[Modules][PCH] Serialize #pragma pack

This patch serializes the state of #pragma pack. It preserves the state of the
pragma from a PCH/from modules in a file that uses that PCH/those modules.

rdar://21359084

Differential Revision: https://reviews.llvm.org/D31241

llvm-svn: 299226

1 files changed, 90 insertions, 0 deletions

diff --git a/clang/test/PCH/pragma-pack.c b/clang/test/PCH/pragma-pack.c
new file mode 100644
index 00000000000..47a55700235
--- /dev/null
+++ b/clang/test/PCH/pragma-pack.c
@@ -0,0 +1,90 @@
+// Test this without pch.
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -include %s -verify -fsyntax-only -DSET
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -include %s -verify -fsyntax-only -DRESET
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -include %s -verify -fsyntax-only -DPUSH
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -include %s -verify -fsyntax-only -DPUSH_POP
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -include %s -verify -fsyntax-only -DPUSH_POP_LABEL
+
+// Test with pch.
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DSET -emit-pch -o %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DSET -verify -include-pch %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DRESET -emit-pch -o %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DRESET -verify -include-pch %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DPUSH -emit-pch -o %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DPUSH -verify -include-pch %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DPUSH_POP -emit-pch -o %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DPUSH_POP -verify -include-pch %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DPUSH_POP_LABEL -emit-pch -o %t
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -DPUSH_POP_LABEL -verify -include-pch %t
+
+#ifndef HEADER
+#define HEADER
+
+#ifdef SET
+#pragma pack(1)
+#endif
+
+#ifdef RESET
+#pragma pack(2)
+#pragma pack ()
+#endif
+
+#ifdef PUSH
+#pragma pack(1)
+#pragma pack (push, 2)
+#endif
+
+#ifdef PUSH_POP
+#pragma pack (push, 4)
+#pragma pack (push, 2)
+#pragma pack (pop)
+#endif
+
+#ifdef PUSH_POP_LABEL
+#pragma pack (push, a, 4)
+#pragma pack (push, b, 1)
+#pragma pack (push, c, 2)
+#pragma pack (pop, b)
+#endif
+
+#else
+
+#ifdef SET
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 1}}
+#pragma pack(pop) // expected-warning {{#pragma pack(pop, ...) failed: stack empty}}
+#endif
+
+#ifdef RESET
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 8}}
+#pragma ()
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 8}}
+#endif
+
+#ifdef PUSH
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 2}}
+#pragma pack(pop)
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 1}}
+#pragma pack ()
+#pragma pack (show) // expected-warning {{value of #pragma pack(show) == 8}}
+#pragma pack(pop) // expected-warning {{#pragma pack(pop, ...) failed: stack empty}}
+#endif
+
+#ifdef PUSH_POP
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 4}}
+#pragma pack(pop)
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 8}}
+#pragma pack(pop) // expected-warning {{#pragma pack(pop, ...) failed: stack empty}}
+#endif
+
+#ifdef PUSH_POP_LABEL
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 4}}
+#pragma pack(pop, c)
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 4}}
+#pragma pack(pop, a)
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 8}}
+#pragma pack(pop)  // expected-warning {{#pragma pack(pop, ...) failed: stack empty}}
+#pragma pack(pop, b) // expected-warning {{#pragma pack(pop, ...) failed: stack empty}}
+#pragma pack(show) // expected-warning {{value of #pragma pack(show) == 8}}
+#endif
+
+#endif