diff --git a/llvm/test/Transforms/InstCombine/to-ptrmask.ll b/llvm/test/Transforms/InstCombine/to-ptrmask.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/to-ptrmask.ll
@@ -0,0 +1,250 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+declare ptr @llvm.ptrmask(ptr, i64)
+declare void @use.i64(i64)
+
+define ptr @intoptr_mask(ptr noundef %p, i64 %m) {
+; CHECK-LABEL: define ptr @intoptr_mask
+; CHECK-SAME: (ptr noundef [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_MASKED:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PM:%.*]] = inttoptr i64 [[PI_MASKED]] to ptr
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_masked = and i64 %pi, %m
+  %pm = inttoptr i64 %pi_masked to ptr
+  ret ptr %pm
+}
+
+define <2 x ptr> @intoptr_mask_fail_vec(<2 x ptr> noundef %p, <2 x i64> %m) {
+; CHECK-LABEL: define <2 x ptr> @intoptr_mask_fail_vec
+; CHECK-SAME: (<2 x ptr> noundef [[P:%.*]], <2 x i64> [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint <2 x ptr> [[P]] to <2 x i64>
+; CHECK-NEXT:    [[PI_MASKED:%.*]] = and <2 x i64> [[PI]], [[M]]
+; CHECK-NEXT:    [[PM:%.*]] = inttoptr <2 x i64> [[PI_MASKED]] to <2 x ptr>
+; CHECK-NEXT:    ret <2 x ptr> [[PM]]
+;
+  %pi = ptrtoint <2 x ptr> %p to <2 x i64>
+  %pi_masked = and <2 x i64> %pi, %m
+  %pm = inttoptr <2 x i64> %pi_masked to <2 x ptr>
+  ret <2 x ptr> %pm
+}
+
+define ptr @intoptr_mask_fail_i32(ptr noundef %p, i32 %m) {
+; CHECK-LABEL: define ptr @intoptr_mask_fail_i32
+; CHECK-SAME: (ptr noundef [[P:%.*]], i32 [[M:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI:%.*]] = trunc i64 [[TMP1]] to i32
+; CHECK-NEXT:    [[PI_MASKED:%.*]] = and i32 [[PI]], [[M]]
+; CHECK-NEXT:    [[TMP2:%.*]] = zext i32 [[PI_MASKED]] to i64
+; CHECK-NEXT:    [[PM:%.*]] = inttoptr i64 [[TMP2]] to ptr
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i32
+  %pi_masked = and i32 %pi, %m
+  %pm = inttoptr i32 %pi_masked to ptr
+  ret ptr %pm
+}
+
+define ptr @intoptr_mask_fail_multiuse(ptr noundef %p, i64 %m) {
+; CHECK-LABEL: define ptr @intoptr_mask_fail_multiuse
+; CHECK-SAME: (ptr noundef [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_MASKED:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    call void @use.i64(i64 [[PI_MASKED]])
+; CHECK-NEXT:    [[PM:%.*]] = inttoptr i64 [[PI_MASKED]] to ptr
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_masked = and i64 %pi, %m
+  call void @use.i64(i64 %pi_masked)
+  %pm = inttoptr i64 %pi_masked to ptr
+  ret ptr %pm
+}
+
+define ptr @inttoptr_mask_fail_missing_noundef(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @inttoptr_mask_fail_missing_noundef
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_MASKED:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PM:%.*]] = inttoptr i64 [[PI_MASKED]] to ptr
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_masked = and i64 %pi, %m
+  %pm = inttoptr i64 %pi_masked to ptr
+  ret ptr %pm
+}
+
+define i64 @pattern_missing_inttoptr_fail(ptr noundef %p, i64 %m) {
+; CHECK-LABEL: define i64 @pattern_missing_inttoptr_fail
+; CHECK-SAME: (ptr noundef [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_MASKED:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    ret i64 [[PI_MASKED]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_masked = and i64 %pi, %m
+  ret i64 %pi_masked
+}
+
+
+define ptr @GEP_inttoptr_complex_to_simple(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_complex_to_simple
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = xor i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PI_OFF:%.*]] = sub i64 [[PI_M]], [[PI]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr inbounds i8, ptr [[P]], i64 [[PI_OFF]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = xor i64 %pi, %m
+  %pi_off = sub i64 %pi_m, %pi
+  %pm = getelementptr inbounds i8, ptr %p, i64 %pi_off
+  ret ptr %pm
+}
+
+define ptr @GEP_inttoptr_complex_pattern(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_complex_pattern
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PI_OFF:%.*]] = sub i64 [[PI_M]], [[PI]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, ptr [[P]], i64 [[PI_OFF]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = and i64 %pi, %m
+  %pi_off = sub i64 %pi_m, %pi
+  %pm = getelementptr i8, ptr %p, i64 %pi_off
+  ret ptr %pm
+}
+
+define <2 x ptr> @GEP_inttoptr_complex_pattern_fail_vec(<2 x ptr> %p, <2 x i64> %m) {
+; CHECK-LABEL: define <2 x ptr> @GEP_inttoptr_complex_pattern_fail_vec
+; CHECK-SAME: (<2 x ptr> [[P:%.*]], <2 x i64> [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint <2 x ptr> [[P]] to <2 x i64>
+; CHECK-NEXT:    [[PI_M:%.*]] = and <2 x i64> [[PI]], [[M]]
+; CHECK-NEXT:    [[PI_OFF:%.*]] = sub <2 x i64> [[PI_M]], [[PI]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, <2 x ptr> [[P]], <2 x i64> [[PI_OFF]]
+; CHECK-NEXT:    ret <2 x ptr> [[PM]]
+;
+  %pi = ptrtoint <2 x ptr> %p to <2 x i64>
+  %pi_m = and <2 x i64> %pi, %m
+  %pi_off = sub <2 x i64> %pi_m, %pi
+  %pm = getelementptr i8, <2 x ptr> %p, <2 x i64> %pi_off
+  ret <2 x ptr> %pm
+}
+
+define ptr @GEP_inttoptr_complex_pattern_with_multiuse(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_complex_pattern_with_multiuse
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PI_OFF:%.*]] = sub i64 [[PI_M]], [[PI]]
+; CHECK-NEXT:    call void @use.i64(i64 [[PI_OFF]])
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, ptr [[P]], i64 [[PI_OFF]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = and i64 %pi, %m
+  %pi_off = sub i64 %pi_m, %pi
+  call void @use.i64(i64 %pi_off)
+  %pm = getelementptr i8, ptr %p, i64 %pi_off
+  ret ptr %pm
+}
+
+define ptr @GEP_inttoptr_complex_pattern_fail_i32(ptr %p, i32 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_complex_pattern_fail_i32
+; CHECK-SAME: (ptr [[P:%.*]], i32 [[M:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI:%.*]] = trunc i64 [[TMP1]] to i32
+; CHECK-NEXT:    [[PI_M:%.*]] = and i32 [[PI]], [[M]]
+; CHECK-NEXT:    [[PI_OFF:%.*]] = sub i32 [[PI_M]], [[PI]]
+; CHECK-NEXT:    [[TMP2:%.*]] = sext i32 [[PI_OFF]] to i64
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, ptr [[P]], i64 [[TMP2]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i32
+  %pi_m = and i32 %pi, %m
+  %pi_off = sub i32 %pi_m, %pi
+  %pm = getelementptr i8, ptr %p, i32 %pi_off
+  ret ptr %pm
+}
+
+define ptr @GEP_inttoptr_simple_pattern(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_simple_pattern
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, ptr null, i64 [[PI_M]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = and i64 %pi, %m
+  %pm = getelementptr i8, ptr null, i64 %pi_m
+  ret ptr %pm
+}
+
+define <2 x ptr> @GEP_inttoptr_simple_pattern_fail_vec(<2 x ptr> %p, <2 x i64> %m) {
+; CHECK-LABEL: define <2 x ptr> @GEP_inttoptr_simple_pattern_fail_vec
+; CHECK-SAME: (<2 x ptr> [[P:%.*]], <2 x i64> [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint <2 x ptr> [[P]] to <2 x i64>
+; CHECK-NEXT:    [[PI_M:%.*]] = and <2 x i64> [[PI]], [[M]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, <2 x ptr> zeroinitializer, <2 x i64> [[PI_M]]
+; CHECK-NEXT:    ret <2 x ptr> [[PM]]
+;
+  %pi = ptrtoint <2 x ptr> %p to <2 x i64>
+  %pi_m = and <2 x i64> %pi, %m
+  %pm = getelementptr i8, <2 x ptr> zeroinitializer, <2 x i64> %pi_m
+  ret <2 x ptr> %pm
+}
+
+define ptr @GEP_inttoptr_simple_pattern_fail_multiuse(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_simple_pattern_fail_multiuse
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    call void @use.i64(i64 [[PI_M]])
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i8, ptr null, i64 [[PI_M]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = and i64 %pi, %m
+  call void @use.i64(i64 %pi_m)
+  %pm = getelementptr i8, ptr null, i64 %pi_m
+  ret ptr %pm
+}
+
+define ptr @GEP_inttoptr_complex_pattern_fail_not_i8(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_complex_pattern_fail_not_i8
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PI_OFF:%.*]] = sub i64 [[PI_M]], [[PI]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr i16, ptr [[P]], i64 [[PI_OFF]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = and i64 %pi, %m
+  %pi_off = sub i64 %pi_m, %pi
+  %pm = getelementptr i16, ptr %p, i64 %pi_off
+  ret ptr %pm
+}
+
+define ptr @GEP_inttoptr_simple_pattern_fail_not_i8(ptr %p, i64 %m) {
+; CHECK-LABEL: define ptr @GEP_inttoptr_simple_pattern_fail_not_i8
+; CHECK-SAME: (ptr [[P:%.*]], i64 [[M:%.*]]) {
+; CHECK-NEXT:    [[PI:%.*]] = ptrtoint ptr [[P]] to i64
+; CHECK-NEXT:    [[PI_M:%.*]] = and i64 [[PI]], [[M]]
+; CHECK-NEXT:    [[PM:%.*]] = getelementptr <2 x i8>, ptr null, i64 [[PI_M]]
+; CHECK-NEXT:    ret ptr [[PM]]
+;
+  %pi = ptrtoint ptr %p to i64
+  %pi_m = and i64 %pi, %m
+  %pm = getelementptr <2 x i8>, ptr null, i64 %pi_m
+  ret ptr %pm
+}