view gcc/testsuite/gcc.dg/combine_ashiftrt_2.c @ 131:84e7813d76e9

gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children
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/* Target architectures where RTL has been found to produce the expected
   (neg:SI (ge:SI ...)) when compiling for ILP32.  */
/* { dg-do compile { target aarch64*-*-* arm*-*-* i?86-*-* microblaze-*-* mips*-*-* powerpc*-*-* sparc*-*-* x86_64-*-* } } */
/* { dg-require-effective-target ilp32 } */
/* { dg-options "-O2 -fdump-rtl-combine-all" } */

typedef long int32_t;

int32_t
foo (int32_t a)
{
  return (~a) >> 31;
}

/* The combine phase will try to combine not & ashiftrt, and
   combine_simplify_rtx should transform (ashiftrt (not x) 31)
   to (not (ashiftrt x 63)) and then to (neg (ge x 0)). We look for
   the *attempt* to match this RTL pattern, regardless of whether an
   actual insn may be found on the platform.  */
/* { dg-final { scan-rtl-dump "\\(neg:SI \\(ge:SI" "combine" } } */