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-rw-r--r--clang/test/PCH/pragma-weak.c10
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diff --git a/clang/test/PCH/pragma-weak.c b/clang/test/PCH/pragma-weak.c
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+++ b/clang/test/PCH/pragma-weak.c
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+// Test this without pch.
+// RUN: %clang_cc1 -include %S/pragma-weak.h %s -verify -emit-llvm -o - | FileCheck %s
+
+// Test with pch.
+// RUN: %clang_cc1 -x c-header -emit-pch -o %t %S/pragma-weak.h
+// RUN: %clang_cc1 -include-pch %t %s -verify -emit-llvm -o - | FileCheck %s
+
+// CHECK: @weakvar = weak global i32 0
+int weakvar;
+// expected-warning {{weak identifier 'undeclaredvar' never declared}}