Commit Graph

20 Commits

Author SHA1 Message Date
Richard Smith c3e31e7bb2 In accordance with the C89, C99 and C++98 standards, ICEs can only contain
floating-point literals if they are the immediate operands of casts.
ImplicitCastExpr is not a cast in the language-standards sense.

llvm-svn: 142832
2011-10-24 18:26:35 +00:00
Matt Beaumont-Gay 0a0ba9d883 Add fixit notes for -Wconstant-logical-operand.
llvm-svn: 137620
2011-08-15 17:50:06 +00:00
Chris Lattner f35de48c90 when compiling in a GNU mode (e.g. gnu99) treat VLAs with a size that can be folded to a constant
as constant size arrays.  This has slightly different semantics in some insane cases, but allows
us to accept some constructs that GCC does.  Continue to be pedantic in -std=c99 and other
modes.  This addressed rdar://8733881 - error "variable-sized object may not be initialized"; g++ accepts same code

llvm-svn: 132983
2011-06-14 06:38:10 +00:00
John McCall 4b13633082 Don't crash during constant-evaluation of 1/(1/0). PR9262.
llvm-svn: 126541
2011-02-26 08:27:17 +00:00
Ted Kremenek 3427fac7c8 Enhance Sema::DiagRuntimeBehavior() to delay some diagnostics to see if the related code is reachable. This suppresses some
diagnostics that occur in unreachable code (e.g., -Warray-bound).

We only pay the cost of doing the reachability analysis when we issue one of these diagnostics.

llvm-svn: 126290
2011-02-23 01:52:04 +00:00
Chandler Carruth b19289331d This really seems like a boring set of fixes to our tests to make them more
independent of the underlying system. Let me know if any of these are too
aggressive.

llvm-svn: 119345
2010-11-16 10:26:08 +00:00
Abramo Bagnara 718dbd7a4f Fixed __builtin_constant_p return type.
llvm-svn: 116145
2010-10-09 04:51:06 +00:00
Argyrios Kyrtzidis 40cec8326c Revert r114316, -Wunused-value enabled by default was intended.
llvm-svn: 114318
2010-09-19 23:03:35 +00:00
Argyrios Kyrtzidis 3698bf1c6d Make -Wunused-value off by default, matching GCC. Fixes rdar://7126194.
llvm-svn: 114316
2010-09-19 21:21:44 +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
Argyrios Kyrtzidis 639ffb0c07 Fix rdar://8139785 "implement warning on dead expression in comma operator"
As a bonus, fix the warning for || and && operators; it was emitted even if one of the operands had side effects, e.g:

x || test_logical_foo1();

emitted a bogus "expression result unused" for 'x'.

llvm-svn: 107274
2010-06-30 10:53:14 +00:00
Chris Lattner faa5417264 implement PR6004, warning about divide and remainder by zero.
llvm-svn: 93256
2010-01-12 21:23:57 +00:00
Daniel Dunbar 5618e98f33 Update tests to use %clang instead of 'clang', and forcibly disable use of '
clang ' or ' clang -cc1 ' or ' clang-cc ' in test lines (by substituting them to
garbage).

llvm-svn: 91460
2009-12-15 22:01:24 +00:00
Daniel Dunbar 633d5b3ee2 Use clang to run tests which include headers from the system.
llvm-svn: 89085
2009-11-17 10:14:55 +00:00
Eli Friedman 2b680b43e9 Simplify the scheme used for keywords, and change the classification
scheme to be more useful.

The new scheme introduces a set of categories that should be more 
readable, and also reflects what we want to consider as an extension 
more accurately.  Specifically, it makes the "what is a keyword" 
determination accurately reflect whether the keyword is a GNU or 
Microsoft extension.

I also introduced separate flags for keyword aliases; this is useful 
because the classification of the aliases is mostly unrelated to the 
classification of the original keyword.

This patch treats anything that's in the implementation 
namespace (prefixed with "__", or "_X" where "X" is any upper-case 
letter) as a keyword without marking it as an extension.  This is 
consistent with the standards in that an implementation is allowed to define 
arbitrary extensions in the implementation namespace without violating 
the standard. This gets rid of all the nasty "extension used" warnings 
for stuff like __attribute__ in -pedantic mode.  We still warn for 
extensions outside of the the implementation namespace, like typeof.
If someone wants to implement -Wextensions or something like that, we 
could add additional information to the keyword table.

This also removes processing for the unused "Boolean" language option; 
such an extension isn't supported on any other C implementation, so I 
don't see any point to adding it.

The changes to test/CodeGen/inline.c are required because previously, we 
weren't actually disabling the "inline" keyword in -std=c89 mode.

I'll remove Boolean and NoExtensions from LangOptions in a follow-up 
commit.

llvm-svn: 70281
2009-04-28 03:13:54 +00:00
Eli Friedman 7524de1da2 Change isNullPointerConstant to be strict; hopefully this won't cause
any issues now that we have our own tgmath.h.

llvm-svn: 70090
2009-04-25 22:37:12 +00:00
Daniel Dunbar a45cf5b6b0 Rename clang to clang-cc.
Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
2009-03-24 02:24:46 +00:00
Eli Friedman 8d03f59479 Some additional ICE tests.
llvm-svn: 65614
2009-02-27 04:46:32 +00:00
Chris Lattner 04397358ec Implement the final (hopefully) wrinkle to i-c-e + builtin_constant_p
processing: it allows arbitrary foldable constants as the operand of ?: when
builtin_constant_p is the condition.

llvm-svn: 60954
2008-12-12 18:00:51 +00:00
Chris Lattner 4bf85ffe83 merge these testcases into one file.
llvm-svn: 60936
2008-12-12 07:01:24 +00:00