1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
2; Test that the printf library call simplifier works correctly.
3;
4; RUN: opt < %s -instcombine -S | FileCheck %s
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_s = constant [4 x i8] c"%s\0A\00"
11@format_str = constant [3 x i8] c"%s\00"
12@charstr = constant [2 x i8] c"a\00"
13
14declare void @printf(i8*, ...)
15
16; Check simplification of printf with void return type.
17
18;.
19; CHECK: @[[HELLO_WORLD:[a-zA-Z0-9_$"\\.-]+]] = constant [13 x i8] c"hello world\0A\00"
20; CHECK: @[[H:[a-zA-Z0-9_$"\\.-]+]] = constant [2 x i8] c"h\00"
21; CHECK: @[[PERCENT_S:[a-zA-Z0-9_$"\\.-]+]] = constant [4 x i8] c"%s\0A\00"
22; CHECK: @[[FORMAT_STR:[a-zA-Z0-9_$"\\.-]+]] = constant [3 x i8] c"%s\00"
23; CHECK: @[[CHARSTR:[a-zA-Z0-9_$"\\.-]+]] = constant [2 x i8] c"a\00"
24; CHECK: @[[STR:[a-zA-Z0-9_$"\\.-]+]] = private unnamed_addr constant [12 x i8] c"hello world\00", align 1
25;.
26define void @test_simplify1() {
27; CHECK-LABEL: @test_simplify1(
28; CHECK-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 104)
29; CHECK-NEXT:    ret void
30;
31  %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0
32  call void (i8*, ...) @printf(i8* %fmt)
33  ret void
34}
35
36define void @test_simplify2() {
37; CHECK-LABEL: @test_simplify2(
38; CHECK-NEXT:    [[PUTS:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i32 0, i32 0))
39; CHECK-NEXT:    ret void
40;
41  %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0
42  call void (i8*, ...) @printf(i8* %fmt)
43  ret void
44}
45
46define void @test_simplify6() {
47; CHECK-LABEL: @test_simplify6(
48; CHECK-NEXT:    [[PUTS:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0))
49; CHECK-NEXT:    ret void
50;
51  %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0
52  %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0
53  call void (i8*, ...) @printf(i8* %fmt, i8* %str)
54  ret void
55}
56
57define void @test_simplify7() {
58; CHECK-LABEL: @test_simplify7(
59; CHECK-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 97)
60; CHECK-NEXT:    ret void
61;
62  %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0
63  %str = getelementptr [2 x i8], [2 x i8]* @charstr, i32 0, i32 0
64  call void (i8*, ...) @printf(i8* %fmt, i8* %str)
65  ret void
66}
67;.
68; CHECK: attributes #[[ATTR0:[0-9]+]] = { nofree nounwind }
69;.
70