llvm-project/llvm/test/ThinLTO/X86/load-store-caching.ll

27 lines
1.2 KiB
LLVM

; Test that instruction operands from loads are not cached when
; processing stores. Reference from @foo to @obj should not be
; readonly or writeonly
; RUN: opt -module-summary %s -o %t.bc
; RUN: llvm-dis %t.bc -o - | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%struct.S = type { %struct.Derived* }
%struct.Derived = type { i32 }
%struct.Base = type { i32 }
@obj = dso_local local_unnamed_addr global %struct.S zeroinitializer, align 8
define dso_local %struct.Base* @foo() local_unnamed_addr {
entry:
%0 = load %struct.Base*, %struct.Base** bitcast (%struct.S* @obj to %struct.Base**), align 8
store %struct.Base* null, %struct.Base** bitcast (%struct.S* @obj to %struct.Base**), align 8
ret %struct.Base* %0
}
; CHECK: ^0 = module:
; CHECK-NEXT: ^1 = gv: (name: "obj", summaries: (variable: (module: ^0, flags: (linkage: external, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0), varFlags: (readonly: 1, writeonly: 1)))) ; guid =
; CHECK-NEXT: ^2 = gv: (name: "foo", summaries: (function: (module: ^0, flags: (linkage: external, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0), insts: 3, refs: (^1)))) ; guid =