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As the two testcases for PR94678 show, -mgeneral-regs-only is handled properly with SVE. We should issue an error message instead of expanding SVE builtin funtions when -mgeneral-regs-only option is specified. The middle end should never try to use vector patterns when the vector modes have been disabled by !have_regs_of_mode. But it's still wrong for the target to provide patterns that would inevitably lead to spill failure due to lack of registers. So we should also add check for !TARGET_GENERAL_REGS_ONLY in TARGET_SVE and other SVE related macros. 2020-04-22 Felix Yang <felix.yang@huawei.com> gcc/ PR target/94678 * config/aarch64/aarch64.h (TARGET_SVE): Add && !TARGET_GENERAL_REGS_ONLY. (TARGET_SVE2): Add && TARGET_SVE. (TARGET_SVE2_AES, TARGET_SVE2_BITPERM, TARGET_SVE2_SHA3, TARGET_SVE2_SM4): Add && TARGET_SVE2. * config/aarch64/aarch64-sve-builtins.h (sve_switcher::m_old_general_regs_only): New member. * config/aarch64/aarch64-sve-builtins.cc (check_required_registers): New function. (reported_missing_registers_p): New variable. (check_required_extensions): Call check_required_registers before return if all required extenstions are present. (sve_switcher::sve_switcher): Save TARGET_GENERAL_REGS_ONLY in m_old_general_regs_only and clear MASK_GENERAL_REGS_ONLY in global_options.x_target_flags. (sve_switcher::~sve_switcher): Set MASK_GENERAL_REGS_ONLY in global_options.x_target_flags if m_old_general_regs_only is true. gcc/testsuite/ PR target/94678 * gcc.target/aarch64/sve/acle/general/nosve_6.c: New test.
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