llvm-project/llvm/test/Transforms/InstCombine/strncat-3.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Test that the strncat libcall simplifier works correctly.
;
; RUN: opt < %s -instcombine -S | FileCheck %s

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

@hello = constant [6 x i8] c"hello\00"
@empty = constant [1 x i8] c"\00"
@a = common global [32 x i8] zeroinitializer, align 1

declare i16* @strncat(i8*, i8*, i32)

define void @test_nosimplify1() {
; CHECK-LABEL: @test_nosimplify1(
; CHECK-NEXT:    [[TMP1:%.*]] = call i16* @strncat(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 13)
; CHECK-NEXT:    ret void
;

  %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
  call i16* @strncat(i8* %dst, i8* %src, i32 13)
  ret void
}