llvm-svn: 46000

incorrectly apply the multiple include optimization to files with 
guards like:

#if !defined(x) MACRO

where MACRO could expand to different things in different contexts.
Thanks Neil!

llvm-svn: 45716

llvm-svn: 44917

llvm-svn: 44916

not the start of a logical line.  Be careful about this distinction, which 
affects when newlines are printed and when paste-avoidance happens, etc.  
This fixes PR1848, thanks to Neil for noticing this!

llvm-svn: 44743

Neil, please review this fix.

llvm-svn: 44285

llvm-svn: 44178

so that we don't emit an error on the #endif.  Suggestion by Neil.

llvm-svn: 42258

it did not handle <xyz> headers coming from macro expansions.
This requires special treatment, as the include name is lexed
as multiple tokens, which require reassembly before processing.

llvm-svn: 40418

#define t(x) #x
t(a
c)

to "a c", not "ac".

llvm-svn: 40060

a function-like macro invocation.  Patch contributed by Neil Booth.

llvm-svn: 40026

implements test/Preprocessor/expr_usual_conversions.c, which produces this
output:

expr_usual_conversions.c:5:10: warning: left side of operator converted from negative value to unsigned: -42 to 18446744073709551574
#if (-42 + 0U) / -2
         ^
expr_usual_conversions.c:5:16: warning: right side of operator converted from negative value to unsigned: -2 to 18446744073709551614
#if (-42 + 0U) / -2
               ^

llvm-svn: 39406

llvm-svn: 39401

test/Preprocessor/cxx_true.cpp

llvm-svn: 39399

llvm-svn: 39396

llvm-svn: 39246

llvm-svn: 39215

llvm-svn: 39214

llvm-svn: 39068

llvm-svn: 39054

llvm-svn: 39053

llvm-svn: 39020

llvm-svn: 38982

llvm-svn: 38981

llvm-svn: 38953

llvm-svn: 38829

llvm-svn: 38799

llvm-svn: 38798

llvm-svn: 38794

llvm-svn: 38792

llvm-svn: 38790

llvm-svn: 38789

llvm-svn: 38788

llvm-svn: 38786

llvm-svn: 38785

llvm-svn: 38779

llvm-svn: 38777

llvm-svn: 38775

llvm-svn: 38768

llvm-svn: 38766