1; Test that the sprintf 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@null = constant [1 x i8] zeroinitializer
10@null_hello = constant [7 x i8] c"\00hello\00"
11@h = constant [2 x i8] c"h\00"
12@percent_c = constant [3 x i8] c"%c\00"
13@percent_d = constant [3 x i8] c"%d\00"
14@percent_f = constant [3 x i8] c"%f\00"
15@percent_s = constant [3 x i8] c"%s\00"
16
17declare i32 @sprintf(i8*, i8*, ...)
18
19; Check sprintf(dst, fmt) -> llvm.memcpy(str, fmt, strlen(fmt) + 1, 1).
20
21define void @test_simplify1(i8* %dst) {
22; CHECK-LABEL: @test_simplify1(
23  %fmt = getelementptr [13 x i8]* @hello_world, i32 0, i32 0
24  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt)
25; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* getelementptr inbounds ([13 x i8]* @hello_world, i32 0, i32 0), i32 13, i32 1, i1 false)
26  ret void
27; CHECK-NEXT: ret void
28}
29
30define void @test_simplify2(i8* %dst) {
31; CHECK-LABEL: @test_simplify2(
32  %fmt = getelementptr [1 x i8]* @null, i32 0, i32 0
33  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt)
34; CHECK-NEXT: store i8 0, i8* %dst, align 1
35  ret void
36; CHECK-NEXT: ret void
37}
38
39define void @test_simplify3(i8* %dst) {
40; CHECK-LABEL: @test_simplify3(
41  %fmt = getelementptr [7 x i8]* @null_hello, i32 0, i32 0
42  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt)
43; CHECK-NEXT: store i8 0, i8* %dst, align 1
44  ret void
45; CHECK-NEXT: ret void
46}
47
48; Check sprintf(dst, "%c", chr) -> *(i8*)dst = chr; *((i8*)dst + 1) = 0.
49
50define void @test_simplify4(i8* %dst) {
51; CHECK-LABEL: @test_simplify4(
52  %fmt = getelementptr [3 x i8]* @percent_c, i32 0, i32 0
53  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt, i8 104)
54; CHECK-NEXT: store i8 104, i8* %dst, align 1
55; CHECK-NEXT: [[NUL:%[a-z0-9]+]] = getelementptr i8* %dst, i32 1
56; CHECK-NEXT: store i8 0, i8* [[NUL]], align 1
57  ret void
58; CHECK-NEXT: ret void
59}
60
61; Check sprintf(dst, "%s", str) -> llvm.memcpy(dest, str, strlen(str) + 1, 1).
62
63define void @test_simplify5(i8* %dst, i8* %str) {
64; CHECK-LABEL: @test_simplify5(
65  %fmt = getelementptr [3 x i8]* @percent_s, i32 0, i32 0
66  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt, i8* %str)
67; CHECK-NEXT: [[STRLEN:%[a-z0-9]+]] = call i32 @strlen(i8* %str)
68; CHECK-NEXT: [[LENINC:%[a-z0-9]+]] = add i32 [[STRLEN]], 1
69; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %str, i32 [[LENINC]], i32 1, i1 false)
70  ret void
71; CHECK-NEXT: ret void
72}
73
74; Check sprintf(dst, format, ...) -> siprintf(str, format, ...) if no floating.
75
76define void @test_simplify6(i8* %dst) {
77; CHECK-IPRINTF-LABEL: @test_simplify6(
78  %fmt = getelementptr [3 x i8]* @percent_d, i32 0, i32 0
79  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt, i32 187)
80; CHECK-IPRINTF-NEXT: call i32 (i8*, i8*, ...)* @siprintf(i8* %dst, i8* getelementptr inbounds ([3 x i8]* @percent_d, i32 0, i32 0), i32 187)
81  ret void
82; CHECK-IPRINTF-NEXT: ret void
83}
84
85define void @test_no_simplify1(i8* %dst) {
86; CHECK-IPRINTF-LABEL: @test_no_simplify1(
87  %fmt = getelementptr [3 x i8]* @percent_f, i32 0, i32 0
88  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt, double 1.87)
89; CHECK-IPRINTF-NEXT: call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* getelementptr inbounds ([3 x i8]* @percent_f, i32 0, i32 0), double 1.870000e+00)
90  ret void
91; CHECK-IPRINTF-NEXT: ret void
92}
93
94define void @test_no_simplify2(i8* %dst, i8* %fmt, double %d) {
95; CHECK-LABEL: @test_no_simplify2(
96  call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt, double %d)
97; CHECK-NEXT: call i32 (i8*, i8*, ...)* @sprintf(i8* %dst, i8* %fmt, double %d)
98  ret void
99; CHECK-NEXT: ret void
100}
101