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| author | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-06-18 12:39:23 +0000 |
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| committer | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-06-18 12:39:23 +0000 |
| commit | 2b80dc46855486d6871e58511259f4b601dffcd9 (patch) | |
| tree | b438afbff1f87123b228fcb914c7ee7f802e3879 /gcc/convert.c | |
| parent | 61c95d27915f6edaaf10f4aaaa29e39bd8d7611f (diff) | |
| download | gcc-2b80dc46855486d6871e58511259f4b601dffcd9.tar.gz | |
2009-06-18 Basile Starynkevitch <basile@starynkevitch.net>
MELT branch merged with trunk r148653
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/melt-branch@148658 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/convert.c')
| -rw-r--r-- | gcc/convert.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/convert.c b/gcc/convert.c index b6a9d3dc531..8245e1647fb 100644 --- a/gcc/convert.c +++ b/gcc/convert.c @@ -482,6 +482,37 @@ convert_to_integer (tree type, tree expr) } } + /* Convert (int)logb(d) -> ilogb(d). */ + if (optimize + && flag_unsafe_math_optimizations + && !flag_trapping_math && !flag_errno_math && flag_finite_math_only + && integer_type_node + && (outprec > TYPE_PRECISION (integer_type_node) + || (outprec == TYPE_PRECISION (integer_type_node) + && !TYPE_UNSIGNED (type)))) + { + tree s_expr = strip_float_extensions (expr); + tree s_intype = TREE_TYPE (s_expr); + const enum built_in_function fcode = builtin_mathfn_code (s_expr); + tree fn = 0; + + switch (fcode) + { + CASE_FLT_FN (BUILT_IN_LOGB): + fn = mathfn_built_in (s_intype, BUILT_IN_ILOGB); + break; + + default: + break; + } + + if (fn) + { + tree newexpr = build_call_expr (fn, 1, CALL_EXPR_ARG (s_expr, 0)); + return convert_to_integer (type, newexpr); + } + } + switch (TREE_CODE (intype)) { case POINTER_TYPE: |