llvm/test/Transforms/NewGVN/null-aliases-nothing.ll


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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt < %s -passes=newgvn -S | FileCheck %s

%t = type { i32 }
declare void @test1f(ptr)

define void @test1(ptr noalias %stuff ) {
; CHECK-LABEL: define void @test1(
; CHECK-SAME: ptr noalias [[STUFF:%.*]]) {
; CHECK-NEXT:    [[BEFORE:%.*]] = load i32, ptr [[STUFF]], align 4
; CHECK-NEXT:    call void @test1f(ptr null)
; CHECK-NEXT:    [[SUM:%.*]] = add i32 [[BEFORE]], [[BEFORE]]
; CHECK-NEXT:    store i32 [[SUM]], ptr [[STUFF]], align 4
; CHECK-NEXT:    ret void
;
  %before = load i32, ptr %stuff

  call void @test1f(ptr null)

  %after = load i32, ptr %stuff ; <--- This should be a dead load
  %sum = add i32 %before, %after

  store i32 %sum, ptr %stuff
  ret void
}