?? pr27285.c
字號:
/* PR tree-optimization/27285 */extern void abort (void);struct S { unsigned char a, b, c, d[16]; };void __attribute__ ((noinline))foo (struct S *x, struct S *y){ int a, b; unsigned char c, *d, *e; b = x->b; d = x->d; e = y->d; a = 0; while (b) { if (b >= 8) { c = 0xff; b -= 8; } else { c = 0xff << (8 - b); b = 0; } e[a] = d[a] & c; a++; }}intmain (void){ struct S x = { 0, 25, 0, { 0xaa, 0xbb, 0xcc, 0xdd }}; struct S y = { 0, 0, 0, { 0 }}; foo (&x, &y); if (x.d[0] != y.d[0] || x.d[1] != y.d[1] || x.d[2] != y.d[2] || (x.d[3] & 0x80) != y.d[3]) abort (); return 0;}
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