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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/113622] New: r14-8450 regression: ICE with
 vectors in named registers
Date: Fri, 26 Jan 2024 20:16:26 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113622

            Bug ID: 113622
           Summary: r14-8450 regression: ICE with vectors in named
                    registers
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: xry111 at gcc dot gnu.org
  Target Milestone: ---

Start from r14-8450 "tree-optimization/113602 - datarefs of non-addressable=
s",
various LoongArch target tests fail.  Reduced test case:

typedef double __attribute__ ((vector_size (32))) vec;
register vec a asm("f25"), b asm("f26"), c asm("f27");

void
test (void)
{
  for (int i =3D 0; i < 4; i++)
    c[i] =3D a[i] < b[i] ? 0.1 : 0.2;
}

$ ./gcc/cc1 t.c -O2 -msimd=3Dlasx -fno-ident -o xvfcmp-f.s -nostdinc
t.c: In function =E2=80=98test=E2=80=99:
t.c:8:10: internal compiler error: in expand_assignment, at expr.cc:6073
    8 |     c[i] =3D a[i] < b[i] ? 0.1 : 0.2;
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
0x102029b expand_assignment(tree_node*, tree_node*, bool)
        ../../gcc/gcc/expr.cc:6073
0xe7a76b expand_gimple_stmt_1
        ../../gcc/gcc/cfgexpand.cc:3992
0xe7aaf9 expand_gimple_stmt
        ../../gcc/gcc/cfgexpand.cc:4071
0xe8355b expand_gimple_basic_block
        ../../gcc/gcc/cfgexpand.cc:6127
0xe85b0d execute
        ../../gcc/gcc/cfgexpand.cc:6866=