[dsymutil] Discard useless location attributes.

[oota-llvm.git] / test / tools / dsymutil / X86 / dead-stripped.cpp

diff --git a/test/tools/dsymutil/X86/dead-stripped.cpp b/test/tools/dsymutil/X86/dead-stripped.cpp
new file mode 100644 (file)
index 0000000..ecab758
--- /dev/null
+++ b/test/tools/dsymutil/X86/dead-stripped.cpp
@@ -0,0 +1,48 @@
+// RUN: llvm-dsymutil -f -y %p/dummy-debug-map.map -oso-prepend-path %p/../Inputs/dead-stripped -o - | llvm-dwarfdump - -debug-dump=info | FileCheck %s
+
+// The test was compiled with:
+// clang++ -O2 -g -c dead-strip.cpp -o 1.o
+
+// The goal of the test is to exercise dsymutil's behavior in presence of
+// functions/variables that have been dead-stripped by the linker but
+// that are still present in the linked debug info (in this case because
+// they have been DW_TAG_import'd in another namespace).
+
+// Everything in the N namespace bellow doesn't have a debug map entry, and
+// thus is considered dead (::foo() has a debug map entry, otherwse dsymutil
+// would just drop the CU altogether).
+
+namespace N {
+int blah = 42;
+// This is actually a dsymutil-classic bug that we reproduced
+// CHECK: DW_TAG_variable
+// CHECK-NOT: DW_TAG
+// CHECK: DW_AT_location
+
+__attribute__((always_inline)) int foo() { return blah; }
+// CHECK: DW_TAG_subprogram
+// CHECK-NOT: DW_AT_low_pc
+// CHECK-NOT: DW_AT_high_pc
+// CHECK: DW_AT_frame_base
+
+// CHECK: DW_TAG_subprogram
+
+int bar(unsigned i) {
+       int val = foo();
+       if (i)
+               return val + bar(i-1);
+       return foo();
+}
+// CHECK: DW_TAG_subprogram
+// CHECK-NOT: DW_AT_low_pc
+// CHECK-NOT: DW_AT_high_pc
+// CHECK: DW_AT_frame_base
+// CHECK-NOT: DW_AT_location
+// CHECK-NOT: DW_AT_low_pc
+// CHECK-NOT: DW_AT_high_pc
+
+}
+// CHECK: TAG_imported_module
+using namespace N;
+
+void foo() {}