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| author | Roger Sayle <roger@eyesopen.com> | 2006-05-31 17:44:56 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2006-05-31 17:44:56 +0000 |
| commit | 4f31c7ec654d1b4523288f8cc6d4e21f43afd845 (patch) | |
| tree | 70e91d9c7abb8a6796d8f13001637bfc7ae2ffbd /gcc/builtins.c | |
| parent | da7fda0a9e5a88a5ad7000eda25ad552f2851392 (diff) | |
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builtins.c (fold_builtin_cabs): Delete prototype.
* builtins.c (fold_builtin_cabs): Delete prototype. Require an
additional FNDECL argument. Optimize cabs(-z) and cabs(~z) as
cabs(z).
(fold_builtin_decl) <BUILT_IN_CABS>: Update fold_builtin_cabs call.
* gcc.dg/builtins-54.c: New test case.
From-SVN: r114276
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index b9d94eb..7113681 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -146,7 +146,6 @@ static tree fold_trunc_transparent_mathfn (tree, tree); static bool readonly_data_expr (tree); static rtx expand_builtin_fabs (tree, rtx, rtx); static rtx expand_builtin_signbit (tree, rtx); -static tree fold_builtin_cabs (tree, tree); static tree fold_builtin_sqrt (tree, tree); static tree fold_builtin_cbrt (tree, tree); static tree fold_builtin_pow (tree, tree, tree); @@ -6772,11 +6771,12 @@ fold_fixed_mathfn (tree fndecl, tree arglist) } /* Fold function call to builtin cabs, cabsf or cabsl. ARGLIST - is the argument list and TYPE is the return type. Return - NULL_TREE if no if no simplification can be made. */ + is the argument list, TYPE is the return type and FNDECL is the + original function DECL. Return NULL_TREE if no if no simplification + can be made. */ static tree -fold_builtin_cabs (tree arglist, tree type) +fold_builtin_cabs (tree arglist, tree type, tree fndecl) { tree arg; @@ -6817,6 +6817,14 @@ fold_builtin_cabs (tree arglist, tree type) && real_zerop (TREE_OPERAND (arg, 1))) return fold_build1 (ABS_EXPR, type, TREE_OPERAND (arg, 0)); + /* Optimize cabs(-z) and cabs(conj(z)) as cabs(z). */ + if (TREE_CODE (arg) == NEGATE_EXPR + || TREE_CODE (arg) == CONJ_EXPR) + { + tree arglist = build_tree_list (NULL_TREE, TREE_OPERAND (arg, 0)); + return build_function_call_expr (fndecl, arglist); + } + /* Don't do this when optimizing for size. */ if (flag_unsafe_math_optimizations && optimize && !optimize_size) @@ -8648,7 +8656,7 @@ fold_builtin_1 (tree fndecl, tree arglist, bool ignore) break; CASE_FLT_FN (BUILT_IN_CABS): - return fold_builtin_cabs (arglist, type); + return fold_builtin_cabs (arglist, type, fndecl); CASE_FLT_FN (BUILT_IN_SQRT): return fold_builtin_sqrt (arglist, type); |