1; Test that the printf library call simplifier works correctly. 2; 3; RUN: opt < %s -instcombine -S | FileCheck %s 4 5target 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" 6 7@hello_world = constant [13 x i8] c"hello world\0A\00" 8@h = constant [2 x i8] c"h\00" 9@percent_s = constant [4 x i8] c"%s\0A\00" 10@format_str = constant [3 x i8] c"%s\00" 11@charstr = constant [2 x i8] c"a\00" 12 13declare void @printf(i8*, ...) 14 15; Check simplification of printf with void return type. 16 17define void @test_simplify1() { 18; CHECK-LABEL: @test_simplify1( 19 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 20 call void (i8*, ...) @printf(i8* %fmt) 21; CHECK-NEXT: call i32 @putchar(i32 104) 22 ret void 23; CHECK-NEXT: ret void 24} 25 26define void @test_simplify2() { 27; CHECK-LABEL: @test_simplify2( 28 %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 29 call void (i8*, ...) @printf(i8* %fmt) 30; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @str, i32 0, i32 0)) 31 ret void 32; CHECK-NEXT: ret void 33} 34 35define void @test_simplify6() { 36; CHECK-LABEL: @test_simplify6( 37 %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0 38 %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 39 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 40; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0)) 41 ret void 42; CHECK-NEXT: ret void 43} 44 45define void @test_simplify7() { 46; CHECK-LABEL: @test_simplify7( 47 %fmt = getelementptr [3 x i8], [3 x i8]* @format_str, i32 0, i32 0 48 %str = getelementptr [2 x i8], [2 x i8]* @charstr, i32 0, i32 0 49 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 50; CHECK-NEXT: call i32 @putchar(i32 97) 51 ret void 52; CHECK-NEXT: ret void 53} 54