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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [torture/] [badshift.c] - Rev 867
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/* PR rtl-optimization/20532 */ /* { dg-do run } */ /* { dg-options "" } */ /* { dg-options "-march=i386" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */ /* We used to optimize the DImode shift-by-32 to zero because in combine we turned: (v << 31) + (v << 31) into: (v * (((HOST_WIDE_INT)1 << 31) + ((HOST_WIDE_INT)1 << 31))) With a 32-bit HOST_WIDE_INT, the coefficient overflowed to zero. */ unsigned long long int badshift(unsigned long long int v) { return v << 31 << 1; } extern void abort (); int main() { if (badshift (1) == 0) abort (); return 0; }
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