1 files changed, 54 insertions, 0 deletions
diff --git a/test/ThinLTO/X86/lazyload_metadata.ll b/test/ThinLTO/X86/lazyload_metadata.ll
new file mode 100644
index 000000000000..3c4345831aa3
--- /dev/null
+++ b/test/ThinLTO/X86/lazyload_metadata.ll
@@ -0,0 +1,54 @@
+; Do setup work for all below tests: generate bitcode and combined index
+; RUN: opt -module-summary %s -o %t.bc -bitcode-mdindex-threshold=0
+; RUN: opt -module-summary %p/Inputs/lazyload_metadata.ll -o %t2.bc -bitcode-mdindex-threshold=0
+; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
+; REQUIRES: asserts
+
+; Check that importing @globalfunc1 does not trigger loading all the global
+; metadata for @globalfunc2 and @globalfunc3
+
+; RUN: llvm-lto -thinlto-action=import %t2.bc -thinlto-index=%t3.bc \
+; RUN:          -o /dev/null -stats \
+; RUN:  2>&1 | FileCheck %s -check-prefix=LAZY
+; LAZY: 49 bitcode-reader  - Number of Metadata records loaded
+; LAZY: 1 bitcode-reader  - Number of MDStrings loaded
+
+; RUN: llvm-lto -thinlto-action=import %t2.bc -thinlto-index=%t3.bc \
+; RUN:          -o /dev/null -disable-ondemand-mds-loading -stats \
+; RUN:  2>&1 | FileCheck %s -check-prefix=NOTLAZY
+; NOTLAZY: 58 bitcode-reader  - Number of Metadata records loaded
+; NOTLAZY: 8 bitcode-reader  - Number of MDStrings loaded
+
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
+define void @globalfunc1(i32 %arg) {
+  %tmp = add i32 %arg, 0, !metadata !2
+  ret void
+}
+
+; We need two functions here that will both reference the same metadata.
+; This is to force the metadata to be emitted in the global metadata block and
+; not in the function specific metadata.
+; These function are not imported and so we don't want to load their metadata.
+
+define void @globalfunc2(i32 %arg) {
+  %tmp = add i32 %arg, 0, !metadata !1
+  ret void
+}
+
+define void @globalfunc3(i32 %arg) {
+  %tmp = add i32 %arg, 0, !metadata !1
+  ret void
+}
+
+!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
+!2 = !{!"Hello World"}
+!3 = !{!"3"}
+!4 = !{!"4"}
+!5 = !{!"5"}
+!6 = !{!"6"}
+!7 = !{!"7"}
+!8 = !{!"8"}
+!9 = !{!"9"}