[asan] don't instrument functions with available_externally linkage. This saves a bit of compile time and reduces the number of redundant global strings generated by asan (https://code.google.com/p/address-sanitizer/issues/detail?id=167)
llvm-svn: 177250
diff --git a/llvm/test/Instrumentation/AddressSanitizer/basic.ll b/llvm/test/Instrumentation/AddressSanitizer/basic.ll
index c477b19..fb32e70 100644
--- a/llvm/test/Instrumentation/AddressSanitizer/basic.ll
+++ b/llvm/test/Instrumentation/AddressSanitizer/basic.ll
@@ -128,3 +128,15 @@
; CHECK: __asan_report_store_n{{.*}}, i64 10)
; CHECK: __asan_report_store_n{{.*}}, i64 10)
; CHECK: ret void
+
+; asan should not instrument functions with available_externally linkage.
+define available_externally i32 @f_available_externally(i32* %a) sanitize_address {
+entry:
+ %tmp1 = load i32* %a
+ ret i32 %tmp1
+}
+; CHECK: @f_available_externally
+; CHECK-NOT: __asan_report
+; CHECK: ret i32
+
+