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author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/gcc.dg/pr56997-2.c | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/pr56997-2.c')
-rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/pr56997-2.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/pr56997-2.c b/gcc-4.9/gcc/testsuite/gcc.dg/pr56997-2.c new file mode 100644 index 000000000..759a469bd --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/pr56997-2.c @@ -0,0 +1,45 @@ +/* Test volatile access to unaligned field. */ +/* { dg-do run } */ +/* { dg-require-effective-target size32plus } */ +/* { dg-options "-fstrict-volatile-bitfields" } */ + +extern void abort (void); + +#define test_type unsigned int +#define MAGIC 0x1020304u + +typedef struct s{ + unsigned char Prefix; + test_type Type; +}__attribute((__packed__)) ss; + +volatile ss v; +ss g; + +void __attribute__((noinline)) +foo (test_type u) +{ + v.Type = u; +} + +test_type __attribute__((noinline)) +bar (void) +{ + return v.Type; +} + +int main() +{ + test_type temp; + foo(MAGIC); + __builtin_memcpy(&g, (void *)&v, sizeof(g)); + if (g.Type != MAGIC) + abort (); + + g.Type = MAGIC; + __builtin_memcpy((void *)&v, &g, sizeof(v)); + temp = bar(); + if (temp != MAGIC) + abort (); + return 0; +} |