Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/ThinLTO/X86/referenced_by_constant.ll

@@ -0,0 +1,32 @@
+; Do setup work for all below tests: generate bitcode and combined index
+; RUN: opt -module-summary %s -o %t.bc
+; RUN: opt -module-summary %p/Inputs/referenced_by_constant.ll -o %t2.bc
+; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
+
+; Check the import side: we currently only import bar() (with a future
+; enhancement to identify constants in the summary, we should mark
+; @someglobal/@someglobal2 for import as a local copy, which would
+; cause @referencedbyglobal and @localreferencedbyglobal to be exported
+; and promoted).
+; RUN: llvm-lto -thinlto-action=import %t.bc -thinlto-index=%t3.bc -o - | llvm-dis -o -   | FileCheck %s --check-prefix=IMPORT
+; IMPORT: @someglobal.llvm.0 = external hidden unnamed_addr constant
+; IMPORT: @someglobal2.llvm.0 = external hidden unnamed_addr constant
+; IMPORT: define available_externally void @bar()
+
+; Check the export side: we currently only export bar(), which causes
+; @someglobal and @someglobal2 to be promoted (see above).
+; RUN: llvm-lto -thinlto-action=promote %t2.bc -thinlto-index=%t3.bc -o - | llvm-dis -o -   | FileCheck %s --check-prefix=EXPORT
+; EXPORT: @someglobal.llvm.0 = hidden unnamed_addr constant
+; EXPORT: @someglobal2.llvm.0 = hidden unnamed_addr constant
+; EXPORT: define void @referencedbyglobal()
+; EXPORT: define internal void @localreferencedbyglobal()
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
+declare void @bar()
+
+define void @foo() {
+    call void @bar()
+    ret void
+}