1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals 2; Test that the printf library call simplifier works correctly. 3; 4; RUN: opt < %s -passes=instcombine -S | FileCheck %s 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_s = constant [4 x i8] c"%s\0A\00" 11@format_str = constant [3 x i8] c"%s\00" 12@charstr = constant [2 x i8] c"a\00" 13@empty = constant [1 x i8] c"\00" 14 15declare void @printf(i8*, ...) 16 17; Check simplification of printf with void return type. 18 19;. 20; CHECK: @[[HELLO_WORLD:[a-zA-Z0-9_$"\\.-]+]] = constant [13 x i8] c"hello world\0A\00" 21; CHECK: @[[H:[a-zA-Z0-9_$"\\.-]+]] = constant [2 x i8] c"h\00" 22; CHECK: @[[PERCENT_S:[a-zA-Z0-9_$"\\.-]+]] = constant [4 x i8] c"%s\0A\00" 23; CHECK: @[[FORMAT_STR:[a-zA-Z0-9_$"\\.-]+]] = constant [3 x i8] c"%s\00" 24; CHECK: @[[CHARSTR:[a-zA-Z0-9_$"\\.-]+]] = constant [2 x i8] c"a\00" 25; CHECK: @[[EMPTY:[a-zA-Z0-9_$"\\.-]+]] = constant [1 x i8] zeroinitializer 26; CHECK: @[[STR:[a-zA-Z0-9_$"\\.-]+]] = private unnamed_addr constant [12 x i8] c"hello world\00", align 1 27; CHECK: @[[STR_1:[a-zA-Z0-9_$"\\.-]+]] = private unnamed_addr constant [12 x i8] c"hello world\00", align 1 28; CHECK: @[[STR_2:[a-zA-Z0-9_$"\\.-]+]] = private unnamed_addr constant [12 x i8] c"hello world\00", align 1 29;. 30define void @test_simplify1() { 31; CHECK-LABEL: @test_simplify1( 32; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 104) 33; CHECK-NEXT: ret void 34; 35 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 36 call void (i8*, ...) @printf(i8* %fmt) 37 ret void 38} 39 40define void @test_simplify2() { 41; CHECK-LABEL: @test_simplify2( 42; CHECK-NEXT: [[PUTS:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i32 0, i32 0)) 43; CHECK-NEXT: ret void 44; 45 %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 46 call void (i8*, ...) @printf(i8* %fmt) 47 ret void 48} 49 50define void @test_simplify6() { 51; CHECK-LABEL: @test_simplify6( 52; CHECK-NEXT: [[PUTS:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0)) 53; CHECK-NEXT: ret void 54; 55 %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0 56 %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 57 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 58 ret void 59} 60 61define void @test_simplify7() { 62; CHECK-LABEL: @test_simplify7( 63; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 97) 64; CHECK-NEXT: ret void 65; 66 %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0 67 %str = getelementptr [2 x i8], [2 x i8]* @charstr, i32 0, i32 0 68 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 69 ret void 70} 71 72; printf("%s", "") --> noop 73 74define void @test_simplify8() { 75; CHECK-LABEL: @test_simplify8( 76; CHECK-NEXT: ret void 77; 78 %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0 79 %str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0 80 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 81 ret void 82} 83 84; printf("%s", str"\n") --> puts(str) 85 86define void @test_simplify9() { 87; CHECK-LABEL: @test_simplify9( 88; CHECK-NEXT: [[PUTS:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str.1, i32 0, i32 0)) 89; CHECK-NEXT: ret void 90; 91 %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0 92 %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 93 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 94 ret void 95} 96 97; printf("%s", "", ...) --> noop 98; printf("%s", "a", ...) --> putchar('a') 99; printf("%s", str"\n", ...) --> puts(str) 100 101define void @test_simplify10() { 102; CHECK-LABEL: @test_simplify10( 103; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 97) 104; CHECK-NEXT: [[PUTS:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str.2, i32 0, i32 0)) 105; CHECK-NEXT: ret void 106; 107 %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0 108 %str1 = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0 109 call void (i8*, ...) @printf(i8* %fmt, i8* %str1, i32 42, double 0x40091EB860000000) 110 %str2 = getelementptr [2 x i8], [2 x i8]* @charstr, i32 0, i32 0 111 call void (i8*, ...) @printf(i8* %fmt, i8* %str2, i32 42, double 0x40091EB860000000) 112 %str3 = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 113 call void (i8*, ...) @printf(i8* %fmt, i8* %str3, i32 42, double 0x40091EB860000000) 114 ret void 115} 116;. 117; CHECK: attributes #[[ATTR0:[0-9]+]] = { nofree nounwind } 118;. 119