| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test that the puts library call simplifier works correctly. |
| ; |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| 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" |
| |
| @empty = constant [1 x i8] zeroinitializer |
| |
| declare i32 @puts(ptr) |
| |
| ; Check puts("") -> putchar('\n'). |
| |
| define void @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 10) |
| ; CHECK-NEXT: ret void |
| ; |
| call i32 @puts(ptr @empty) |
| ret void |
| } |
| |
| ; Don't simplify if the return value is used. |
| |
| define i32 @test_no_simplify1() { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; CHECK-NEXT: [[RET:%.*]] = call i32 @puts(ptr noundef nonnull dereferenceable(1) @empty) |
| ; CHECK-NEXT: ret i32 [[RET]] |
| ; |
| %ret = call i32 @puts(ptr @empty) |
| ret i32 %ret |
| } |