1; Test that the sprintf 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@null = constant [1 x i8] zeroinitializer 10@null_hello = constant [7 x i8] c"\00hello\00" 11@h = constant [2 x i8] c"h\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 [3 x i8] c"%s\00" 16 17declare i32 @sprintf(i8*, i8*, ...) 18 19; Check sprintf(dst, fmt) -> llvm.memcpy(str, fmt, strlen(fmt) + 1, 1). 20 21define void @test_simplify1(i8* %dst) { 22; CHECK-LABEL: @test_simplify1( 23 %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 24 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt) 25; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0), i32 13, i32 1, i1 false) 26 ret void 27; CHECK-NEXT: ret void 28} 29 30define void @test_simplify2(i8* %dst) { 31; CHECK-LABEL: @test_simplify2( 32 %fmt = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 33 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt) 34; CHECK-NEXT: store i8 0, i8* %dst, align 1 35 ret void 36; CHECK-NEXT: ret void 37} 38 39define void @test_simplify3(i8* %dst) { 40; CHECK-LABEL: @test_simplify3( 41 %fmt = getelementptr [7 x i8], [7 x i8]* @null_hello, i32 0, i32 0 42 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt) 43; CHECK-NEXT: store i8 0, i8* %dst, align 1 44 ret void 45; CHECK-NEXT: ret void 46} 47 48; Check sprintf(dst, "%c", chr) -> *(i8*)dst = chr; *((i8*)dst + 1) = 0. 49 50define void @test_simplify4(i8* %dst) { 51; CHECK-LABEL: @test_simplify4( 52 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_c, i32 0, i32 0 53 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt, i8 104) 54; CHECK-NEXT: store i8 104, i8* %dst, align 1 55; CHECK-NEXT: [[NUL:%[a-z0-9]+]] = getelementptr i8, i8* %dst, i32 1 56; CHECK-NEXT: store i8 0, i8* [[NUL]], align 1 57 ret void 58; CHECK-NEXT: ret void 59} 60 61; Check sprintf(dst, "%s", str) -> llvm.memcpy(dest, str, strlen(str) + 1, 1). 62 63define void @test_simplify5(i8* %dst, i8* %str) { 64; CHECK-LABEL: @test_simplify5( 65 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_s, i32 0, i32 0 66 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt, i8* %str) 67; CHECK-NEXT: [[STRLEN:%[a-z0-9]+]] = call i32 @strlen(i8* %str) 68; CHECK-NEXT: [[LENINC:%[a-z0-9]+]] = add i32 [[STRLEN]], 1 69; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %str, i32 [[LENINC]], i32 1, i1 false) 70 ret void 71; CHECK-NEXT: ret void 72} 73 74; Check sprintf(dst, format, ...) -> siprintf(str, format, ...) if no floating. 75 76define void @test_simplify6(i8* %dst) { 77; CHECK-IPRINTF-LABEL: @test_simplify6( 78 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_d, i32 0, i32 0 79 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt, i32 187) 80; CHECK-IPRINTF-NEXT: call i32 (i8*, i8*, ...) @siprintf(i8* %dst, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @percent_d, i32 0, i32 0), i32 187) 81 ret void 82; CHECK-IPRINTF-NEXT: ret void 83} 84 85define void @test_no_simplify1(i8* %dst) { 86; CHECK-IPRINTF-LABEL: @test_no_simplify1( 87 %fmt = getelementptr [3 x i8], [3 x i8]* @percent_f, i32 0, i32 0 88 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt, double 1.87) 89; CHECK-IPRINTF-NEXT: call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @percent_f, i32 0, i32 0), double 1.870000e+00) 90 ret void 91; CHECK-IPRINTF-NEXT: ret void 92} 93 94define void @test_no_simplify2(i8* %dst, i8* %fmt, double %d) { 95; CHECK-LABEL: @test_no_simplify2( 96 call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt, double %d) 97; CHECK-NEXT: call i32 (i8*, i8*, ...) @sprintf(i8* %dst, i8* %fmt, double %d) 98 ret void 99; CHECK-NEXT: ret void 100} 101