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 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" 7 8 @hello_world = constant [13 x i8] c"hello world\0A\00" 9 @h = constant [2 x i8] c"h\00" 10 @h2 = constant [3 x i8] c"%%\00" 11 @percent = constant [2 x i8] c"%\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 [4 x i8] c"%s\0A\00" 16 @empty = constant [1 x i8] c"\00" 17 ; CHECK: [[STR:@[a-z0-9]+]] = private unnamed_addr constant [12 x i8] c"hello world\00" 18 19 declare i32 @printf(i8*, ...) 20 21 ; Check printf("") -> noop. 22 23 define void @test_simplify1() { 24 ; CHECK-LABEL: @test_simplify1( 25 %fmt = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0 26 call i32 (i8*, ...) @printf(i8* %fmt) 27 ret void 28 ; CHECK-NEXT: ret void 29 } 30 31 ; Check printf("x") -> putchar('x'), even for '%'. 32 33 define void @test_simplify2() { 34 ; CHECK-LABEL: @test_simplify2( 35 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 36 call i32 (i8*, ...) @printf(i8* %fmt) 37 ; CHECK-NEXT: call i32 @putchar(i32 104) 38 ret void 39 ; CHECK-NEXT: ret void 40 } 41 42 ; Special case: printf("%%") -> putchar('%'). 43 44 define void @test_simplify2b() { 45 ; CHECK-LABEL: @test_simplify2b( 46 %fmt = getelementptr [3 x i8], [3 x i8]* @h2, i32 0, i32 0 47 call i32 (i8*, ...) @printf(i8* %fmt) 48 ; CHECK-NEXT: call i32 @putchar(i32 37) 49 ret void 50 ; CHECK-NEXT: ret void 51 } 52 53 define void @test_simplify3() { 54 ; CHECK-LABEL: @test_simplify3( 55 %fmt = getelementptr [2 x i8], [2 x i8]* @percent, i32 0, i32 0 56 call i32 (i8*, ...) @printf(i8* %fmt) 57 ; CHECK-NEXT: call i32 @putchar(i32 37) 58 ret void 59 ; CHECK-NEXT: ret void 60 } 61 62 ; Check printf("foo\n") -> puts("foo"). 63 64 define void @test_simplify4() { 65 ; CHECK-LABEL: @test_simplify4( 66 %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 67 call i32 (i8*, ...) @printf(i8* %fmt) 68 ; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[STR]], i32 0, i32 0)) 69 ret void 70 ; CHECK-NEXT: ret void 71 } 72 73 ; Check printf("%c", chr) -> putchar(chr). 74 75 define void @test_simplify5() { 76 ; CHECK-LABEL: @test_simplify5( 77 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_c, i32 0, i32 0 78 call i32 (i8*, ...) @printf(i8* %fmt, i8 104) 79 ; CHECK-NEXT: call i32 @putchar(i32 104) 80 ret void 81 ; CHECK-NEXT: ret void 82 } 83 84 ; Check printf("%s\n", str) -> puts(str). 85 86 define void @test_simplify6() { 87 ; CHECK-LABEL: @test_simplify6( 88 %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0 89 %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 90 call i32 (i8*, ...) @printf(i8* %fmt, i8* %str) 91 ; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0)) 92 ret void 93 ; CHECK-NEXT: ret void 94 } 95 96 ; Check printf(format, ...) -> iprintf(format, ...) if no floating point. 97 98 define void @test_simplify7() { 99 ; CHECK-IPRINTF-LABEL: @test_simplify7( 100 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_d, i32 0, i32 0 101 call i32 (i8*, ...) @printf(i8* %fmt, i32 187) 102 ; CHECK-IPRINTF-NEXT: call i32 (i8*, ...) @iprintf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @percent_d, i32 0, i32 0), i32 187) 103 ret void 104 ; CHECK-IPRINTF-NEXT: ret void 105 } 106 107 define void @test_no_simplify1() { 108 ; CHECK-IPRINTF-LABEL: @test_no_simplify1( 109 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_f, i32 0, i32 0 110 call i32 (i8*, ...) @printf(i8* %fmt, double 1.87) 111 ; 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) 112 ret void 113 ; CHECK-IPRINTF-NEXT: ret void 114 } 115 116 define void @test_no_simplify2(i8* %fmt, double %d) { 117 ; CHECK-LABEL: @test_no_simplify2( 118 call i32 (i8*, ...) @printf(i8* %fmt, double %d) 119 ; CHECK-NEXT: call i32 (i8*, ...) @printf(i8* %fmt, double %d) 120 ret void 121 ; CHECK-NEXT: ret void 122 } 123 124 define i32 @test_no_simplify3() { 125 ; CHECK-LABEL: @test_no_simplify3( 126 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 127 %ret = call i32 (i8*, ...) @printf(i8* %fmt) 128 ; CHECK-NEXT: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @h, i32 0, i32 0)) 129 ret i32 %ret 130 ; CHECK-NEXT: ret i32 %ret 131 } 132
