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 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@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: [[$STR:@[a-z0-9]+]] = private unnamed_addr constant [12 x i8] c"hello world\00" 18 19declare i32 @printf(i8*, ...) 20 21; Check printf("") -> noop. 22 23define void @test_simplify1() { 24; CHECK-LABEL: @test_simplify1( 25 %fmt = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0 26 call i32 (i8*, ...) @printf(i8* %fmt) 27 ret void 28; CHECK-NEXT: ret void 29} 30 31; Check printf("x") -> putchar('x'), even for '%'. 32 33define void @test_simplify2() { 34; CHECK-LABEL: @test_simplify2( 35 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 36 call i32 (i8*, ...) @printf(i8* %fmt) 37; CHECK-NEXT: call i32 @putchar(i32 104) 38 ret void 39; CHECK-NEXT: ret void 40} 41 42; Special case: printf("%%") -> putchar('%'). 43 44define void @test_simplify2b() { 45; CHECK-LABEL: @test_simplify2b( 46 %fmt = getelementptr [3 x i8], [3 x i8]* @h2, i32 0, i32 0 47 call i32 (i8*, ...) @printf(i8* %fmt) 48; CHECK-NEXT: call i32 @putchar(i32 37) 49 ret void 50; CHECK-NEXT: ret void 51} 52 53define void @test_simplify3() { 54; CHECK-LABEL: @test_simplify3( 55 %fmt = getelementptr [2 x i8], [2 x i8]* @percent, i32 0, i32 0 56 call i32 (i8*, ...) @printf(i8* %fmt) 57; CHECK-NEXT: call i32 @putchar(i32 37) 58 ret void 59; CHECK-NEXT: ret void 60} 61 62; Check printf("foo\n") -> puts("foo"). 63 64define void @test_simplify4() { 65; CHECK-LABEL: @test_simplify4( 66 %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 67 call i32 (i8*, ...) @printf(i8* %fmt) 68; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[$STR]], i32 0, i32 0)) 69 ret void 70; CHECK-NEXT: ret void 71} 72 73; Check printf("%c", chr) -> putchar(chr). 74 75define 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 86define 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 98define 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 107define 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 116define 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 124define 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