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5 Commits

Author SHA1 Message Date
Chandler Carruth e54ff6cc3e Expand the coverage of the warning for constants on the RHS of logical operands: 
return f() || -1;

where the user meant to write '|'.

This bootstraps without any additional warnings.

Patch by Richard Trieu.

llvm-svn: 132327
 2011-05-31 05:41:42 +00:00
Chris Lattner 938533db60 turn down the logical bitwise confusion warning to not warn 
when the RHS of the ||/&& is ever 0 or 1.  This handles a variety of
creative idioms for "true" used in C programs and fixes many false 
positives at the expense of a few false negatives.  This fixes
rdar://8230351.

llvm-svn: 109314
 2010-07-24 01:10:11 +00:00
Chris Lattner 8406c5197b Add a warning to catch a bug recently caught by code review, like this: 
t2.c:2:12: warning: use of logical && with constant operand; switch to bitwise &
      or remove constant [-Wlogical-bitwise-confusion]
  return x && 4;
           ^  ~

wording improvement suggestions are welcome.

llvm-svn: 108260
 2010-07-13 19:41:32 +00:00
Daniel Dunbar 8fbe78f6fc 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
Eli Friedman 274ab904d0 Avoid assert-crash in a case where the expression passed to EmitConstantExpr 
legitimately has side-effects (and needs to be generated as a non-constant).

llvm-svn: 88767
 2009-11-14 08:51:33 +00:00