__builtin_overload takes 2 or more arguments:
0) a non-zero constant-expr for the number of arguments the overloaded
functions will take
1) the arguments to pass to the matching overloaded function
2) a list of functions to match.
The return type of __builtin_overload is inferred from the function whose args
match the types of the arguments passed to the builtin. For example:
float a;
float sinf(float);
int sini(int);
float b = __builtin_overload(1, a, sini, sinf);
Says that we are overloading functions that take one argument, and trying to
pass an argument of the same type as 'a'. sini() does not match since it takes
and argument of type int. sinf does match, so at codegen time this will turn
into float b = sinf(a);
llvm-svn: 46132
Refactored the use of this method into both the Sema module and Analysis module,
which were using their own static functions that did the same thing.
llvm-svn: 46129
a method named ImpCastExprToType in Sema.
Use this method to insert implicit casts for case statements from their
operand type to the condition type of the switch. This fixes a crash on
test/CodeGen/statements.c, reported by Eli Friedman.
llvm-svn: 46083
- Modify Sema::UsualArithmeticConversions() to work with the new definition of Type::isComplexType().
This is a nice cleanup and also fixes a bug submitted by Eli (which I've added to the test suite).
llvm-svn: 46005
- Add Type::isComplexIntegerType(), Type::getAsComplexIntegerType().
- Don't inlude complex types with Type::isIntegerType(), which is too general.
- Use the new predicates in Sema::UsualArithmeticConversions() to recognize/convert the types.
llvm-svn: 45992
Remove diagnostics from Sema::CheckIndirectionOperand(). C89/C99 allow dereferencing an incomplete type. clang appears to be emulating some incorrect gcc behavior (see below).
void
foo (void)
{
struct b;
struct b* x = 0;
struct b* y = &*x; // gcc produces an error ("dereferencing pointer to incomplete type")
}
With this patch, the above is now allowed.
Bug/Patch by Eli Friedman!
llvm-svn: 45933
- Rename CheckInitializer() to CheckInitializerTypes().
- Removed the isStatic argument to CheckInitializerTypes() and all of it's subroutines. Checking for constant expressions is now done separately.
- Added CheckForConstantInitializer().
llvm-svn: 45840
Fix Sema::MergeFunctionDecl to allow for function type compatibility (by using the predicate on ASTContext). Function types don't have to be identical to be compatible...
llvm-svn: 45784
it from several places. This merges the diagnostics, making them more
uniform and fewer in number. This also simplifies and cleans up the code.
Some highlights:
1. This removes a bunch of very-similar diagnostics.
2. This renames AssignmentCheckResult -> AssignConvertType
3. This merges PointerFromInt + IntFromPointer which were always treated the same.
4. This updates a bunch of test cases that have minor changes to the produced diagnostics.
llvm-svn: 45589
Steve Naroff