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llvm-mirror/test/Transforms/NewGVN/null-aliases-nothing.ll
Arthur Eubanks fc1584be52 [NewPM][BasicAA] basicaa -> basic-aa in Transforms/{New,}GVN
Summary: Following https://reviews.llvm.org/D82607.

Reviewers: ychen

Subscribers: asbirlea, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82688
2020-06-26 20:28:18 -07:00

21 lines
461 B
LLVM

; RUN: opt < %s -basic-aa -newgvn -S | FileCheck %s
%t = type { i32 }
declare void @test1f(i8*)
define void @test1(%t* noalias %stuff ) {
%p = getelementptr inbounds %t, %t* %stuff, i32 0, i32 0
%before = load i32, i32* %p
call void @test1f(i8* null)
%after = load i32, i32* %p ; <--- This should be a dead load
%sum = add i32 %before, %after
store i32 %sum, i32* %p
ret void
; CHECK: load
; CHECK-NOT: load
; CHECK: ret void
}