From fae436326559f3e93944dc4d150fb945dc12097b Mon Sep 17 00:00:00 2001
From: Ewan Crawford <ewan@codeplay.com>
Date: Tue, 15 Mar 2016 13:02:11 +0000
Subject: [PATCH] Add regression test for expressions calling functions taking
 anonymous struct typedef arguments

This CL adds a regression test for the bug listed at https://llvm.org/bugs/show_bug.cgi?id=26790
Functionality was implemented in commit r263544

Author: Luke Drummond <luke.drummond@codeplay.com>
Differential Revision: http://reviews.llvm.org/D17777

llvm-svn: 263547
---
 .../expression_command/anonymous-struct/Makefile   | 12 +++++++
 .../anonymous-struct/TestCallUserAnonTypedef.py    | 40 ++++++++++++++++++++++
 .../expression_command/anonymous-struct/main.cpp   | 26 ++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/Makefile
 create mode 100644 lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/TestCallUserAnonTypedef.py
 create mode 100644 lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/main.cpp

diff --git a/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/Makefile b/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/Makefile
new file mode 100644
index 0000000..7df664a
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/Makefile
@@ -0,0 +1,12 @@
+LEVEL = ../../make
+
+CXX_SOURCES := main.cpp
+
+# clang-3.5+ outputs FullDebugInfo by default for Darwin/FreeBSD
+# targets.  Other targets do not, which causes this test to fail.
+# This flag enables FullDebugInfo for all targets.
+ifneq (,$(findstring clang,$(CC)))
+  CFLAGS_EXTRAS += -fno-limit-debug-info
+endif
+
+include $(LEVEL)/Makefile.rules
diff --git a/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/TestCallUserAnonTypedef.py b/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/TestCallUserAnonTypedef.py
new file mode 100644
index 0000000..4ee08d4
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/TestCallUserAnonTypedef.py
@@ -0,0 +1,40 @@
+"""
+Test calling user defined functions using expression evaluation.
+This test checks that typesystem lookup works correctly for typedefs of
+untagged structures.
+
+Ticket: https://llvm.org/bugs/show_bug.cgi?id=26790
+"""
+
+from __future__ import print_function
+
+import lldb
+
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestExprLookupAnonStructTypedef(TestBase):
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        TestBase.setUp(self)
+        # Find the breakpoint
+        self.line = line_number('main.cpp', '// lldb testsuite break')
+
+    def test(self):
+        """Test typedeffed untagged struct arguments for function call expressions"""
+        self.build()
+
+        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
+        lldbutil.run_break_set_by_file_and_line(
+            self,
+            "main.cpp",
+            self.line,
+            num_expected_locations=-1,
+            loc_exact=True
+        )
+
+        self.runCmd("run", RUN_SUCCEEDED)
+        self.expect("expr multiply(&s)", substrs=['$0 = 1'])
diff --git a/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/main.cpp b/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/main.cpp
new file mode 100644
index 0000000..5b170c5
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/expression_command/anonymous-struct/main.cpp
@@ -0,0 +1,26 @@
+#include <tgmath.h>
+
+typedef struct {
+    float f;
+    int i;
+} my_untagged_struct;
+
+double multiply(my_untagged_struct *s)
+{
+    return s->f * s->i;
+}
+
+double multiply(my_untagged_struct *s, int x)
+{
+    return multiply(s) * x;
+}
+
+int main(int argc, char **argv)
+{
+    my_untagged_struct s = {
+        .f = (float)argc,
+        .i = argc,
+    };
+    // lldb testsuite break
+    return !(multiply(&s, argc) == pow(argc, 3));
+}
-- 
2.7.4