1 ; Test that the strncmp library call simplifier works correctly. 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 4 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" 5 6 @hello = constant [6 x i8] c"hello\00" 7 @hell = constant [5 x i8] c"hell\00" 8 9 declare i16 @strncmp(i8*, i8*, i32) 10 11 define i16 @test_nosimplify() { 12 ; CHECK-LABEL: @test_nosimplify( 13 ; CHECK: call i16 @strncmp 14 ; CHECK: ret i16 %temp1 15 16 %str1 = getelementptr inbounds [5 x i8]* @hell, i32 0, i32 0 17 %str2 = getelementptr inbounds [6 x i8]* @hello, i32 0, i32 0 18 %temp1 = call i16 @strncmp(i8* %str1, i8* %str2, i32 10) 19 ret i16 %temp1 20 } 21
