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| author | Richard Sandiford <rsandifo@redhat.com> | 2004-09-10 12:00:33 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2004-09-10 12:00:33 +0000 |
| commit | 85d625202998b5153d40cf1fbc36a400e8e013dd (patch) | |
| tree | 24cd45cd4c7f9788733ecbef21298e2e39bb35a6 /gcc/tree-tailcall.c | |
| parent | 315fcf9741b611fa84902ae28b52863d0009da42 (diff) | |
| download | gcc-85d625202998b5153d40cf1fbc36a400e8e013dd.zip gcc-85d625202998b5153d40cf1fbc36a400e8e013dd.tar.gz gcc-85d625202998b5153d40cf1fbc36a400e8e013dd.tar.bz2 | |
tree-tailcall.c (process_assignment): Only do accumulator transforms for floating-point types if...
* tree-tailcall.c (process_assignment): Only do accumulator transforms
for floating-point types if flag_unsafe_math_optimizations.
From-SVN: r87297
Diffstat (limited to 'gcc/tree-tailcall.c')
| -rw-r--r-- | gcc/tree-tailcall.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/tree-tailcall.c b/gcc/tree-tailcall.c index e3f491e..d6cfe4c 100644 --- a/gcc/tree-tailcall.c +++ b/gcc/tree-tailcall.c @@ -282,6 +282,13 @@ process_assignment (tree ass, tree stmt, block_stmt_iterator call, tree *m, if (TREE_CODE_CLASS (code) != '2') return false; + /* Accumulator optimizations will reverse the order of operations. + We can only do that for floating-point types if we're assuming + that addition and multiplication are associative. */ + if (!flag_unsafe_math_optimizations) + if (FLOAT_TYPE_P (TREE_TYPE (DECL_RESULT (current_function_decl)))) + return false; + /* We only handle the code like x = call (); |