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libcpp: testsuite: Add test for fixed _Pragma bug [PR82335]

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This PR was fixed by r12-4797 and r12-5454. Add test coverage from the PR
that is not represented elsewhere.

gcc/testsuite/ChangeLog:

	PR preprocessor/82335
	* c-c++-common/cpp/diagnostic-pragma-3.c: New test.
This commit is contained in:
Lewis Hyatt 2023-10-02 14:56:58 -04:00
parent 217a0fcb85
commit 202a214d68
1 changed files with 37 additions and 0 deletions
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37
gcc/testsuite/c-c++-common/cpp/diagnostic-pragma-3.c Normal file
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/* This is like diagnostic-pragma-2.c, but handles the case where everything
is wrapped inside a macro, which previously caused additional issues tracked
in PR preprocessor/82335. */
/* { dg-do compile } */
/* { dg-additional-options "-save-temps -Wattributes -Wtype-limits" } */
#define B _Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wattributes\"")
#define E _Pragma("GCC diagnostic pop")
#define X() B int __attribute((unknown_attr)) x; E
#define Y B int __attribute((unknown_attr)) y; E
#define WRAP(x) x
void test1(void)
{
WRAP(X())
WRAP(Y)
}
/* Additional test provided on the PR. */
#define PRAGMA(...) _Pragma(#__VA_ARGS__)
#define PUSH_IGN(X) PRAGMA(GCC diagnostic push) PRAGMA(GCC diagnostic ignored X)
#define POP() PRAGMA(GCC diagnostic pop)
#define TEST(X, Y) \
PUSH_IGN("-Wtype-limits") \
int Y = (__typeof(X))-1 < 0; \
POP()
int test2()
{
unsigned x;
TEST(x, i1);
WRAP(TEST(x, i2))
return i1 + i2;
}