1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 @.str = private unnamed_addr constant [4 x i8] c"str\00", align 1
5 @.str.1 = private unnamed_addr constant [3 x i8] c"%%\00", align 1
6 @.str.2 = private unnamed_addr constant [3 x i8] c"%c\00", align 1
7 @.str.3 = private unnamed_addr constant [3 x i8] c"%s\00", align 1
9 declare i32 @snprintf(i8*, i64, i8*, ...) #1
11 define void @test_not_const_fmt(i8* %buf, i8* %fmt) #0 {
12 ; CHECK-LABEL: @test_not_const_fmt(
13 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 32, i8* [[FMT:%.*]])
14 ; CHECK-NEXT: ret void
16 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* %fmt) #2
20 ; size is '0', do not add nonnull attribute
21 define void @test_not_const_fmt_zero_size_return_value(i8* %buf, i8* %fmt) #0 {
22 ; CHECK-LABEL: @test_not_const_fmt_zero_size_return_value(
23 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* [[BUF:%.*]], i64 0, i8* [[FMT:%.*]])
24 ; CHECK-NEXT: ret void
26 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* %fmt) #2
30 define void @test_not_const_size(i8* %buf, i64 %size) #0 {
31 ; CHECK-LABEL: @test_not_const_size(
32 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* [[BUF:%.*]], i64 [[SIZE:%.*]], i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
33 ; CHECK-NEXT: ret void
35 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 %size, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
40 define i32 @test_return_value(i8* %buf) #0 {
41 ; CHECK-LABEL: @test_return_value(
42 ; CHECK-NEXT: ret i32 3
44 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
48 define void @test_percentage(i8* %buf) #0 {
49 ; CHECK-LABEL: @test_percentage(
50 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
51 ; CHECK-NEXT: ret void
53 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0)) #2
57 define i32 @test_null_buf_return_value() #0 {
58 ; CHECK-LABEL: @test_null_buf_return_value(
59 ; CHECK-NEXT: ret i32 3
61 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
65 define i32 @test_percentage_return_value() #0 {
66 ; CHECK-LABEL: @test_percentage_return_value(
67 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
68 ; CHECK-NEXT: ret i32 [[CALL]]
70 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0)) #3
75 define void @test_correct_copy(i8* %buf) #0 {
76 ; CHECK-LABEL: @test_correct_copy(
77 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[BUF:%.*]] to i32*
78 ; CHECK-NEXT: store i32 7500915, i32* [[TMP1]], align 1
79 ; CHECK-NEXT: ret void
81 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
85 define i32 @test_char_zero_size(i8* %buf) #0 {
86 ; CHECK-LABEL: @test_char_zero_size(
87 ; CHECK-NEXT: ret i32 1
89 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65) #2
93 define i32 @test_char_wrong_size(i8* %buf) #0 {
94 ; CHECK-LABEL: @test_char_wrong_size(
95 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65)
96 ; CHECK-NEXT: ret i32 [[CALL]]
98 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65) #2
102 define i32 @test_char_ok_size(i8* %buf) #0 {
103 ; CHECK-LABEL: @test_char_ok_size(
104 ; CHECK-NEXT: store i8 65, i8* [[BUF:%.*]], align 1
105 ; CHECK-NEXT: [[NUL:%.*]] = getelementptr i8, i8* [[BUF]], i64 1
106 ; CHECK-NEXT: store i8 0, i8* [[NUL]], align 1
107 ; CHECK-NEXT: ret i32 1
109 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65) #2
113 define i32 @test_str_zero_size(i8* %buf) #0 {
114 ; CHECK-LABEL: @test_str_zero_size(
115 ; CHECK-NEXT: ret i32 3
117 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
121 define i32 @test_str_wrong_size(i8* %buf) #0 {
122 ; CHECK-LABEL: @test_str_wrong_size(
123 ; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
124 ; CHECK-NEXT: ret i32 [[CALL]]
126 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
130 define i32 @test_str_ok_size(i8* %buf) #0 {
131 ; CHECK-LABEL: @test_str_ok_size(
132 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[BUF:%.*]] to i32*
133 ; CHECK-NEXT: store i32 7500915, i32* [[TMP1]], align 1
134 ; CHECK-NEXT: ret i32 3
136 %call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2