Index: mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td
===================================================================
--- mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td
+++ mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td
@@ -168,16 +168,34 @@
   let arguments = (ins LLVM_Type, LLVM_Type);
 }

+// Saturation Arithmetic Intrinsics.
+
+def LLVM_SAddSat
+    : LLVM_IntrOp<"sadd.sat", [0], [], [], 1> {
+  let arguments = (ins LLVM_Type, LLVM_Type);
+}
+def LLVM_UAddSat
+    : LLVM_IntrOp<"uadd.sat", [0], [], [], 1> {
+  let arguments = (ins LLVM_Type, LLVM_Type);
+}
+def LLVM_SSubSat
+    : LLVM_IntrOp<"ssub.sat", [0], [], [], 1> {
+  let arguments = (ins LLVM_Type, LLVM_Type);
+}
+def LLVM_USubSat
+    : LLVM_IntrOp<"usub.sat", [0], [], [], 1> {
+  let arguments = (ins LLVM_Type, LLVM_Type);
+}

 def LLVM_AssumeOp : LLVM_ZeroResultIntrOp<"assume", []> {
   let arguments = (ins LLVM_Type:$cond);
 }


 //
 // Coroutine intrinsics.
 //

 def LLVM_CoroIdOp : LLVM_IntrOp<"coro.id", [], [], [], 1> {
   let arguments = (ins I32:$align,
                        LLVM_i8Ptr:$promise,
Index: mlir/test/Target/LLVMIR/Import/intrinsic.ll
===================================================================
--- mlir/test/Target/LLVMIR/Import/intrinsic.ll
+++ mlir/test/Target/LLVMIR/Import/intrinsic.ll
@@ -372,6 +372,42 @@
   ret void
 }

+; CHECK-LABEL:  llvm.func @sadd_sat_test
+define void @sadd_sat_test(i32 %0, i32 %1, <8 x i32> %2, <8 x i32> %3) {
+  ; CHECK: "llvm.intr.sadd.sat"(%{{.*}}, %{{.*}}) : (i32, i32) -> i32
+  %5 = call i32 @llvm.sadd.sat.i32(i32 %0, i32 %1)
+  ; CHECK: "llvm.intr.sadd.sat"(%{{.*}}, %{{.*}}) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  %6 = call <8 x i32> @llvm.sadd.sat.v8i32(<8 x i32> %2, <8 x i32> %3)
+  ret void
+}
+
+; CHECK-LABEL:  llvm.func @uadd_sat_test
+define void @uadd_sat_test(i32 %0, i32 %1, <8 x i32> %2, <8 x i32> %3) {
+  ; CHECK: "llvm.intr.uadd.sat"(%{{.*}}, %{{.*}}) : (i32, i32) -> i32
+  %5 = call i32 @llvm.uadd.sat.i32(i32 %0, i32 %1)
+  ; CHECK: "llvm.intr.uadd.sat"(%{{.*}}, %{{.*}}) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  %6 = call <8 x i32> @llvm.uadd.sat.v8i32(<8 x i32> %2, <8 x i32> %3)
+  ret void
+}
+
+; CHECK-LABEL:  llvm.func @ssub_sat_test
+define void @ssub_sat_test(i32 %0, i32 %1, <8 x i32> %2, <8 x i32> %3) {
+  ; CHECK: "llvm.intr.ssub.sat"(%{{.*}}, %{{.*}}) : (i32, i32) -> i32
+  %5 = call i32 @llvm.ssub.sat.i32(i32 %0, i32 %1)
+  ; CHECK: "llvm.intr.ssub.sat"(%{{.*}}, %{{.*}}) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  %6 = call <8 x i32> @llvm.ssub.sat.v8i32(<8 x i32> %2, <8 x i32> %3)
+  ret void
+}
+
+; CHECK-LABEL:  llvm.func @usub_sat_test
+define void @usub_sat_test(i32 %0, i32 %1, <8 x i32> %2, <8 x i32> %3) {
+  ; CHECK: "llvm.intr.usub.sat"(%{{.*}}, %{{.*}}) : (i32, i32) -> i32
+  %5 = call i32 @llvm.usub.sat.i32(i32 %0, i32 %1)
+  ; CHECK: "llvm.intr.usub.sat"(%{{.*}}, %{{.*}}) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  %6 = call <8 x i32> @llvm.usub.sat.v8i32(<8 x i32> %2, <8 x i32> %3)
+  ret void
+}
+
 ; CHECK-LABEL:  llvm.func @uadd_with_overflow_test
 define void @uadd_with_overflow_test(i32 %0, i32 %1, <8 x i32> %2, <8 x i32> %3) {
   ; CHECK: "llvm.intr.uadd.with.overflow"(%{{.*}}, %{{.*}}) : (i32, i32) -> !llvm.struct<(i32, i1)>
@@ -732,6 +768,14 @@
 declare { <8 x i32>, <8 x i1> } @llvm.smul.with.overflow.v8i32(<8 x i32>, <8 x i32>)
 declare { i32, i1 } @llvm.umul.with.overflow.i32(i32, i32)
 declare { <8 x i32>, <8 x i1> } @llvm.umul.with.overflow.v8i32(<8 x i32>, <8 x i32>)
+declare i32 @llvm.sadd.sat.i32(i32, i32)
+declare <8 x i32> @llvm.sadd.sat.v8i32(<8 x i32>, <8 x i32>)
+declare i32 @llvm.uadd.sat.i32(i32, i32)
+declare <8 x i32> @llvm.uadd.sat.v8i32(<8 x i32>, <8 x i32>)
+declare i32 @llvm.ssub.sat.i32(i32, i32)
+declare <8 x i32> @llvm.ssub.sat.v8i32(<8 x i32>, <8 x i32>)
+declare i32 @llvm.usub.sat.i32(i32, i32)
+declare <8 x i32> @llvm.usub.sat.v8i32(<8 x i32>, <8 x i32>) #0
 declare token @llvm.coro.id(i32, i8* readnone, i8* nocapture readonly, i8*)
 declare i8* @llvm.coro.begin(token, i8* writeonly)
 declare i64 @llvm.coro.size.i64()
Index: mlir/test/Target/LLVMIR/llvmir-intrinsics.mlir
===================================================================
--- mlir/test/Target/LLVMIR/llvmir-intrinsics.mlir
+++ mlir/test/Target/LLVMIR/llvmir-intrinsics.mlir
@@ -428,6 +428,42 @@
   llvm.return
 }

+// CHECK-LABEL: @sadd_sat_test
+llvm.func @sadd_sat_test(%arg0: i32, %arg1: i32, %arg2: vector<8xi32>, %arg3: vector<8xi32>) {
+  // CHECK: call i32 @llvm.sadd.sat.i32
+  "llvm.intr.sadd.sat"(%arg0, %arg1) : (i32, i32) -> i32
+  // CHECK: call <8 x i32> @llvm.sadd.sat.v8i32
+  "llvm.intr.sadd.sat"(%arg2, %arg3) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  llvm.return
+}
+
+// CHECK-LABEL: @uadd_sat_test
+llvm.func @uadd_sat_test(%arg0: i32, %arg1: i32, %arg2: vector<8xi32>, %arg3: vector<8xi32>) {
+  // CHECK: call i32 @llvm.uadd.sat.i32
+  "llvm.intr.uadd.sat"(%arg0, %arg1) : (i32, i32) -> i32
+  // CHECK: call <8 x i32> @llvm.uadd.sat.v8i32
+  "llvm.intr.uadd.sat"(%arg2, %arg3) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  llvm.return
+}
+
+// CHECK-LABEL: @ssub_sat_test
+llvm.func @ssub_sat_test(%arg0: i32, %arg1: i32, %arg2: vector<8xi32>, %arg3: vector<8xi32>) {
+  // CHECK: call i32 @llvm.ssub.sat.i32
+  "llvm.intr.ssub.sat"(%arg0, %arg1) : (i32, i32) -> i32
+  // CHECK: call <8 x i32> @llvm.ssub.sat.v8i32
+  "llvm.intr.ssub.sat"(%arg2, %arg3) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  llvm.return
+}
+
+// CHECK-LABEL: @usub_sat_test
+llvm.func @usub_sat_test(%arg0: i32, %arg1: i32, %arg2: vector<8xi32>, %arg3: vector<8xi32>) {
+  // CHECK: call i32 @llvm.usub.sat.i32
+  "llvm.intr.usub.sat"(%arg0, %arg1) : (i32, i32) -> i32
+  // CHECK: call <8 x i32> @llvm.usub.sat.v8i32
+  "llvm.intr.usub.sat"(%arg2, %arg3) : (vector<8xi32>, vector<8xi32>) -> vector<8xi32>
+  llvm.return
+}
+
 // CHECK-LABEL: @coro_id
 llvm.func @coro_id(%arg0: i32, %arg1: !llvm.ptr<i8>) {
   // CHECK: call token @llvm.coro.id
@@ -770,6 +806,14 @@
 // CHECK-DAG: declare { <8 x i32>, <8 x i1> } @llvm.usub.with.overflow.v8i32(<8 x i32>, <8 x i32>) #0
 // CHECK-DAG: declare { i32, i1 } @llvm.umul.with.overflow.i32(i32, i32)
 // CHECK-DAG: declare { <8 x i32>, <8 x i1> } @llvm.umul.with.overflow.v8i32(<8 x i32>, <8 x i32>) #0
+// CHECK-DAG: declare i32 @llvm.sadd.sat.i32(i32, i32) #0
+// CHECK-DAG: declare <8 x i32> @llvm.sadd.sat.v8i32(<8 x i32>, <8 x i32>) #0
+// CHECK-DAG: declare i32 @llvm.uadd.sat.i32(i32, i32) #0
+// CHECK-DAG: declare <8 x i32> @llvm.uadd.sat.v8i32(<8 x i32>, <8 x i32>) #0
+// CHECK-DAG: declare i32 @llvm.ssub.sat.i32(i32, i32) #0
+// CHECK-DAG: declare <8 x i32> @llvm.ssub.sat.v8i32(<8 x i32>, <8 x i32>) #0
+// CHECK-DAG: declare i32 @llvm.usub.sat.i32(i32, i32) #0
+// CHECK-DAG: declare <8 x i32> @llvm.usub.sat.v8i32(<8 x i32>, <8 x i32>) #0
 // CHECK-DAG: declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr)
 // CHECK-DAG: declare ptr @llvm.coro.begin(token, ptr writeonly)
 // CHECK-DAG: declare i64 @llvm.coro.size.i64()