1; Test that the printf library call simplifier works correctly.
2;
3; RUN: opt < %s -instcombine -S | FileCheck %s
4; RUN: opt < %s -mtriple xcore-xmos-elf -instcombine -S | FileCheck %s -check-prefix=CHECK-IPRINTF
5
6target 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
8@hello_world = constant [13 x i8] c"hello world\0A\00"
9@h = constant [2 x i8] c"h\00"
10@percent = constant [2 x i8] c"%\00"
11@percent_c = constant [3 x i8] c"%c\00"
12@percent_d = constant [3 x i8] c"%d\00"
13@percent_f = constant [3 x i8] c"%f\00"
14@percent_s = constant [4 x i8] c"%s\0A\00"
15@empty = constant [1 x i8] c"\00"
16; CHECK: [[STR:@[a-z0-9]+]] = private unnamed_addr constant [12 x i8] c"hello world\00"
17
18declare i32 @printf(i8*, ...)
19
20; Check printf("") -> noop.
21
22define void @test_simplify1() {
23; CHECK-LABEL: @test_simplify1(
24  %fmt = getelementptr [1 x i8]* @empty, i32 0, i32 0
25  call i32 (i8*, ...)* @printf(i8* %fmt)
26  ret void
27; CHECK-NEXT: ret void
28}
29
30; Check printf("x") -> putchar('x'), even for '%'.
31
32define void @test_simplify2() {
33; CHECK-LABEL: @test_simplify2(
34  %fmt = getelementptr [2 x i8]* @h, i32 0, i32 0
35  call i32 (i8*, ...)* @printf(i8* %fmt)
36; CHECK-NEXT: call i32 @putchar(i32 104)
37  ret void
38; CHECK-NEXT: ret void
39}
40
41define void @test_simplify3() {
42; CHECK-LABEL: @test_simplify3(
43  %fmt = getelementptr [2 x i8]* @percent, i32 0, i32 0
44  call i32 (i8*, ...)* @printf(i8* %fmt)
45; CHECK-NEXT: call i32 @putchar(i32 37)
46  ret void
47; CHECK-NEXT: ret void
48}
49
50; Check printf("foo\n") -> puts("foo").
51
52define void @test_simplify4() {
53; CHECK-LABEL: @test_simplify4(
54  %fmt = getelementptr [13 x i8]* @hello_world, i32 0, i32 0
55  call i32 (i8*, ...)* @printf(i8* %fmt)
56; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([12 x i8]* [[STR]], i32 0, i32 0))
57  ret void
58; CHECK-NEXT: ret void
59}
60
61; Check printf("%c", chr) -> putchar(chr).
62
63define void @test_simplify5() {
64; CHECK-LABEL: @test_simplify5(
65  %fmt = getelementptr [3 x i8]* @percent_c, i32 0, i32 0
66  call i32 (i8*, ...)* @printf(i8* %fmt, i8 104)
67; CHECK-NEXT: call i32 @putchar(i32 104)
68  ret void
69; CHECK-NEXT: ret void
70}
71
72; Check printf("%s\n", str) -> puts(str).
73
74define void @test_simplify6() {
75; CHECK-LABEL: @test_simplify6(
76  %fmt = getelementptr [4 x i8]* @percent_s, i32 0, i32 0
77  %str = getelementptr [13 x i8]* @hello_world, i32 0, i32 0
78  call i32 (i8*, ...)* @printf(i8* %fmt, i8* %str)
79; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([13 x i8]* @hello_world, i32 0, i32 0))
80  ret void
81; CHECK-NEXT: ret void
82}
83
84; Check printf(format, ...) -> iprintf(format, ...) if no floating point.
85
86define void @test_simplify7() {
87; CHECK-IPRINTF-LABEL: @test_simplify7(
88  %fmt = getelementptr [3 x i8]* @percent_d, i32 0, i32 0
89  call i32 (i8*, ...)* @printf(i8* %fmt, i32 187)
90; CHECK-IPRINTF-NEXT: call i32 (i8*, ...)* @iprintf(i8* getelementptr inbounds ([3 x i8]* @percent_d, i32 0, i32 0), i32 187)
91  ret void
92; CHECK-IPRINTF-NEXT: ret void
93}
94
95define void @test_no_simplify1() {
96; CHECK-IPRINTF-LABEL: @test_no_simplify1(
97  %fmt = getelementptr [3 x i8]* @percent_f, i32 0, i32 0
98  call i32 (i8*, ...)* @printf(i8* %fmt, double 1.87)
99; CHECK-IPRINTF-NEXT: call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([3 x i8]* @percent_f, i32 0, i32 0), double 1.870000e+00)
100  ret void
101; CHECK-IPRINTF-NEXT: ret void
102}
103
104define void @test_no_simplify2(i8* %fmt, double %d) {
105; CHECK-LABEL: @test_no_simplify2(
106  call i32 (i8*, ...)* @printf(i8* %fmt, double %d)
107; CHECK-NEXT: call i32 (i8*, ...)* @printf(i8* %fmt, double %d)
108  ret void
109; CHECK-NEXT: ret void
110}
111
112define i32 @test_no_simplify3() {
113; CHECK-LABEL: @test_no_simplify3(
114  %fmt = getelementptr [2 x i8]* @h, i32 0, i32 0
115  %ret = call i32 (i8*, ...)* @printf(i8* %fmt)
116; CHECK-NEXT: call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([2 x i8]* @h, i32 0, i32 0))
117  ret i32 %ret
118; CHECK-NEXT: ret i32 %ret
119}
120