1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test that the strncmp library call simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
5 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"
7 @hello = constant [6 x i8] c"hello\00"
8 @hell = constant [5 x i8] c"hell\00"
10 declare i16 @strncmp(i8*, i8*, i32)
12 define i16 @test_nosimplify() {
13 ; CHECK-LABEL: @test_nosimplify(
14 ; CHECK-NEXT: [[TEMP1:%.*]] = call i16 @strncmp(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @hell, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 10)
15 ; CHECK-NEXT: ret i16 [[TEMP1]]
18 %str1 = getelementptr inbounds [5 x i8], [5 x i8]* @hell, i32 0, i32 0
19 %str2 = getelementptr inbounds [6 x i8], [6 x i8]* @hello, i32 0, i32 0
20 %temp1 = call i16 @strncmp(i8* %str1, i8* %str2, i32 10)