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| author | Richard Sandiford <richard.sandiford@arm.com> | 2015-10-27 09:29:40 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2015-10-27 09:29:40 +0000 |
| commit | 4d7836c4361c5ae2f703c03e789ac0c533dd80be (patch) | |
| tree | 77a20b470231501dd40126c4597a20cc52530819 /gcc/builtins.c | |
| parent | 4aecfe19869d2ba26ac4e4a967eb0b0cbf9b0114 (diff) | |
| download | gcc-4d7836c4361c5ae2f703c03e789ac0c533dd80be.zip gcc-4d7836c4361c5ae2f703c03e789ac0c533dd80be.tar.gz gcc-4d7836c4361c5ae2f703c03e789ac0c533dd80be.tar.bz2 | |
Move hypot folds to match.pd
Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.
gcc/
* builtins.c (fold_builtin_hypot): Delete.
(fold_builtin_2): Handle constant hypot arguments here.
* match.pd: Fold hypot(x, 0) and hypot(0, x) to x. Canonicalize
hypot(x, x) to fabs(x)*sqrt(2).
From-SVN: r229407
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 38 |
1 files changed, 4 insertions, 34 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index f947f1e..64106a1d 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -7475,39 +7475,6 @@ fold_builtin_bswap (tree fndecl, tree arg) return NULL_TREE; } -/* Fold a builtin function call to hypot, hypotf, or hypotl. Return - NULL_TREE if no simplification can be made. */ - -static tree -fold_builtin_hypot (location_t loc, tree arg0, tree arg1, tree type) -{ - tree res; - - if (!validate_arg (arg0, REAL_TYPE) - || !validate_arg (arg1, REAL_TYPE)) - return NULL_TREE; - - /* Calculate the result when the argument is a constant. */ - if ((res = do_mpfr_arg2 (arg0, arg1, type, mpfr_hypot))) - return res; - - /* If either argument is zero, hypot is fabs of the other. */ - if (real_zerop (arg0)) - return fold_build1_loc (loc, ABS_EXPR, type, arg1); - else if (real_zerop (arg1)) - return fold_build1_loc (loc, ABS_EXPR, type, arg0); - - /* hypot(x,x) -> fabs(x)*sqrt(2). */ - if (flag_unsafe_math_optimizations - && operand_equal_p (arg0, arg1, OEP_PURE_SAME)) - return fold_build2_loc (loc, MULT_EXPR, type, - fold_build1_loc (loc, ABS_EXPR, type, arg0), - build_real_truncate (type, dconst_sqrt2 ())); - - return NULL_TREE; -} - - /* Fold a builtin function call to pow, powf, or powl. Return NULL_TREE if no simplification can be made. */ static tree @@ -9456,7 +9423,10 @@ fold_builtin_2 (location_t loc, tree fndecl, tree arg0, tree arg1) break; CASE_FLT_FN (BUILT_IN_HYPOT): - return fold_builtin_hypot (loc, arg0, arg1, type); + if (validate_arg (arg0, REAL_TYPE) + && validate_arg (arg1, REAL_TYPE)) + return do_mpfr_arg2 (arg0, arg1, type, mpfr_hypot); + break; CASE_FLT_FN (BUILT_IN_CPOW): if (validate_arg (arg0, COMPLEX_TYPE) |