diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -26963,6 +26963,9 @@
                          DAG.getConstant(0, dl, MVT::i32),
                          DAG.getConstant(0, dl, MVT::i32));
     }
+    // Sanitizer memory access check.
+    case llvm::Intrinsic::x86_asan_check_memaccess:
+    // Flags read/write.
     case llvm::Intrinsic::x86_flags_read_u32:
     case llvm::Intrinsic::x86_flags_read_u64:
     case llvm::Intrinsic::x86_flags_write_u32:
diff --git a/llvm/test/CodeGen/X86/asan-check-memaccess-add.ll b/llvm/test/CodeGen/X86/asan-check-memaccess-add.ll
--- a/llvm/test/CodeGen/X86/asan-check-memaccess-add.ll
+++ b/llvm/test/CodeGen/X86/asan-check-memaccess-add.ll
@@ -3,49 +3,64 @@
 target triple = "x86_64-unknown-linux-gnu"
 
 define void @load1(i8* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load1_rn[[RN1:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store1_rn[[RN1]]
+; CHECK:              popq    %rbp
   call void @llvm.x86.asan.check.memaccess(i8* %x, i32 0)
   call void @llvm.x86.asan.check.memaccess(i8* %x, i32 32)
   ret void
 }
 
 define void @load2(i16* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load2_rn[[RN2:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store2_rn[[RN2]]
   %1 = ptrtoint i16* %x to i64
   %2 = bitcast i16* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 2)
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 34)
+; CHECK:              popq    %rbp
   ret void
 }
 
 define void @load4(i32* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load4_rn[[RN4:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store4_rn[[RN4]]
   %1 = ptrtoint i32* %x to i64
   %2 = bitcast i32* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 4)
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 36)
+; CHECK:              popq    %rbp
   ret void
 }
 define void @load8(i64* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load8_rn[[RN8:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store8_rn[[RN8]]
   %1 = ptrtoint i64* %x to i64
   %2 = bitcast i64* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 6)
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 38)
+; CHECK:              popq    %rbp
   ret void
 }
 
 define void @load16(i128* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load16_rn[[RN16:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store16_rn[[RN16]]
   %1 = ptrtoint i128* %x to i64
   %2 = bitcast i128* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 8)
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 40)
+; CHECK:              popq    %rbp
   ret void
 }
 
diff --git a/llvm/test/CodeGen/X86/asan-check-memaccess-or.ll b/llvm/test/CodeGen/X86/asan-check-memaccess-or.ll
--- a/llvm/test/CodeGen/X86/asan-check-memaccess-or.ll
+++ b/llvm/test/CodeGen/X86/asan-check-memaccess-or.ll
@@ -3,16 +3,22 @@
 target triple = "x86_64-pc-win"
 
 define void @load1(i8* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load1_rn[[RN1:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store1_rn[[RN1]]
+; CHECK:              popq    %rbp
   call void @llvm.x86.asan.check.memaccess(i8* %x, i32 0)
   call void @llvm.x86.asan.check.memaccess(i8* %x, i32 32)
   ret void
 }
 
 define void @load2(i16* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load2_rn[[RN2:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store2_rn[[RN2]]
+; CHECK:              popq    %rbp
   %1 = ptrtoint i16* %x to i64
   %2 = bitcast i16* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 2)
@@ -21,8 +27,11 @@
 }
 
 define void @load4(i32* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load4_rn[[RN4:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store4_rn[[RN4]]
+; CHECK:              popq    %rbp
   %1 = ptrtoint i32* %x to i64
   %2 = bitcast i32* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 4)
@@ -30,8 +39,11 @@
   ret void
 }
 define void @load8(i64* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load8_rn[[RN8:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store8_rn[[RN8]]
+; CHECK:              popq    %rbp
   %1 = ptrtoint i64* %x to i64
   %2 = bitcast i64* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 6)
@@ -40,8 +52,11 @@
 }
 
 define void @load16(i128* nocapture readonly %x) {
+; CHECK:              pushq   %rbp
+; CHECK:              movq    %rsp, %rbp
 ; CHECK:              callq   __asan_check_load16_rn[[RN16:.*]]
 ; CHECK-NEXT:         callq   __asan_check_store16_rn[[RN16]]
+; CHECK:              popq    %rbp
   %1 = ptrtoint i128* %x to i64
   %2 = bitcast i128* %x to i8*
   call void @llvm.x86.asan.check.memaccess(i8* %2, i32 8)