted by PEI and expanded by late tail
+    // duplication.
     addPass(createWebAssemblyRegStackify());
 
     // Run the register coloring pass to reduce the total number of registers.
diff --git a/test/DebugInfo/WebAssembly/dbg-value-live-interval.ll b/test/DebugInfo/WebAssembly/dbg-value-live-interval.ll
index 1754d2a..c43678e 100644
--- a/test/DebugInfo/WebAssembly/dbg-value-live-interval.ll
+++ b/test/DebugInfo/WebAssembly/dbg-value-live-interval.ll
@@ -4,7 +4,7 @@
 ; CHECK: bb.3.for.body.for.body_crit_edge:
 ; CHECK: [[REG:%[0-9]+]]:i32 = nsw ADD_I32 {{.*}} fib.c:7:7
 ; CHECK: DBG_VALUE [[REG]]:i32, $noreg, !"a", {{.*}} fib.c:5:13
-; CHECK: After WebAssembly Store Results:
+; CHECK: After WebAssembly Memory Intrinsic Results:
 
 ; ModuleID = 'fib.bc'
 source_filename = "fib.c"