llvm-project/clang/test/CodeGen/2008-07-22-packed-bitfield-...

// RUN: %clang_cc1 %s -emit-llvm -o -

int main (void) {
  struct foo {
    unsigned a:16;
    unsigned b:32 __attribute__ ((packed));
  } x;
  x.b = 0x56789abcL;
  return 0;
}
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 2009-12-16 04:14:24 +08:00			`// RUN: %clang_cc1 %s -emit-llvm -o -`
Fix bitfield accesses which straddle the boundary of the underlying type. - This generates somewhat less optimal code than before but this is not hard to rectify once stable (at the cost of slightly more complex code). - This currently always uses little-endian ordering of the bitfield. - This breaks the CodeGen/bitfield.c test because it was grepping for hard-coded assembly instructions. Will fix once a better test case is constructed (hard to do without execution). - This fixes SingleSource/UnitTests/2006-01-23-InitializedBitField.c and Regression/C/PR1386.c from the test suite. - <rdar://problem/6085090>, <rdar://problem/6094169> llvm-svn: 54395 2008-08-06 13:08:45 +08:00
A significant number of our tests in C accidentally use functions without prototypes. This patch converts the function signatures to have a prototype for the situations where the test is not specific to K&R C declarations. e.g., void func(); becomes void func(void); This is the ninth batch of tests being updated (there are a significant number of other tests left to be updated). 2022-02-13 21:02:46 +08:00			`int main (void) {`
Fix bitfield accesses which straddle the boundary of the underlying type. - This generates somewhat less optimal code than before but this is not hard to rectify once stable (at the cost of slightly more complex code). - This currently always uses little-endian ordering of the bitfield. - This breaks the CodeGen/bitfield.c test because it was grepping for hard-coded assembly instructions. Will fix once a better test case is constructed (hard to do without execution). - This fixes SingleSource/UnitTests/2006-01-23-InitializedBitField.c and Regression/C/PR1386.c from the test suite. - <rdar://problem/6085090>, <rdar://problem/6094169> llvm-svn: 54395 2008-08-06 13:08:45 +08:00			`struct foo {`
			`unsigned a:16;`
			`unsigned b:32 __attribute__ ((packed));`
			`} x;`
			`x.b = 0x56789abcL;`
			`return 0;`
			`}`