1 ; Test that the printf library call simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 ; RUN: opt < %s -mtriple xcore-xmos-elf -instcombine -S | FileCheck %s -check-prefix=CHECK-IPRINTF
6 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"
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"
18 declare i32 @printf(i8*, ...)
20 ; Check printf("") -> noop.
22 define void @test_simplify1() {
23 ; CHECK-LABEL: @test_simplify1(
24 %fmt = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
25 call i32 (i8*, ...) @printf(i8* %fmt)
27 ; CHECK-NEXT: ret void
30 ; Check printf("x") -> putchar('x'), even for '%'.
32 define void @test_simplify2() {
33 ; CHECK-LABEL: @test_simplify2(
34 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0
35 call i32 (i8*, ...) @printf(i8* %fmt)
36 ; CHECK-NEXT: call i32 @putchar(i32 104)
38 ; CHECK-NEXT: ret void
41 define void @test_simplify3() {
42 ; CHECK-LABEL: @test_simplify3(
43 %fmt = getelementptr [2 x i8], [2 x i8]* @percent, i32 0, i32 0
44 call i32 (i8*, ...) @printf(i8* %fmt)
45 ; CHECK-NEXT: call i32 @putchar(i32 37)
47 ; CHECK-NEXT: ret void
50 ; Check printf("foo\n") -> puts("foo").
52 define void @test_simplify4() {
53 ; CHECK-LABEL: @test_simplify4(
54 %fmt = getelementptr [13 x i8], [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], [12 x i8]* [[STR]], i32 0, i32 0))
58 ; CHECK-NEXT: ret void
61 ; Check printf("%c", chr) -> putchar(chr).
63 define void @test_simplify5() {
64 ; CHECK-LABEL: @test_simplify5(
65 %fmt = getelementptr [3 x i8], [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)
69 ; CHECK-NEXT: ret void
72 ; Check printf("%s\n", str) -> puts(str).
74 define void @test_simplify6() {
75 ; CHECK-LABEL: @test_simplify6(
76 %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0
77 %str = getelementptr [13 x i8], [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], [13 x i8]* @hello_world, i32 0, i32 0))
81 ; CHECK-NEXT: ret void
84 ; Check printf(format, ...) -> iprintf(format, ...) if no floating point.
86 define void @test_simplify7() {
87 ; CHECK-IPRINTF-LABEL: @test_simplify7(
88 %fmt = getelementptr [3 x i8], [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], [3 x i8]* @percent_d, i32 0, i32 0), i32 187)
92 ; CHECK-IPRINTF-NEXT: ret void
95 define void @test_no_simplify1() {
96 ; CHECK-IPRINTF-LABEL: @test_no_simplify1(
97 %fmt = getelementptr [3 x i8], [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], [3 x i8]* @percent_f, i32 0, i32 0), double 1.870000e+00)
101 ; CHECK-IPRINTF-NEXT: ret void
104 define 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)
109 ; CHECK-NEXT: ret void
112 define i32 @test_no_simplify3() {
113 ; CHECK-LABEL: @test_no_simplify3(
114 %fmt = getelementptr [2 x i8], [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], [2 x i8]* @h, i32 0, i32 0))
118 ; CHECK-NEXT: ret i32 %ret