From: Sebastian Huber Date: Sat, 16 Jan 2021 08:00:23 +0000 (+0100) Subject: nios2: Remove custom instruction warnings X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7e02426ba0cc4f97ed347f963a6409b32c3c0c88;p=gcc.git nios2: Remove custom instruction warnings Do not warn if custom instructions are not used due to missing optimization flags. This prevents build errors with -Werror which cannot be disabled via a dedicated warning option. One reason to remove these warnings is to enable a multilib for the "Nios II Floating Point Hardware 2 Component". For example, the libatomic target library in GCC is built with -Werror and the warnings removed by this patch resulted in errors like: cc1: error: switch '-mcustom-fmins' has no effect unless '-ffinite-math-only' is specified [-Werror] cc1: error: switch '-mcustom-fmaxs' has no effect unless '-ffinite-math-only' is specified [-Werror] cc1: error: switch '-mcustom-round' has no effect unless '-fno-math-errno' is specified [-Werror] gcc/ * config/nios2/nios2.c (nios2_custom_check_insns): Remove custom instruction warnings. --- diff --git a/gcc/config/nios2/nios2.c b/gcc/config/nios2/nios2.c index 3bffabe9856..e4349e766ae 100644 --- a/gcc/config/nios2/nios2.c +++ b/gcc/config/nios2/nios2.c @@ -1186,34 +1186,6 @@ nios2_custom_check_insns (void) break; } - /* Warn if the user has certain exotic operations that won't get used - without -funsafe-math-optimizations. See expand_builtin () in - builtins.c. */ - if (!flag_unsafe_math_optimizations) - for (i = 0; i < ARRAY_SIZE (nios2_fpu_insn); i++) - if (N2FPU_ENABLED_P (i) && N2FPU_UNSAFE_P (i)) - warning (0, "switch %<-mcustom-%s%> has no effect unless " - "%<-funsafe-math-optimizations%> is specified", - N2FPU_NAME (i)); - - /* Warn if the user is trying to use -mcustom-fmins et. al, that won't - get used without -ffinite-math-only. See fold_builtin_fmin_fmax () - in builtins.c. */ - if (!flag_finite_math_only) - for (i = 0; i < ARRAY_SIZE (nios2_fpu_insn); i++) - if (N2FPU_ENABLED_P (i) && N2FPU_FINITE_P (i)) - warning (0, "switch %<-mcustom-%s%> has no effect unless " - "%<-ffinite-math-only%> is specified", N2FPU_NAME (i)); - - /* Warn if the user is trying to use a custom rounding instruction - that won't get used without -fno-math-errno. See - expand_builtin_int_roundingfn_2 () in builtins.c. */ - if (flag_errno_math) - for (i = 0; i < ARRAY_SIZE (nios2_fpu_insn); i++) - if (N2FPU_ENABLED_P (i) && N2FPU_NO_ERRNO_P (i)) - warning (0, "switch %<-mcustom-%s%> has no effect unless " - "%<-fno-math-errno%> is specified", N2FPU_NAME (i)); - if (errors || custom_code_conflict) fatal_error (input_location, "conflicting use of %<-mcustom%> switches, target attributes, "