https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117584
--- Comment #10 from Manjunath S Matti <mmatti at linux dot vnet.ibm.com> --- Created attachment 65135 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65135&action=edit Final patch I see a few test cases fail, due to lack of support of float16 on rs6000 port. Expected UNSUPPORTED (effective-target gated, unrelated to this patch — PowerPC has no _Float16 hardware/ABI support) for both LE and BE: gcc.dg/dfp/bitint-7.c gcc.dg/bitint-132.c gcc.dg/torture/bitint-25.c (-O0, -O2) gcc.dg/bitint-108.c (-m32 only) — no __int128 support on 32-bit PowerPC (passes on -m64). gcc.dg/torture/bitint-47.c, gcc.dg/torture/bitint-61.c (-m32 only, -O0/-O2) — same int128-gating pattern. But a few failures need looking into gcc.dg/torture/bitint-32.c -m64 -O0 only (passes -O2) gcc.dg/torture/bitint-33.c -m64 -O0 only (passes -O2) gcc.dg/torture/bitint-34.c -m64 -O0 only (passes -O2) gcc.dg/torture/bitint-35.c -m64 -O0 only (passes -O2) gcc.dg/torture/bitint-36.c -m64 -O0 only (passes -O2) gcc.dg/torture/bitint-37.c -m64 -O0 only (passes -O2) gcc.dg/torture/bitint-93.c -m64 both -O0 and -O2 gcc.dg/torture/bitint-94.c -m64 both -O0 and -O2 I am debugging these issues, which points me to a code block in gcc/gcc/gimple-lower-bitint.cc => tree src = build2 (MEM_REF, atype, build_fold_addr_expr (unshare_expr (obj)), off); g = gimple_build_call (fn, 3, build_fold_addr_expr (unshare_expr (obj)), src, build_int_cst (size_type_node, obj_nelts * m_limb_size));
