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/* PR tree-optimization/80933 - redundant bzero/bcopy calls not eliminated
{ dg-do compile }
{ dg-options "-O1 -Wall -fdump-tree-lower" } */
void f0 (void *dst, const void *src, unsigned n)
{
/* Bcopy(src, dst, ...) corresponds to memmove(dst, src, ...),
with the first two arguments transposed, not memcpy. */
__builtin_bcopy (src, dst, n);
}
void f1 (void *p, const void *q, unsigned n)
{
/* A call with zero size should be eliminated. */
__builtin_bcopy (q, p, 0);
}
int f2 (const void *p, const void *q, unsigned n)
{
return __builtin_bcmp (p, q, n);
}
int f3 (const void *p, const void *q)
{
/* A call with zero size should be folded into 0. */
return __builtin_bcmp (p, q, 0);
}
int f4 (const void *p, unsigned n)
{
/* A call with the same argument should also be folded into 0. */
return __builtin_bcmp (p, p, n);
}
void f5 (void *p, unsigned n)
{
__builtin_bzero (p, n);
}
void f6 (void *p)
{
/* A call with zero size should be eliminated. */
__builtin_bzero (p, 0);
}
/* Verify that calls to bcmp, bcopy, and bzero have all been removed
and one of each replaced with memcmp, memmove, and memset, respectively.
The remaining three should be eliminated.
{ dg-final { scan-tree-dump-not "bcmp|bcopy|bzero" "lower" } }
{ dg-final { scan-tree-dump-times "memcmp|memmove|memset" 3 "lower" } }
Verify that the bcopy to memmove transformation correctly transposed
the source and destination pointer arguments.
{ dg-final { scan-tree-dump-times "memmove \\(dst, src" 1 "lower" } } */
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