diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/builtins.c | 9 |
2 files changed, 14 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 784d3b0..621e59c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Sun Jun 29 23:06:32 CEST 2003 Jan Hubicka <jh@suse.cz> + + * builtins.c (expand_builtin_mathfn, expand_builtin_mathfn_2): Avoid + busy work when builtin is not supported by the backend. + 2003-06-29 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> * loop.c (count_one_set): Fix detection of registers set in more diff --git a/gcc/builtins.c b/gcc/builtins.c index 2693810..e8ab4d574 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -1789,6 +1789,10 @@ expand_builtin_mathfn (tree exp, rtx target, rtx subtarget) /* Make a suitable register to place result in. */ mode = TYPE_MODE (TREE_TYPE (exp)); + + /* Before working hard, check whether the instruction is available. */ + if (builtin_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing) + return 0; target = gen_reg_rtx (mode); if (! flag_errno_math || ! HONOR_NANS (mode)) @@ -1874,6 +1878,11 @@ expand_builtin_mathfn_2 (tree exp, rtx target, rtx subtarget) /* Make a suitable register to place result in. */ mode = TYPE_MODE (TREE_TYPE (exp)); + + /* Before working hard, check whether the instruction is available. */ + if (builtin_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing) + return 0; + target = gen_reg_rtx (mode); if (! flag_errno_math || ! HONOR_NANS (mode)) |