1; Test that the printf 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@hello_world = constant [13 x i8] c"hello world\0A\00"
8@h = constant [2 x i8] c"h\00"
9@percent_s = constant [4 x i8] c"%s\0A\00"
10@format_str = constant [3 x i8] c"%s\00"
11@charstr = constant [2 x i8] c"a\00"
12
13declare void @printf(i8*, ...)
14
15; Check simplification of printf with void return type.
16
17define void @test_simplify1() {
18; CHECK-LABEL: @test_simplify1(
19  %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0
20  call void (i8*, ...) @printf(i8* %fmt)
21; CHECK-NEXT: call i32 @putchar(i32 104)
22  ret void
23; CHECK-NEXT: ret void
24}
25
26define void @test_simplify2() {
27; CHECK-LABEL: @test_simplify2(
28  %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0
29  call void (i8*, ...) @printf(i8* %fmt)
30; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @str, i32 0, i32 0))
31  ret void
32; CHECK-NEXT: ret void
33}
34
35define void @test_simplify6() {
36; CHECK-LABEL: @test_simplify6(
37  %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0
38  %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0
39  call void (i8*, ...) @printf(i8* %fmt, i8* %str)
40; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0))
41  ret void
42; CHECK-NEXT: ret void
43}
44
45define void @test_simplify7() {
46; CHECK-LABEL: @test_simplify7(
47  %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0
48  %str = getelementptr [2 x i8], [2 x i8]* @charstr, i32 0, i32 0
49  call void (i8*, ...) @printf(i8* %fmt, i8* %str)
50; CHECK-NEXT: call i32 @putchar(i32 97)
51  ret void
52; CHECK-NEXT: ret void
53}
54