; Test that the strcspn library call simplifier works correctly.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

@null = constant [1 x i8] zeroinitializer

declare double @strcspn(ptr, ptr)

; Check that strcspn functions with the wrong prototype aren't simplified.

define double @test_no_simplify1(ptr %pat) {
; CHECK-LABEL: @test_no_simplify1(

  %ret = call double @strcspn(ptr @null, ptr %pat)
; CHECK-NEXT: call double @strcspn
  ret double %ret
; CHECK-NEXT: ret double %ret
}