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| author | Richard Guenther <rguenther@suse.de> | 2006-10-24 08:35:12 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2006-10-24 08:35:12 +0000 |
| commit | e1502f6e2de6e37603adb0e415a5d9847bfaf990 (patch) | |
| tree | e6f6ab1c1097626958f15e10fe8bd68d769702e3 /gcc/builtins.c | |
| parent | 34fc5065e86dc46498da98d3dca4607464a1469b (diff) | |
| download | gcc-e1502f6e2de6e37603adb0e415a5d9847bfaf990.zip gcc-e1502f6e2de6e37603adb0e415a5d9847bfaf990.tar.gz gcc-e1502f6e2de6e37603adb0e415a5d9847bfaf990.tar.bz2 | |
builtins.c (fold_builtin_floor): Fold floor (x) where x is nonnegative to trunc (x).
2006-10-24 Richard Guenther <rguenther@suse.de>
* builtins.c (fold_builtin_floor): Fold floor (x) where
x is nonnegative to trunc (x).
(fold_builtin_int_roundingfn): Fold lfloor (x) where x is
nonnegative to FIX_TRUNC_EXPR.
* gcc.dg/builtins-57.c: New testcase.
From-SVN: r117998
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index c165e34..78fc11f 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -7355,6 +7355,12 @@ fold_builtin_floor (tree fndecl, tree arglist) } } + /* Fold floor (x) where x is nonnegative to trunc (x). */ + if (tree_expr_nonnegative_p (arg)) + return build_function_call_expr (mathfn_built_in (TREE_TYPE (arg), + BUILT_IN_TRUNC), + arglist); + return fold_trunc_transparent_mathfn (fndecl, arglist); } @@ -7473,6 +7479,18 @@ fold_builtin_int_roundingfn (tree fndecl, tree arglist) } } + switch (DECL_FUNCTION_CODE (fndecl)) + { + CASE_FLT_FN (BUILT_IN_LFLOOR): + CASE_FLT_FN (BUILT_IN_LLFLOOR): + /* Fold lfloor (x) where x is nonnegative to FIX_TRUNC (x). */ + if (tree_expr_nonnegative_p (arg)) + return fold_build1 (FIX_TRUNC_EXPR, TREE_TYPE (TREE_TYPE (fndecl)), + arg); + break; + default:; + } + return fold_fixed_mathfn (fndecl, arglist); } |