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| author | Jan Hubicka <jh@suse.cz> | 2003-01-14 14:03:47 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2003-01-14 13:03:47 +0000 |
| commit | 77f9af81d26ddde9326b63bfc2eefa557aba064e (patch) | |
| tree | c3eb54b4346a9236a335d6192b4c3fb9db3e36ae /gcc/fold-const.c | |
| parent | ab5496c4035e9c83e00e4ee1c87b410e6ca2c4e5 (diff) | |
| download | gcc-77f9af81d26ddde9326b63bfc2eefa557aba064e.zip gcc-77f9af81d26ddde9326b63bfc2eefa557aba064e.tar.gz gcc-77f9af81d26ddde9326b63bfc2eefa557aba064e.tar.bz2 | |
convert.c (strip_float_extensions): Look for narrowest type handling FP constants.
* convert.c (strip_float_extensions): Look for narrowest type handling
FP constants.
* fold-const.c (fold): Fold (double)float1 CMP (double)float2 into
float1 CMP float2.
* convert.c (strip_float_extensions): Make global.
* tree.h (strip_float_extensions): Declare.
* gcc.dg/i386-fpcvt-1.c: New test.
* gcc.dg/i386-fpcvt-2.c: New test.
From-SVN: r61279
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 3847fc0..726e845 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -6041,6 +6041,18 @@ fold (expr) if (FLOAT_TYPE_P (TREE_TYPE (arg0))) { + tree targ0 = strip_float_extensions (arg0); + tree targ1 = strip_float_extensions (arg1); + tree newtype = TREE_TYPE (targ0); + + if (TYPE_PRECISION (TREE_TYPE (targ1)) > TYPE_PRECISION (newtype)) + newtype = TREE_TYPE (targ1); + + /* Fold (double)float1 CMP (double)float2 into float1 CMP float2. */ + if (TYPE_PRECISION (newtype) < TYPE_PRECISION (TREE_TYPE (arg0))) + return fold (build (code, type, convert (newtype, targ0), + convert (newtype, targ1))); + /* (-a) CMP (-b) -> b CMP a */ if (TREE_CODE (arg0) == NEGATE_EXPR && TREE_CODE (arg1) == NEGATE_EXPR) |