https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91903
--- Comment #2 from Paul E. Murphy <murphyp at linux dot vnet.ibm.com> ---
I tried this out on IBM's new AT13 compiler (GCC 9.2.1):
/opt/at13.0/bin/powerpc64le-linux-gnu-gcc -c test.c
during RTL pass: expand
test.c: In function ‘test’:
test.c:5:5: internal compiler error: in copy_to_mode_reg, at explow.c:629
5 | ret = vec_ctf(a,b);
| ~~~~^~~~~~~~~~~~~~
0x735d8b copy_to_mode_reg(machine_mode, rtx_def*)
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/explow.c:629
0xca0c21 rs6000_expand_binop_builtin
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/config/rs6000/rs6000.c:13787
0xcd0732 rs6000_expand_builtin
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/config/rs6000/rs6000.c:16619
0x64158c expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/builtins.c:7236
0x74c180 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/expr.c:11030
0x755bca store_expr(tree_node*, rtx_def*, int, bool, bool)
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/expr.c:5674
0x756bd0 expand_assignment(tree_node*, tree_node*, bool)
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/expr.c:5436
0x660440 expand_call_stmt
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/cfgexpand.c:2722
0x660440 expand_gimple_stmt_1
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/cfgexpand.c:3691
0x660440 expand_gimple_stmt
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/cfgexpand.c:3850
0x6650bf expand_gimple_basic_block
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/cfgexpand.c:5890
0x6676d6 execute
/build/at13.0_RHEL8_x86_64-ppc64le/11/at13.0-0.redhat-8_x86_64_ppc64le/sources/gcc/gcc/cfgexpand.c:6513
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