3 Commits

Author	SHA1	Message	Date
Richard Smith	5b2f7c5f60	If preprocessing results in a token with leading whitespace that was expanded ... from a macro in column 0, ensure that we print whitespace before it in the -E output. Patch by Harald van Dijk! llvm-svn: 202070	2014-02-24 20:50:36 +00:00
Richard Smith	f2baa70396	If the first token in a macro that appears at the start of a line expands to ... nothing, be sure to inform the *next* token expanded from the macro that it is now at the start of a line. Patch by Harald van Dijk! llvm-svn: 202068	2014-02-24 20:45:00 +00:00
Eli Friedman	0834a4b901	Make Preprocessor::Lex non-recursive. ... Before this patch, Lex() would recurse whenever the current lexer changed (e.g. upon entry into a macro). This patch turns the recursion into a loop: the various lex routines now don't return a token when the current lexer changes, and at the top level Preprocessor::Lex() now loops until it finds a token. Normally, the recursion wouldn't end up being very deep, but the recursion depth can explode in edge cases like a bunch of consecutive macros which expand to nothing (like in the testcase test/Preprocessor/macro_expand_empty.c in this patch). <rdar://problem/14569770> llvm-svn: 190980	2013-09-19 00:41:32 +00:00