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comparison gcc/testsuite/gcc.c-torture/compile/pr93505.c @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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131:84e7813d76e9 145:1830386684a0
1 /* PR middle-end/93505 */
2
3 unsigned a;
4
5 unsigned
6 foo (unsigned x)
7 {
8 unsigned int y = 32 - __builtin_bswap64 (-a);
9 /* This would be UB (x << 32) at runtime. Ensure we don't
10 invoke UB in the compiler because of that (visible with
11 bootstrap-ubsan). */
12 x = x << y | x >> (-y & 31);
13 x >>= 31;
14 return x;
15 }