xref: /llvm-project/llvm/test/Transforms/InstCombine/strstr-2.ll (revision 4ab40eca080965c65802710e39adbb78c4ce7bde)
1; Test that the strstr library call simplifier works correctly.
2;
3; RUN: opt < %s -passes=instcombine -S | FileCheck %s
4
5target 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"
6
7@null = private constant [1 x i8] zeroinitializer
8
9declare i8 @strstr(ptr, ptr)
10
11define i8 @test_no_simplify1(ptr %str) {
12; CHECK-LABEL: @test_no_simplify1(
13  %ret = call i8 @strstr(ptr %str, ptr @null)
14; CHECK-NEXT: call i8 @strstr
15  ret i8 %ret
16; CHECK-NEXT: ret i8 %ret
17}
18