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 11declare void @printf(i8*, ...) 12 13; Check simplification of printf with void return type. 14 15define void @test_simplify1() { 16; CHECK-LABEL: @test_simplify1( 17 %fmt = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 18 call void (i8*, ...) @printf(i8* %fmt) 19; CHECK-NEXT: call i32 @putchar(i32 104) 20 ret void 21; CHECK-NEXT: ret void 22} 23 24define void @test_simplify2() { 25; CHECK-LABEL: @test_simplify2( 26 %fmt = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 27 call void (i8*, ...) @printf(i8* %fmt) 28; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @str, i32 0, i32 0)) 29 ret void 30; CHECK-NEXT: ret void 31} 32 33define void @test_simplify6() { 34; CHECK-LABEL: @test_simplify6( 35 %fmt = getelementptr [4 x i8], [4 x i8]* @percent_s, i32 0, i32 0 36 %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0 37 call void (i8*, ...) @printf(i8* %fmt, i8* %str) 38; CHECK-NEXT: call i32 @puts(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @hello_world, i32 0, i32 0)) 39 ret void 40; CHECK-NEXT: ret void 41} 42