diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/combine.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr99830.c | 10 |
2 files changed, 11 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 3294575..dffa3b0 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -10153,7 +10153,7 @@ simplify_and_const_int_1 (scalar_int_mode mode, rtx varop, constop &= nonzero; /* If we don't have any bits left, return zero. */ - if (constop == 0) + if (constop == 0 && !side_effects_p (varop)) return const0_rtx; /* If VAROP is a NEG of something known to be zero or 1 and CONSTOP is diff --git a/gcc/testsuite/gcc.dg/pr99830.c b/gcc/testsuite/gcc.dg/pr99830.c new file mode 100644 index 0000000..75226f5 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr99830.c @@ -0,0 +1,10 @@ +/* PR debug/99830 */ +/* { dg-do compile { target int128 } } */ +/* { dg-options "-O2 -fno-expensive-optimizations -fno-split-wide-types -g" } */ + +int foo (long a, __int128 b, short c, int d, unsigned e, __int128 f) +{ + __builtin_memmove (2 + (char *) &f, foo, 1); + c >>= (char) f; + return c; +} |