Viewing file:  vshift-7.c (1.83 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O1 -Wshift-count-negative -Wshift-count-overflow" } */
typedef unsigned int v1qi_t __attribute__((mode(QI), vector_size(1)));
typedef unsigned int v1hi_t __attribute__((mode(HI), vector_size(2)));
typedef unsigned int v1si_t __attribute__((mode(SI), vector_size(4)));
static const signed shift_neg = -1;
static const unsigned shift_qi = 8;
static const unsigned shift_hi = 16;
static const unsigned shift_si = 32;
v1qi_t test1qi(v1qi_t x, int c) {
switch(c) {
case 0: return x << shift_neg; /* { dg-warning "shift count is negative" } */
case 1: return x << (shift_qi - 1);
case 2: return x << shift_qi; /* { dg-warning "shift count >= width" } */
case ~0: return x >> shift_neg; /* { dg-warning "shift count is negative" } */
case ~1: return x >> (shift_qi - 1);
case ~2: return x >> shift_qi; /* { dg-warning "shift count >= width" } */
}
return c < 0 ? x >> -c : x << c;
}
v1hi_t test1hi(v1hi_t x, int c) {
switch(c) {
case 0: return x << shift_neg; /* { dg-warning "shift count is negative" } */
case 1: return x << (shift_hi - 1);
case 2: return x << shift_hi; /* { dg-warning "shift count >= width" } */
case ~0: return x >> shift_neg; /* { dg-warning "shift count is negative" } */
case ~1: return x >> (shift_hi - 1);
case ~2: return x >> shift_hi; /* { dg-warning "shift count >= width" } */
}
return c < 0 ? x >> -c : x << c;
}
v1si_t test1si(v1si_t x, int c) {
switch(c) {
case 0: return x << shift_neg; /* { dg-warning "shift count is negative" } */
case 1: return x << (shift_si - 1);
case 2: return x << shift_si; /* { dg-warning "shift count >= width" } */
case ~0: return x >> shift_neg; /* { dg-warning "shift count is negative" } */
case ~1: return x >> (shift_si - 1);
case ~2: return x >> shift_si; /* { dg-warning "shift count >= width" } */
}
return c < 0 ? x >> -c : x << c;
}
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