llvm-project/clang/test/Sema/static-init.c

// RUN: %clang_cc1 -fsyntax-only -verify %s

typedef __typeof((int*) 0 - (int*) 0) intptr_t;

static int f = 10;
static int b = f; // expected-error {{initializer element is not a compile-time constant}}

float r  = (float) (intptr_t) &r; // expected-error {{initializer element is not a compile-time constant}}
intptr_t s = (intptr_t) &s;
_Bool t = &t;


union bar {
  int i;
};

struct foo {
  unsigned ptr;
};

union bar u[1];
struct foo x = {(intptr_t) u}; // no-error
struct foo y = {(char) u}; // expected-error {{initializer element is not a compile-time constant}}
Fix test to not force triple, and also to not need stdint.h. llvm-svn: 96499 2010-02-18 03:26:59 +08:00			`// RUN: %clang_cc1 -fsyntax-only -verify %s`
Throw the switch to exclusively use Evaluate (along with the small helper isConstantInitializer) to check whether an initializer is constant. This passes tests, but it's possible that it'll cause regressions with real-world code. Future work: 1. The diagnostics obtained this way are lower quality at the moment; some work both here and in Evaluate is needed for accurate diagnostics. 2. We probably need some extra code when we're in -pedantic mode so we can strictly enforce the rules in C99 6.6p7. 3. Dead code cleanup (this should wait until after 2, because we might want to re-use some of the code). llvm-svn: 65265 2009-02-22 14:45:27 +08:00
Fix test to not force triple, and also to not need stdint.h. llvm-svn: 96499 2010-02-18 03:26:59 +08:00			`typedef __typeof((int) 0 - (int) 0) intptr_t;`
Throw the switch to exclusively use Evaluate (along with the small helper isConstantInitializer) to check whether an initializer is constant. This passes tests, but it's possible that it'll cause regressions with real-world code. Future work: 1. The diagnostics obtained this way are lower quality at the moment; some work both here and in Evaluate is needed for accurate diagnostics. 2. We probably need some extra code when we're in -pedantic mode so we can strictly enforce the rules in C99 6.6p7. 3. Dead code cleanup (this should wait until after 2, because we might want to re-use some of the code). llvm-svn: 65265 2009-02-22 14:45:27 +08:00
Generate code for static variables that don't have initializers. Also, report an error if a static initializer is not constant. llvm-svn: 43058 2007-10-17 08:52:43 +08:00			`static int f = 10;`
wrap some long diagnostics, make 'initializer is not a constant' diagnostic a bit more clear (rdar://5646070) llvm-svn: 54606 2008-08-10 09:58:45 +08:00			`static int b = f; // expected-error {{initializer element is not a compile-time constant}}`
Allow a pointer implicitly cast to a bool as a constant expression, as required by the standard (the standard doesn't know anything about implicit casts). Disallow pointers cast to non-integral arithmetic types as constant expressions. This was previously allowed by accident. llvm-svn: 51779 2008-05-31 02:14:48 +08:00
PR4013 and PR4105: pointer-like types can only be cast to/from integers and other pointer-like types. llvm-svn: 70531 2009-05-01 10:23:58 +08:00			`float r = (float) (intptr_t) &r; // expected-error {{initializer element is not a compile-time constant}}`
Throw the switch to exclusively use Evaluate (along with the small helper isConstantInitializer) to check whether an initializer is constant. This passes tests, but it's possible that it'll cause regressions with real-world code. Future work: 1. The diagnostics obtained this way are lower quality at the moment; some work both here and in Evaluate is needed for accurate diagnostics. 2. We probably need some extra code when we're in -pedantic mode so we can strictly enforce the rules in C99 6.6p7. 3. Dead code cleanup (this should wait until after 2, because we might want to re-use some of the code). llvm-svn: 65265 2009-02-22 14:45:27 +08:00			`intptr_t s = (intptr_t) &s;`
Allow a pointer implicitly cast to a bool as a constant expression, as required by the standard (the standard doesn't know anything about implicit casts). Disallow pointers cast to non-integral arithmetic types as constant expressions. This was previously allowed by accident. llvm-svn: 51779 2008-05-31 02:14:48 +08:00			`_Bool t = &t;`
allow cast from array to int to be considered as constant llvm-svn: 63519 2009-02-03 00:07:41 +08:00

			`union bar {`
Remove tabs, and whitespace cleanups. llvm-svn: 81346 2009-09-09 23:08:12 +08:00			`int i;`
allow cast from array to int to be considered as constant llvm-svn: 63519 2009-02-03 00:07:41 +08:00			`};`

			`struct foo {`
Remove tabs, and whitespace cleanups. llvm-svn: 81346 2009-09-09 23:08:12 +08:00			`unsigned ptr;`
allow cast from array to int to be considered as constant llvm-svn: 63519 2009-02-03 00:07:41 +08:00			`};`

			`union bar u[1];`
Throw the switch to exclusively use Evaluate (along with the small helper isConstantInitializer) to check whether an initializer is constant. This passes tests, but it's possible that it'll cause regressions with real-world code. Future work: 1. The diagnostics obtained this way are lower quality at the moment; some work both here and in Evaluate is needed for accurate diagnostics. 2. We probably need some extra code when we're in -pedantic mode so we can strictly enforce the rules in C99 6.6p7. 3. Dead code cleanup (this should wait until after 2, because we might want to re-use some of the code). llvm-svn: 65265 2009-02-22 14:45:27 +08:00			`struct foo x = {(intptr_t) u}; // no-error`
emit diagnostic when casting a ptr to a small int when doing static initialization (addresses Eli's comments I believe) llvm-svn: 63562 2009-02-03 06:57:15 +08:00			`struct foo y = {(char) u}; // expected-error {{initializer element is not a compile-time constant}}`