; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s


declare i8* @memrchr(i8*, i32, i32)

define i8* @test1(i8* %str, i32 %c, i32 %n) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
; CHECK-NEXT:    ret i8* [[RET]]
;

  %ret = call i8* @memrchr(i8* %str, i32 %c, i32 %n)
  ret i8* %ret
}

define i8* @test2(i8* %str, i32 %c, i32 %n) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    [[RET:%.*]] = call i8* @memrchr(i8* nonnull [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
; CHECK-NEXT:    ret i8* [[RET]]
;

  %ret = call i8* @memrchr(i8* nonnull %str, i32 %c, i32 %n)
  ret i8* %ret
}

define i8* @test3(i8* %str, i32 %c) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 5)
; CHECK-NEXT:    ret i8* [[RET]]
;

  %ret = call i8* @memrchr(i8* %str, i32 %c, i32 5)
  ret i8* %ret
}

define i8* @test4(i8* %str, i32 %c) null_pointer_is_valid {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 5)
; CHECK-NEXT:    ret i8* [[RET]]
;

  %ret = call i8* @memrchr(i8* %str, i32 %c, i32 5)
  ret i8* %ret
}

define i8* @test5(i8* %str, i32 %c) {
; CHECK-LABEL: @test5(
; CHECK-NEXT:    [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 0)
; CHECK-NEXT:    ret i8* [[RET]]
;

  %ret = call i8* @memrchr(i8* %str, i32 %c, i32 0)
  ret i8* %ret
}