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 @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" 17 18 declare i32 @printf(i8*, ...) 19 20 ; Check printf("") -> noop. 21 22 define void @test_simplify1() { 23 ; CHECK-LABEL: @test_simplify1( 24 %fmt = getelementptr [1 x i8]* @empty, i32 0, i32 0 25 call i32 (i8*, ...)* @printf(i8* %fmt) 26 ret void 27 ; CHECK-NEXT: ret void 28 } 29 30 ; Check printf("x") -> putchar('x'), even for '%'. 31 32 define void @test_simplify2() { 33 ; CHECK-LABEL: @test_simplify2( 34 %fmt = getelementptr [2 x i8]* @h, i32 0, i32 0 35 call i32 (i8*, ...)* @printf(i8* %fmt) 36 ; CHECK-NEXT: call i32 @putchar(i32 104) 37 ret void 38 ; CHECK-NEXT: ret void 39 } 40 41 define void @test_simplify3() { 42 ; CHECK-LABEL: @test_simplify3( 43 %fmt = getelementptr [2 x i8]* @percent, i32 0, i32 0 44 call i32 (i8*, ...)* @printf(i8* %fmt) 45 ; CHECK-NEXT: call i32 @putchar(i32 37) 46 ret void 47 ; CHECK-NEXT: ret void 48 } 49 50 ; Check printf("foo\n") -> puts("foo"). 51 52 define void @test_simplify4() { 53 ; CHECK-LABEL: @test_simplify4( 54 %fmt = getelementptr [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]* [[STR]], i32 0, i32 0)) 57 ret void 58 ; CHECK-NEXT: ret void 59 } 60 61 ; Check printf("%c", chr) -> putchar(chr). 62 63 define void @test_simplify5() { 64 ; CHECK-LABEL: @test_simplify5( 65 %fmt = getelementptr [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) 68 ret void 69 ; CHECK-NEXT: ret void 70 } 71 72 ; Check printf("%s\n", str) -> puts(str). 73 74 define void @test_simplify6() { 75 ; CHECK-LABEL: @test_simplify6( 76 %fmt = getelementptr [4 x i8]* @percent_s, i32 0, i32 0 77 %str = getelementptr [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]* @hello_world, i32 0, i32 0)) 80 ret void 81 ; CHECK-NEXT: ret void 82 } 83 84 ; Check printf(format, ...) -> iprintf(format, ...) if no floating point. 85 86 define void @test_simplify7() { 87 ; CHECK-IPRINTF-LABEL: @test_simplify7( 88 %fmt = getelementptr [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]* @percent_d, i32 0, i32 0), i32 187) 91 ret void 92 ; CHECK-IPRINTF-NEXT: ret void 93 } 94 95 define void @test_no_simplify1() { 96 ; CHECK-IPRINTF-LABEL: @test_no_simplify1( 97 %fmt = getelementptr [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]* @percent_f, i32 0, i32 0), double 1.870000e+00) 100 ret void 101 ; CHECK-IPRINTF-NEXT: ret void 102 } 103 104 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) 108 ret void 109 ; CHECK-NEXT: ret void 110 } 111 112 define i32 @test_no_simplify3() { 113 ; CHECK-LABEL: @test_no_simplify3( 114 %fmt = getelementptr [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]* @h, i32 0, i32 0)) 117 ret i32 %ret 118 ; CHECK-NEXT: ret i32 %ret 119 } 120
