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/* { dg-do run } */
/* { dg-options "-O1 -fno-tree-vrp -fwrapv" } */
/* PR tree-optimization/22236
Avoid conversion of (signed char) {(uchar)1, +, (uchar)1}_x when
it is not possible to prove that the scev does not wrap.
In this PR, a sequence 1, 2, ..., 255 has to be converted to
signed char, but this would wrap: 1, 2, ..., 127, -128, ... The
result should not be a linear scev {(schar)1, +, (schar)1}_x.
The conversion should be kept: (schar) {(uchar)1, +, (uchar)1}_x.
*/
void abort(void);
static inline void
foo (signed char a)
{
int b = a - 0x7F;
if (b > 1)
abort();
}
int main()
{
unsigned char b;
for(b = 0; b < 0xFF; b++)
foo (b);
return 0;
}
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