On Wed, Aug 10, 2022 at 03:47:10PM +0200, Richard Biener via Gcc-patches wrote: > This fixes a mistake in typing a local variable in the symbolic > shift routine. > > Bootstrap & regtest pending on x86_64-unknown-linux-gnu. > > PR tree-optimization/106513 > * gimple-ssa-store-merging.cc (do_shift_rotate): Use uint64_t > for head_marker.
Ok. > > * gcc.dg/torture/pr106513.c: New testcase. > --- /dev/null > +++ b/gcc/testsuite/gcc.dg/torture/pr106513.c > @@ -0,0 +1,26 @@ > +/* { dg-do run } */ > + > +typedef __INT64_TYPE__ int64_t; > + > +__attribute__((noinline)) int64_t > +swap64 (int64_t n) > +{ > + return (((n & (((int64_t) 0xff) )) << 56) | > + ((n & (((int64_t) 0xff) << 8)) << 40) | > + ((n & (((int64_t) 0xff) << 16)) << 24) | > + ((n & (((int64_t) 0xff) << 24)) << 8) | > + ((n & (((int64_t) 0xff) << 32)) >> 8) | > + ((n & (((int64_t) 0xff) << 40)) >> 24) | > + ((n & (((int64_t) 0xff) << 48)) >> 40) | > + ((n & ((int64_t)(0xffull << 56))) >> 56)); > +} > + > +int main (void) > +{ > + volatile int64_t n = 0x8000000000000000l; > + > + if (swap64(n) != 0xffffffffffffff80l) > + __builtin_abort (); Please use ll instead of l in both cases above. Perhaps -0x80ll would be simpler... Jakub