1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test that the puts library call simplifier works correctly.
4 ; RUN: opt < %s -instcombine -S | FileCheck %s
6 target 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"
8 @empty = constant [1 x i8] zeroinitializer
10 declare i32 @puts(i8*)
12 ; Check puts("") -> putchar('\n').
14 define void @test_simplify1() {
15 ; CHECK-LABEL: @test_simplify1(
16 ; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 10)
17 ; CHECK-NEXT: ret void
19 %str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
20 call i32 @puts(i8* %str)
24 ; Don't simplify if the return value is used.
26 define i32 @test_no_simplify1() {
27 ; CHECK-LABEL: @test_no_simplify1(
28 ; CHECK-NEXT: [[RET:%.*]] = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([1 x i8], [1 x i8]* @empty, i32 0, i32 0))
29 ; CHECK-NEXT: ret i32 [[RET]]
31 %str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
32 %ret = call i32 @puts(i8* %str)