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author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-10-08 16:54:37 +0000 |
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committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-10-08 16:54:37 +0000 |
commit | 8b4af95f5318007e76569679c8ca2b72cfc4687d (patch) | |
tree | 19778f9222f6c9f4a0ef4c2ad38bf8ab576baaf5 /gcc/builtins.c | |
parent | ee23033372b5fa1a237d4d536721be287e74bc54 (diff) | |
download | gcc-8b4af95f5318007e76569679c8ca2b72cfc4687d.tar.gz |
Move sqrt and cbrt simplifications to match.pd
This patch moves the sqrt and cbrt simplification rules to match.pd.
builtins.c now only does the constant folding.
Bootstrapped & regression-tested on x86_64-linux-gnu.
gcc/
* builtins.c (fold_builtin_sqrt, fold_builtin_cbrt): Delete.
(fold_builtin_1): Update accordingly. Handle constant arguments here.
* match.pd: Add rules previously handled by fold_builtin_sqrt
and fold_builtin_cbrt.
gcc/testsuite/
* gcc.dg/builtins-47.c: Test the optimized dump instead.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@228616 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/builtins.c')
-rw-r--r-- | gcc/builtins.c | 149 |
1 files changed, 6 insertions, 143 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 8fa3927d339..643eeef2106 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -158,8 +158,6 @@ static bool integer_valued_real_p (tree); static tree fold_trunc_transparent_mathfn (location_t, tree, tree); static rtx expand_builtin_fabs (tree, rtx, rtx); static rtx expand_builtin_signbit (tree, rtx); -static tree fold_builtin_sqrt (location_t, tree, tree); -static tree fold_builtin_cbrt (location_t, tree, tree); static tree fold_builtin_pow (location_t, tree, tree, tree, tree); static tree fold_builtin_powi (location_t, tree, tree, tree, tree); static tree fold_builtin_cos (location_t, tree, tree, tree); @@ -7706,145 +7704,6 @@ fold_builtin_cproj (location_t loc, tree arg, tree type) return NULL_TREE; } -/* Fold a builtin function call to sqrt, sqrtf, or sqrtl with argument ARG. - Return NULL_TREE if no simplification can be made. */ - -static tree -fold_builtin_sqrt (location_t loc, tree arg, tree type) -{ - - enum built_in_function fcode; - tree res; - - if (!validate_arg (arg, REAL_TYPE)) - return NULL_TREE; - - /* Calculate the result when the argument is a constant. */ - if ((res = do_mpfr_arg1 (arg, type, mpfr_sqrt, &dconst0, NULL, true))) - return res; - - /* Optimize sqrt(expN(x)) = expN(x*0.5). */ - fcode = builtin_mathfn_code (arg); - if (flag_unsafe_math_optimizations && BUILTIN_EXPONENT_P (fcode)) - { - tree expfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0); - arg = fold_build2_loc (loc, MULT_EXPR, type, - CALL_EXPR_ARG (arg, 0), - build_real (type, dconsthalf)); - return build_call_expr_loc (loc, expfn, 1, arg); - } - - /* Optimize sqrt(Nroot(x)) -> pow(x,1/(2*N)). */ - if (flag_unsafe_math_optimizations && BUILTIN_ROOT_P (fcode)) - { - tree powfn = mathfn_built_in (type, BUILT_IN_POW); - - if (powfn) - { - tree arg0 = CALL_EXPR_ARG (arg, 0); - tree arg1 = (BUILTIN_SQRT_P (fcode) - ? build_real (type, dconst_quarter ()) - : build_real_truncate (type, dconst_sixth ())); - return build_call_expr_loc (loc, powfn, 2, arg0, arg1); - } - } - - /* Optimize sqrt(pow(x,y)) = pow(|x|,y*0.5). */ - if (flag_unsafe_math_optimizations - && (fcode == BUILT_IN_POW - || fcode == BUILT_IN_POWF - || fcode == BUILT_IN_POWL)) - { - tree powfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0); - tree arg0 = CALL_EXPR_ARG (arg, 0); - tree arg1 = CALL_EXPR_ARG (arg, 1); - tree narg1; - if (!tree_expr_nonnegative_p (arg0)) - arg0 = build1 (ABS_EXPR, type, arg0); - narg1 = fold_build2_loc (loc, MULT_EXPR, type, arg1, - build_real (type, dconsthalf)); - return build_call_expr_loc (loc, powfn, 2, arg0, narg1); - } - - return NULL_TREE; -} - -/* Fold a builtin function call to cbrt, cbrtf, or cbrtl with argument ARG. - Return NULL_TREE if no simplification can be made. */ - -static tree -fold_builtin_cbrt (location_t loc, tree arg, tree type) -{ - const enum built_in_function fcode = builtin_mathfn_code (arg); - tree res; - - if (!validate_arg (arg, REAL_TYPE)) - return NULL_TREE; - - /* Calculate the result when the argument is a constant. */ - if ((res = do_mpfr_arg1 (arg, type, mpfr_cbrt, NULL, NULL, 0))) - return res; - - if (flag_unsafe_math_optimizations) - { - /* Optimize cbrt(expN(x)) -> expN(x/3). */ - if (BUILTIN_EXPONENT_P (fcode)) - { - tree expfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0); - arg = fold_build2_loc (loc, MULT_EXPR, type, - CALL_EXPR_ARG (arg, 0), - build_real_truncate (type, dconst_third ())); - return build_call_expr_loc (loc, expfn, 1, arg); - } - - /* Optimize cbrt(sqrt(x)) -> pow(x,1/6). */ - if (BUILTIN_SQRT_P (fcode)) - { - tree powfn = mathfn_built_in (type, BUILT_IN_POW); - - if (powfn) - { - tree arg0 = CALL_EXPR_ARG (arg, 0); - tree tree_root = build_real_truncate (type, dconst_sixth ()); - return build_call_expr_loc (loc, powfn, 2, arg0, tree_root); - } - } - - /* Optimize cbrt(cbrt(x)) -> pow(x,1/9) iff x is nonnegative. */ - if (BUILTIN_CBRT_P (fcode)) - { - tree arg0 = CALL_EXPR_ARG (arg, 0); - if (tree_expr_nonnegative_p (arg0)) - { - tree powfn = mathfn_built_in (type, BUILT_IN_POW); - - if (powfn) - { - tree tree_root = build_real_truncate (type, dconst_ninth ()); - return build_call_expr_loc (loc, powfn, 2, arg0, tree_root); - } - } - } - - /* Optimize cbrt(pow(x,y)) -> pow(x,y/3) iff x is nonnegative. */ - if (fcode == BUILT_IN_POW - || fcode == BUILT_IN_POWF - || fcode == BUILT_IN_POWL) - { - tree arg00 = CALL_EXPR_ARG (arg, 0); - tree arg01 = CALL_EXPR_ARG (arg, 1); - if (tree_expr_nonnegative_p (arg00)) - { - tree powfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0); - tree c = build_real_truncate (type, dconst_third ()); - tree narg01 = fold_build2_loc (loc, MULT_EXPR, type, arg01, c); - return build_call_expr_loc (loc, powfn, 2, arg00, narg01); - } - } - } - return NULL_TREE; -} - /* Fold function call to builtin cos, cosf, or cosl with argument ARG. TYPE is the type of the return value. Return NULL_TREE if no simplification can be made. */ @@ -9940,10 +9799,14 @@ fold_builtin_1 (location_t loc, tree fndecl, tree arg0) return fold_builtin_carg (loc, arg0, type); CASE_FLT_FN (BUILT_IN_SQRT): - return fold_builtin_sqrt (loc, arg0, type); + if (validate_arg (arg0, REAL_TYPE)) + return do_mpfr_arg1 (arg0, type, mpfr_sqrt, &dconst0, NULL, true); + break; CASE_FLT_FN (BUILT_IN_CBRT): - return fold_builtin_cbrt (loc, arg0, type); + if (validate_arg (arg0, REAL_TYPE)) + return do_mpfr_arg1 (arg0, type, mpfr_cbrt, NULL, NULL, 0); + break; CASE_FLT_FN (BUILT_IN_ASIN): if (validate_arg (arg0, REAL_TYPE)) |