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@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 18declare i32 @printf(i8*, ...) 19 20; Check printf("") -> noop. 21 22define void @test_simplify1() { 23; CHECK-LABEL: @test_simplify1( 24 %fmt = getelementptr [1 x i8], [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 32define void @test_simplify2() { 33; CHECK-LABEL: @test_simplify2( 34 %fmt = getelementptr [2 x i8], [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 41define void @test_simplify3() { 42; CHECK-LABEL: @test_simplify3( 43 %fmt = getelementptr [2 x i8], [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 52define void @test_simplify4() { 53; CHECK-LABEL: @test_simplify4( 54 %fmt = getelementptr [13 x i8], [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], [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 63define void @test_simplify5() { 64; CHECK-LABEL: @test_simplify5( 65 %fmt = getelementptr [3 x i8], [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 74define void @test_simplify6() { 75; CHECK-LABEL: @test_simplify6( 76 %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0 77 %str = getelementptr [13 x i8], [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], [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 86define void @test_simplify7() { 87; CHECK-IPRINTF-LABEL: @test_simplify7( 88 %fmt = getelementptr [3 x i8], [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], [3 x i8]* @percent_d, i32 0, i32 0), i32 187) 91 ret void 92; CHECK-IPRINTF-NEXT: ret void 93} 94 95define void @test_no_simplify1() { 96; CHECK-IPRINTF-LABEL: @test_no_simplify1( 97 %fmt = getelementptr [3 x i8], [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], [3 x i8]* @percent_f, i32 0, i32 0), double 1.870000e+00) 100 ret void 101; CHECK-IPRINTF-NEXT: ret void 102} 103 104define 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 112define i32 @test_no_simplify3() { 113; CHECK-LABEL: @test_no_simplify3( 114 %fmt = getelementptr [2 x i8], [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], [2 x i8]* @h, i32 0, i32 0)) 117 ret i32 %ret 118; CHECK-NEXT: ret i32 %ret 119} 120