llvm-project/llvm/test/Transforms/InstCombine/puts-1.ll

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

35 lines
1.1 KiB
LLVM
Raw Normal View History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Test that the puts library call simplifier works correctly.
;
; RUN: opt < %s -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(i8*)
; Check puts("") -> putchar('\n').
define void @test_simplify1() {
; CHECK-LABEL: @test_simplify1(
; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 10)
; CHECK-NEXT: ret void
;
%str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
call i32 @puts(i8* %str)
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(i8* nonnull dereferenceable(1) getelementptr inbounds ([1 x i8], [1 x i8]* @empty, i32 0, i32 0))
; CHECK-NEXT: ret i32 [[RET]]
;
%str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
%ret = call i32 @puts(i8* %str)
ret i32 %ret
}