1; Test that the puts library call simplifier works correctly.
2;
3; RUN: opt < %s -instcombine -S | FileCheck %s
4
5target 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"
6
7@empty = constant [1 x i8] zeroinitializer
8
9declare i32 @puts(i8*)
10
11; Check puts("") -> putchar('\n').
12
13define void @test_simplify1() {
14; CHECK-LABEL: @test_simplify1(
15  %str = getelementptr [1 x i8]* @empty, i32 0, i32 0
16  call i32 @puts(i8* %str)
17; CHECK-NEXT: call i32 @putchar(i32 10)
18  ret void
19; CHECK-NEXT: ret void
20}
21
22; Don't simplify if the return value is used.
23
24define i32 @test_no_simplify1() {
25; CHECK-LABEL: @test_no_simplify1(
26  %str = getelementptr [1 x i8]* @empty, i32 0, i32 0
27  %ret = call i32 @puts(i8* %str)
28; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([1 x i8]* @empty, i32 0, i32 0))
29  ret i32 %ret
30; CHECK-NEXT: ret i32 %ret
31}
32