Hi, I have added new STRICT_MAX_EXPR and STRICT_MIN_EXPR expressions to support the IEEE versions of fmin and fmax. This is done by recognising the math library "fmax" and "fmin" builtin functions in a similar way to how this is done for -ffast-math. This also allows us to vectorise the IEEE max/min functions for targets that support it, for example aarch64/aarch32.
Tested: x86_64-linux: no regressions aarch64-none-elf: no regressions aarch64_be-none-elf: no regressions arm-none-eabi: no regressions ChangeLog: 2015-06-26 David Sherwood <david.sherw...@arm.com> gcc/ * builtins.c (integer_valued_real_p): Add STRICT_MIN_EXPR and STRICT_MAX_EXPR. (fold_builtin_fmin_fmax): For strict math, convert builting fmin and fmax to STRICT_MIN_EXPR and STRICT_MIN_EXPR, respectively. * expr.c (expand_expr_real_2): Add STRICT_MIN_EXPR and STRICT_MAX_EXPR. * fold-const.c (const_binop): Likewise. (fold_binary_loc, tree_binary_nonnegative_warnv_p): Likewise. (tree_binary_nonzero_warnv_p): Likewise. * optabs.h (strict_minmax_support): Declare. * optabs.def: Add new optabs strict_max_optab/strict_min_optab. * optabs.c (optab_for_tree_code): Return new optabs for STRICT_MIN_EXPR and STRICT_MAX_EXPR. (strict_minmax_support): New function. * real.c (real_arithmetic): Add STRICT_MIN_EXPR and STRICT_MAX_EXPR. * tree.def: Likewise. * tree.c (associative_tree_code, commutative_tree_code): Likewise. * tree-cfg.c (verify_expr): Likewise. (verify_gimple_assign_binary): Likewise. * tree-inline.c (estimate_operator_cost): Likewise. * tree-pretty-print.c (dump_generic_node, op_code_prio): Likewise. (op_symbol_code): Likewise. * config/aarch64/aarch64.md: New pattern. * config/aarch64/aarch64-simd.md: Likewise. * config/aarch64/iterators.md: New unspecs, iterators. * config/arm/iterators.md: New iterators. * config/arm/unspecs.md: New unspecs. * config/arm/neon.md: New pattern. * config/arm/vfp.md: Likewise. gcc/testsuite * gcc.target/aarch64/maxmin_strict.c: New test. * gcc.target/arm/maxmin_strict.c: New test. * lib/target-supports.exp (check_effective_target_arm_v8_vfp_neon_ok): New check. (add_options_for_arm_v8_vfp_neon): New options. Regards, David Sherwood.
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