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llvm-project/clang/test/PCH/fuzzy-pch.c

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Allow some differences between the predefines buffer used to build a PCH file and the predefines buffer used when including the PCH file. We (explicitly) detect conflicting macro definitions (rejecting the PCH file) and about missing macro definitions (they'll be automatically pulled from the PCH file anyway). We're missing some checking to make sure that new macro definitions won't have any impact on the PCH file itself (e.g., #define'ing an identifier that the PCH file used). llvm-svn: 70316
2009-04-29 02:58:38 +08:00
// Test with pch.
Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'. - This is designed to make it obvious that %clang_cc1 is a "test variable" which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it can be useful to redefine what gets run as 'clang -cc1' (for example, to set a default target). llvm-svn: 91446
2009-12-16 04:14:24 +08:00
// RUN: %clang_cc1 -emit-pch -DFOO -o %t %S/variables.h
// RUN: %clang_cc1 -DBAR=int -include-pch %t -fsyntax-only -pedantic %s
Teach the PCH validator to check the preprocessor options, especially the macros that are #define'd or #undef'd on the command line. This checking happens much earlier than the current macro-definition checking and is far cleaner, because it does a direct comparison rather than a diff of the predefines buffers. Moreover, it allows us to use the result of this check to skip over PCH files within a directory that have non-matching -D's or -U's on the command line. Finally, it improves the diagnostics a bit for mismatches, fixing <rdar://problem/8612222>. The old predefines-buffer diff'ing will go away in a subsequent commit. llvm-svn: 166641
2012-10-25 07:41:50 +08:00
// RUN: %clang_cc1 -DFOO -DBAR=int -include-pch %t %s
// RUN: not %clang_cc1 -DFOO=blah -DBAR=int -include-pch %t %s 2> %t.err
// RUN: FileCheck -check-prefix=CHECK-FOO %s < %t.err
// RUN: not %clang_cc1 -UFOO -include-pch %t %s 2> %t.err
// RUN: FileCheck -check-prefix=CHECK-NOFOO %s < %t.err
// RUN: not %clang_cc1 -DFOO -undef -include-pch %t %s 2> %t.err
// RUN: FileCheck -check-prefix=CHECK-UNDEF %s < %t.err
Allow some differences between the predefines buffer used to build a PCH file and the predefines buffer used when including the PCH file. We (explicitly) detect conflicting macro definitions (rejecting the PCH file) and about missing macro definitions (they'll be automatically pulled from the PCH file anyway). We're missing some checking to make sure that new macro definitions won't have any impact on the PCH file itself (e.g., #define'ing an identifier that the PCH file used). llvm-svn: 70316
2009-04-29 02:58:38 +08:00
BAR bar = 17;
#ifndef FOO
# error FOO was not defined
#endif
#if FOO != 1
# error FOO has the wrong definition
#endif
#ifndef BAR
# error BAR was not defined
#endif
Teach the PCH validator to check the preprocessor options, especially the macros that are #define'd or #undef'd on the command line. This checking happens much earlier than the current macro-definition checking and is far cleaner, because it does a direct comparison rather than a diff of the predefines buffers. Moreover, it allows us to use the result of this check to skip over PCH files within a directory that have non-matching -D's or -U's on the command line. Finally, it improves the diagnostics a bit for mismatches, fixing <rdar://problem/8612222>. The old predefines-buffer diff'ing will go away in a subsequent commit. llvm-svn: 166641
2012-10-25 07:41:50 +08:00
// CHECK-FOO: definition of macro 'FOO' differs between the precompiled header ('1') and the command line ('blah')
// CHECK-NOFOO: macro 'FOO' was defined in the precompiled header but undef'd on the command line
// CHECK-UNDEF: command line contains '-undef' but precompiled header was not built with it