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llvm-project/clang/test/Preprocessor/comment_save.c

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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
2009-12-15 20:14:24 +00:00
// RUN: %clang_cc1 -E -C %s | FileCheck -strict-whitespace %s
[Preprocessor] Implement -fminimize-whitespace. This patch adds the -fminimize-whitespace with the following effects: * If combined with -E, remove as much non-line-breaking whitespace as possible. * If combined with -E -P, removes as much whitespace as possible, including line-breaks. The motivation is to reduce the amount of insignificant changes in the preprocessed output with source files where only whitespace has been changed (add/remove comments, clang-format, etc.) which is in particular useful with ccache. A patch for ccache for using this flag has been proposed to ccache as well: https://github.com/ccache/ccache/pull/815, which will use -fnormalize-whitespace when clang-13 has been detected, and additionally uses -P in "unify_mode". ccache already had a unify_mode in an older version which was removed because of problems that using the preprocessor itself does not have (such that the custom tokenizer did not recognize C++11 raw strings). This patch slightly reorganizes which part is responsible for adding newlines that are required for semantics. It is now either startNewLineIfNeeded() or MoveToLine() but never both; this avoids the ShouldUpdateCurrentLine workaround and avoids redundant lines being inserted in some cases. It also fixes a mandatory newline not inserted after a _Pragma("...") that is expanded into a #pragma. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D104601
2021-07-25 21:39:08 -05:00
// RUN: %clang_cc1 -E -C -fminimize-whitespace %s | FileCheck -strict-whitespace %s
Testcases for comment saving modes, -C and -CC. llvm-svn: 38785
2006-07-29 06:41:10 +00:00
// foo
Convert Preprocessor Clang tests to FileCheck in regards to PR5307. llvm-svn: 85199
2009-10-27 02:36:32 +00:00
// CHECK: // foo
Testcases for comment saving modes, -C and -CC. llvm-svn: 38785
2006-07-29 06:41:10 +00:00
Convert Preprocessor Clang tests to FileCheck in regards to PR5307. llvm-svn: 85199
2009-10-27 02:36:32 +00:00
/* bar */
// CHECK: /* bar */
Testcases for comment saving modes, -C and -CC. llvm-svn: 38785
2006-07-29 06:41:10 +00:00
Fix PR13065. This condition (added in r158093) was overly conservative. llvm-svn: 158483
2012-06-15 00:47:13 +00:00
#if FOO
#endif
/* baz */
// CHECK: /* baz */
[-E] Emit a rewritten _Pragma on its own line. 1. Teach Lexer that pragma lexers are like macro expansions at EOF. 2. Treat pragmas like #define/#undef when printing. 3. If we just printed a directive, add a newline before any more tokens. (4. Miscellaneous cleanup in PrintPreprocessedOutput.cpp) PR10594 and <rdar://problem/11562490> (two separate related problems) llvm-svn: 158571
2012-06-15 23:33:51 +00:00
_Pragma("unknown") // after unknown pragma
// CHECK: #pragma unknown
// CHECK-NEXT: #
// CHECK-NEXT: // after unknown pragma
_Pragma("comment(\"abc\")") // after known pragma
// CHECK: #pragma comment("abc")
// CHECK-NEXT: #
// CHECK-NEXT: // after known pragma
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