1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; Test that the strncpy library call simplifier works correctly.
3;
4; RUN: opt < %s -instcombine -S | FileCheck %s
5
6target 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"
7
8@hello = constant [6 x i8] c"hello\00"
9@a = common global [32 x i8] zeroinitializer, align 1
10
11declare i16* @strncpy(i8*, i8*, i32)
12
13; Check that 'strncpy' functions with the wrong prototype aren't simplified.
14
15define void @test_no_simplify1() {
16; CHECK-LABEL: @test_no_simplify1(
17; CHECK-NEXT:    [[TMP1:%.*]] = call i16* @strncpy(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 6)
18; CHECK-NEXT:    ret void
19;
20  %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
21  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
22
23  call i16* @strncpy(i8* %dst, i8* %src, i32 6)
24  ret void
25}
26